Powering the world's messages

What we do

We provide a simple, developer-friendly interface to push notifications and email for apps and websites.

We started as app developers who just wanted a developer-friendly API for push notifications. Finding no good solution, we built one ourselves.

Today, we are the leading solution for push notifications and email, supporting over 988,884 developers. OneSignal is available on every platform and development environment that supports push, letting content creators focus on quality user engagement instead of complex implementation.

Our goal is to democratize communication tools for everyone from individual blogs to top tier apps.

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We run the world’s fastest Rust backend, sending over 175,000 notifications / second
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We serve more than 100 million end users for each engineer on the team
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We pride ourselves on prompt support and best in class documentation, to make sure every developer can run OneSignal
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We support the latest notification features and offer first- or third-party SDKs for every major platform and device capable of push.
Our Stack
Rust, Ruby on Rails, TypeScript, React, Redis, PostgreSQL
Flow chart explaining how push wroks

What we believe

We strive to build a happy, healthy work environment driven by our core values:

We create an environment where each person directly helps the company meet its goals. We hire great people and bring out the best in each other through regular feedback, creating an inclusive and conscientious work environment, providing opportunities for learning, and being humble.

We provide mission-critical products for our clients and they depend on us for exceptional support, highly available service, great documentation, and listening to their feedback. Ensuring the success of our customers is everyone’s responsibility.

Huge leaps are made not by taking the road well traveled, but by trying novel approaches and occasionally succeeding. Because of the nature of risk taking, we celebrate both successes and failures, and we view such failures as a learning opportunity.

We lead by example, putting rigor into our work and communicating with transparency and intellectual honesty. To demonstrate this we set aggressive goals, address issues in their nascency, and take personal responsibility for helping the company meet its goals.

We believe that happiness, fun, and energy fuels creativity and innovation and creates a more open and communicative workplace. We host regular off-sites and social events to bring the team closer together. We’re grateful for our successes and we celebrate them.

Benefits

  • Lunch, Dinner, and Snacks
  • Flexible work hours
  • Unlimited vacation, at least 3 weeks recommended
  • Health, dental, and vision insurance
  • Choice of workstation including sit/stand desks
  • 401(k) plan
  • Monthly team activities

Available Positions

UX Engineer

San Mateo, California


OneSignal is looking for a UX Engineer to help design the UX and UI of our messaging platform used by 1 million app developers, and our mobile app experiences that reach billions of devices. We're looking for a team member with attention to detail and who understands design is equal parts form and function. You will work closely with engineering, product and other areas of the business to help make our product more intuitive and delightful to use.  We are looking for someone who puts our users first and is able to articulate their design decisions. We want people that have a ‘ship it’ mentality and have a passion for always measuring and learning. We want people who care about building easy to use products and have a savvy for using data to make better design decisions. You’ll join our small Design team. We’re a nimble group that spans user research, user experience, prototyping, visual design, brand design, design systems and UI development. We sketch a lot. We prototype a lot. We talk to users to validate our work. We run cross functional workshops to influence design thinking across the company.


Responsibilities

  • Work directly on the UI and UX of our web and mobile products
  • Work with product managers and engineers to explore the problem space and solutions
  • Develop user flows, wireframes and other assets to help facilitate product discovery
  • Design high fidelity mockups and prototypes for new features
  • Develop OneSignal’s design system by building components, collaborating in the design process and contributing to the system’s architectural decisions
  • Provide and solicit feedback from cross-functional stakeholders
  • Work closely with the engineering team to deliver a quality product
  • Bring an engineering perspective to the design process to voice issues with feasibility and call out missed edge-cases
  • Be a constant advocate for collaboration as well as act as a bridge between design and engineering


Experience and Skills

  • 3+ years experience working on a web platform
  • Strong design skills, specifically around accessibility, user-centered thinking and interaction design
  • Intuitive mind for good user experience
  • Effectively communicate with other team members
  • Experience designing for both responsive web and mobile
  • Obsessive attention to pixels
  • Portfolio of past work showcasing your process
  • Mastery of design and prototyping tools such as Figma and Sketch (we use Figma)
  • Understand technical requirements and aspects of modern apps
  • Experience designing and shipping projects from start to finish
  • Fluent with HTML, CSS and JavaScript (we use React and TypeScript)


Perks

  • Flexible work hours with WFH/no-meeting Wednesdays
  • Unlimited vacation
  • Health, dental, vision insurance
  • Commuter benefits — fund your train, bus, Uber and Lyft rides
  • Your choice of work station and equipment
  • 401K Plan
  • Office & home gym reimbursement


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Product Designer

San Mateo, California


OneSignal is looking for a Product Designer to help design the UX of our messaging platform used by 1 million app developers, and our mobile app experiences that reach billions of devices. We're looking for a team member with attention to detail and who understands design is equal parts form and function. You will work closely with engineering, product and other areas of the business to help make our product more intuitive and delightful to use.  We are looking for someone who puts our users first and is able to articulate their design decisions. We want people that have a ‘ship it’ mentality and have a passion for always measuring and learning. We want people who care about building easy to use products and have a savvy for using data to make better design decisions. You’ll join our small Design team. We’re a nimble group that spans user research, user experience, prototyping, visual design, brand design, design systems and UI development. We sketch a lot. We prototype a lot. We talk to users to validate our work. We run cross functional workshops to influence design thinking across the company.


Responsibilities

  • Work directly on the UI and UX of our web and mobile products
  • Work with product managers and engineers to explore the problem space and solutions
  • Develop user flows, wireframes and other assets to help facilitate product discovery
  • Design high fidelity mockups and prototypes for new features
  • Provide and solicit feedback from cross-functional stakeholders
  • Work closely with the engineering team to deliver a quality product
  • Observe current user behavior and propose design suggestions to improve UX
  • Conduct various types of UX research including both qualitative and quantitative
  • Work with design and engineering to implement and evolve our design system
  • Build empathy and understanding of our users and how to empower them


Experience and Skills

  • 3+ years experience in a similar role
  • Intuitive mind for good user experience
  • Ability to analyze, optimize, and simplify workflows
  • Effectively communicate with other team members
  • Experience designing for both responsive web and mobile
  • Relevant understanding of best practices and trends in UI/UX design
  • Obsessive attention to pixels
  • Portfolio of past work showcasing your process
  • Mastery of design and prototyping tools such as Figma and Sketch (we use Figma)
  • Familiar with building and thinking in design systems
  • Understand technical requirements and aspects of modern apps
  • Demonstrated ability to design and define user experiences from blank sheets of paper to shipped solution
  • (BONUS) Experience writing HTML/CSS


Perks

  • Flexible work hours with WFH/no-meeting Wednesdays
  • Unlimited vacation
  • Health, dental, vision insurance
  • Commuter benefits — fund your train, bus, Uber and Lyft rides
  • Your choice of work station and equipment
  • 401K Plan
  • Office & home gym reimbursement


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Account Executive, Enterprise LATAM

San Mateo, California


 When you pick up your smartphone, the first thing you’ll see are push notifications - maybe there’s a breaking news alert, a mobile game reminder, an alert that inventory is low on an item you are looking to purchase… Whatever it is, chances are the message you’re reading was sent using OneSignal.   1 million+ mobile app developers and companies use OneSignal to send push notifications. We started as a Y Combinator-backed game developer. Our founders were frustrated with existing push notification tools, so we built our own system. It took off like wildfire. Now we help businesses send 7 Billion push notifications every single day.    The company is growing quickly, even during these unique times, across both revenue and employees. It’s a great time to join because we’re still early - we’ve raised a total of $35M from investors including SignalFire and Rakuten Ventures (Techcrunch). And despite our early stage, we have massive market penetration (Source: BuiltWith).  We’re seeking sales professionals to help OneSignal empower effective communication to help great ideas to scale, and grow the customer base to more than 100,000 over the next few years. The primary responsibilities will be successfully growing usage and converting businesses to paid OneSignal customers.   This team member will be eager, energetic, a problem solver who can learn in a fast-paced, innovative, technical environment.  Ideal candidates will have an interest in push notifications and messaging, and how companies can integrate the OneSignal product into their existing workflows, systems to more effectively connect and grow engagement with their users.  Excitement to be part of a rocketship growth startup that isn’t a fine-tuned machine, requiring every early hire to be willing to wear different hats and do what’s necessary to make the company successful.  


Skills and experience:

  • 8+ years of software sales experience
  • Knowledge of the LATAM region: culture, companies, currency considerations
  • Fluent in Spanish (written & verbal) & collaboration skills
  • Experience with Martech, mobile SDK’s, Javascript and/or messaging a major plus
  • Incredible attention to detail (tracking activities; follow up with customers) 
  • Bring a competitive, team spirit and a growth mindset
  • Bonus points if you speak/write fluently additional languages, and/or have experience selling messaging products. 


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Developer Evangelist

San Mateo, California


When you pick up your smartphone, the first thing you’ll see are push notifications. Maybe there’s a breaking news alert, a game reminder, a promo from Princeton Review… Whatever it is, chances are the message you’re reading was sent using OneSignal! 950k+ mobile app developers and companies use OneSignal to send push notifications. We started as a Y Combinator-backed game developer. Our founders were frustrated with existing push notification tools, so we built our own system. Now we help businesses send 7+ billion push notifications every single day. As the founding Developer Evangelist at OneSignal, reporting to our VP of Engineering, you will lead our worldwide evangelism efforts. You will be responsible for defining and executing on a strategy that defines how OneSignal builds relationships with developers across the globe. We are seeking a driven, experienced, and enthusiastic leader to help us elevate our relationship with our developer community and drive the next round of 10x growth at OneSignal.


What you'll do:

  • Lead virtual or in-person events to evangelize OneSignal's product
  • Speak and represent OneSignal at conferences
  • Contribute to documentation, code samples, and sample projects
  • Write technical blog posts and tutorials for the OneSignal blog or partner blogs
  • Participate in online communities & forums with target audiences (Unity forum, StackOverflow, etc)
  • Parter with other engineering and marketing leads to drive forward OneSignal thought leadership


Skills and experience:

  • 2+ years experience in a Developer Evangelism role
  • Strong development skills: software development experience in one or more general purpose programming languages (bonus points for Rust), and mobile engineering experience with the ability to create high-quality mobile applications from scratch
  • Experience interacting with RESTful APIS
  • Customer driven mentality, with a drive to go above and beyond to make sure our customers are successful
  • Proficiency in written and oral communications with a strong affinity for technical writing
  • Love of learning, friendliness, empathy, and modesty


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Customer Success

San Mateo, California


When you pick up your smartphone, the first thing you’ll see are push notifications - maybe there’s a breaking news alert, an HQ Trivia game reminder, a promo from Princeton Review… Whatever it is, chances are the message you’re reading was sent using OneSignal. 1 Million+ mobile app developers and marketing teams use OneSignal to send push notifications. We started as a Y Combinator-backed game developer. Our founders were frustrated with existing push notification tools, so we built our own system. It took off like wildfire. Now we help businesses send 7+ Billion push notifications every single day. In the last year OneSignal has grown revenue by 500%, added 250,000+ new accounts, and doubled its headcount. We have raised a total of $34M from investors including SignalFire, Y Combinator, and Rakuten Ventures. OneSignal customers include Volkswagen, Verizon, Burger King, 7 Eleven, Zynga, Virgin Mobile, KFC, and many more. Join us in scaling the business!  We’re seeking a Customer Success professionals to help define OneSignal’s customer success processes, to lead implementation with new large partners and successfully grow our most strategic partners.   Your responsibilities will include working closely with product, customer support, sales to onboard, integrate and scale the OneSignal service with our largest and most strategic partners.  The role is focused on two main responsibilities -- retaining/growing our top existing customers and successfully implementing our most strategic new customers.


Skills and experience:

  • 2-10+ years of experience
  • Strong communication (written & verbal) & collaboration skills
  • Experience leading customer business reviews & onboarding
  • Incredible attention to detail to master dates/deliverables
  • Help define the template & playbook for customer success; experience iterating plans a nice to have
  • Bonus points if you have data analysis, speak fluently additional languages fluently and/or have a working knowledge of web and/or mobile development languages.


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Product Manager

San Mateo, California


Over 900k mobile app developers and marketing teams use OneSignal to send push notifications, in-app messages, and emails. We started as a Y Combinator backed company. Our founders were frustrated with existing push notification tools, so we built our own system. Our customers can design banners, pop-ups, and interstitials without a single line of code.  When you pick up your smartphone, the first thing you will see are push notifications - maybe there’s a breaking news alert, a football game reminder, a promo from your favorite retailer. Whatever it is, chances are the message you are reading was sent using OneSignal. Now we help businesses send over 6 billion push notifications every single day.  In the last year, OneSignal has grown revenue by 500%, added 250,000+ new accounts, and doubled its headcount to over 50 employees. We have raised a total of $34M from investors including SignalFire, Y Combinator, and Rakuten Ventures. OneSignal customers include Volkswagen, Verizon, Burger King, 7 Eleven, Zynga, Virgin Mobile, KFC, and many more. Join us in scaling the business! We’re seeking an experienced Product Manager to help us build the future of how apps engage their users. Today, OneSignal is already used to send billions of notifications. Your work will contribute to us expanding our already large scale while keeping an ethos of radical ease-of-use. Even a first-time web developer or marketer should see amazing results with OneSignal. You’ll work side-by-side with OneSignal’s engineering teams to define APIs, white-board product ideas, and create visual prototypes with OneSignal’s experienced design team. Throughout your work, you’ll live and breath data -- leveraging data to validate your hypotheses and the impact of your work.


Skills and experience:

  • 3+ years of experience operating at scale in a tech company or fast-growing startup
  • Strong design skills - familiarity with at least one common design tool (Sketch, Balsamiq, Figma) and willingness to roll up your sleeves to mock out screens
  • Familiarity with coding - you don’t need to be a CS major, but you should have a strong quantitative / technical background and be able to navigate your way through code and make simple changes on your own
  • Strong data analytics skills - including strong SQL skills and the ability to formulate / structure complex analyses to answer key product questions
  • Product execution - a demonstrated track record of delivering high-quality products at scale
  • Business sense - you can ruthlessly prioritize ways to build the company and work with our business teams to quantify the value of different features 
  • Strong communication (written & verbal) & collaboration skills


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



Apply Online Email Application

General Application

San Mateo, California


If you don't see a job that you are interested in, please submit your resume for future consideration. 


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Senior Full Stack Software Engineer

San Mateo, California


We’re seeking an experienced Senior Full Stack software engineer to lead the development of improvements to OneSignal’s dashboard and API. Every day, thousands of clients visit our website and dashboard, and thousands more use our API. Our clients love what we’ve built so far and we can’t wait to make it even better. Your responsibilities will include working closely with a product designer and our clients to help build new features and improve our existing ones. You will primarily program in Ruby on Rails, Typescript, and React. You will also contribute to improving OneSignal’s API and bare-metal infrastructure alongside our backend development team.


Skills and experience:

  • Get excited about the idea of joining a small but fast growing startup
  • Enjoy rapid iteration. We ship code multiple times per day
  • Have at least 5 years of prior experience in roles that include front-end and back-end development at a small or mid-sized business
  • Know Ruby on Rails, Django, or similar MVC framework
  • Fluent in Javascript, Typescript, HTML, and CSS
  • Experience writing complex queries with MySQL or PostgreSQL
  • Experience working in an environment where developers have written tests and shared ownership of code.


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Data Engineer

San Mateo, California


We're looking for an engineer interested in developing, maintaining, and scaling data pipelines that empower our organization to make data-driven decisions in all areas of business.  You’ll work on huge datasets (more than 150 billion events a month), building systems that make messaging more powerful and relevant for more than 1 million developers. We have built a data lake that ingests terabyte-scale data and gets queried by a MPP SQL engine, which is used daily by our internal data users. We plan to extend this usage to our core product and you will take on a core role to scale and architect our data infrastructure. You will also be laying the foundation for customer-facing data features that will help millions of websites and apps to reach their goals.


What you'll do:

  • Identify innovative applications of data to enable new features in our core product
  • Work closely with the product and BI teams to help understand data better
  • Maintain and develop data pipelines
  • Architect solutions to address our data pipeline scaling needs
  • Open source contributions


Skills and experience:

  • 3+ years of experience working with the Hadoop ecosystem. (HDFS, Hive)
  • 2+ years of experience working with data pipelines (Airflow, Oozie)
  • Experience working with MPP databases (Presto, Impala)
  • Experience writing with at least one statically typed language such as Rust, Java, C++, etc.
  • Experience with scripting languages, e.g. Bash, Python,
  • Good to have experience in R, Matlab, VBA, C#, stream processing (Kafka) 
  • Proficiency in written and oral communications
  • Ability to collaborate well on a team
  • Can deliver solutions independently 
  • Friendliness, empathy, modesty, and love of learning


Preferred skills and experience:

  • Experience operating data infrastructure on Kubernetes
  • Experience writing a custom Presto/Hive plugin
  • Experience working with structured data serialization (ProtoBuf, Cap’n Proto)
  • Strong understanding of the CQRS pattern/event sourcing


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Business Operations

San Mateo, California


San Mateo, California 900K+ mobile app developers and marketing teams use OneSignal to send push notifications, in-app messages, and emails. We started as a YCombinator-backed company. Our founders were frustrated with existing push notification tools, so we built our own system. Our customers can design banners, pop-ups, and interstitials without a single line of code.  When you pick up your smartphone, the first thing you will see are push notifications - maybe there’s a breaking news alert, a football game reminder, a promo from your favorite retailer. Whatever it is, chances are the message you are reading was sent using OneSignal. Now we help businesses send over 5 billion push notifications every single day.  In the last year, Onesignal has grown revenue by 500%, added 250,000+ new accounts, and doubled its headcount to ~50 employees. We have raised a total of $34M from investors including SignalFire, Y Combinator, and Rakuten Ventures. OneSignal customers include Volkswagen, Verizon, Burger King, 7 Eleven, Zynga, Virgin Mobile, KFC, and many more. Join us in scaling the business! What you'll do: High growth companies tend to change as they grow and the role of business operations is to anticipate the growth and to set things up so the company can scale quickly or to fill important gaps in this business as they arise. The role will span many areas and is an individual contributor role. - Automate and set up processes across the business in particular so that there are organized data flows - Assist in alleviating tactical bottlenecks in the business including contract processing and organization  - Ability to query data and build dashboards and conduct analysis for different departments - Assist with new technical integrations of software platforms across our the business - Evaluate our pricing to optimize adoption and revenue and conducting pricing analysis and assist in developing our pricing strategy - Work on our international expansion strategy including setting up additional offices abroad - Track and select business KPIs to analyze how our business is doing and to raise issues as needed - Assist with board slides, management materials, investor materials, and potential acquisitions  Skills and Experience: - Technically inclined with modeling skills in Excel, ability work with SQL, knowledge of python or R preferred - A passion for operations particularly with respect to Saas businesses is a plus - Ability to structure complex problems and drive solutions cross-functionally in sales, marketing, finance, product, and operations - Detail oriented and a humble personality that is willing to work on both strategic and tactical projects


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Site Reliability Engineer

Los Angeles


OneSignal has grown rapidly to where we are today serving billions of HTTP requests daily and sending upwards of 5 billion messages daily. We achieved this scale by leveraging bare metal cloud and writing scale sensitive components in languages like Rust and Go. This potent combination of high performance, low cost hardware with efficient resource utilization has given us an incredible competitive edge. We are hiring SREs to help us continue to scale by operating and engineering the future of our infrastructure. We are maintaining 99.95% uptime today, and we are investing to ensure we maintain that as then business continues to grow and as the product evolves. Your primary task will be software engineering with a focus on infrastructure, operations, and automation. You'll be building systems to run our product, improving internal services, and advising product teams on architecture as it relates to the operability of the service. The systems you'll be responsible include all of the services which power our product. This ranges from off-the-shelf services like haproxy, nginx, Redis, PostgreSQL, Kafka, and etc. to our in-house services such as the Rails web app, various Rust backend services, and our high performance API layer written in Go. You'll be working with Kubernetes to automate our datacenter operations and writing operational services to automate database operations. One of the key challenges in this role is to not only understand systems to the point of being able to manually operate by hand, but also to understand in sufficient detail to write software systems to automate such operations. For some additional context on how we think about SRE, please see the introductory chapter of the Google SRE book.


Skills and experience:

  • At least 3 years experience working as a software engineer
  • Experience operating reliable production systems at scale
  • Knowledge of Linux systems internals
  • Experience writing networking applications
  • Easily bored running tasks by hand and the ability to automate such tasks
  • Experience with PostgreSQL


Preferred skills and experience:

  • Operational experience deploying and managing Kubernetes on bare metal
  • Experience writing Kubernetes controllers and operators
  • Recent experience writing Go and/or Rust
  • Past experience as an SRE
  • Experience working with Layers 1-3 of the OSI networking model
  • Experience with any of Redis, Kafka, etcd, ZooKeeper, nginx, haproxy


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Distributed Systems Architect

San Mateo, California


OneSignal is seeking an experienced Systems architect that will continue to enhance our highly available, scalable system architecture to support our growth of more than 6 billion notifications per day. Our 900,000+ developers using the product send more than 6 billion notifications per day, and that number continues to grow quickly. Our clients love what we’ve built so far, and we’re excited to work on scaling the product the support more than 10x the number of daily notifications. As a systems architect, you’ll be working on improving and extending our core infrastructure API’s, infrastructure to help scale our product to support 10x the current capacity as well as architect a number of new features in the product that will allow our customers to leverage our notification system in new powerful ways. Our primary language is Rust, and while the language is not required, we’re looking for someone with multiple years of experience in a statically typed language.


What you'll do:

  • Architecting new solutions to support high growth, scale and availability
  • Reviewing system infrastructure, and proposing efficient scalable solutions 
  • Designing/implementing services that give users greater power and flexibility
  • Benchmarking performance, and productionizing development efforts
  • Writing code, scaffolding and working with a team to achieve your architecture vision
  • Documenting detailed technical architecture
  • Evangelizing design patterns, and great development techniques


Skills and experience:

  • 6+ years of experience writing software
  • 2+ years of experience working with distributed systems
  • Strong technical writer
  • Experience writing with a statically typed language such as Rust, Java, C++, etc.
  • Experience with infrastructure and capacity planning
  • Solid understanding of web service architecture. To be less ambiguous, we are looking for knowledge of the following systems and how they fit together: http clients, DNS, load balancers, reverse proxies, CDNs, application servers (ex. Rails), databases, and caches.
  • Open to learning and writing Rust
  • Understanding of how multiplexed I/O works
  • Friendliness and empathy
  • Modesty
  • Proficiency in written and oral communications
  • Ability to collaborate well on a team
  • Can deliver solutions independently as well
  • Love of learning


Preferred skills and experience:

  • Experience writing Kafka consumer and streaming applications
  • Proficiency with administering Linux systems and applications
  • Again, these are nice-to-haves. Even if you don't know them, we hope you are interested in learning them!


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



Apply Online Email Application

Site Reliability Engineer

San Mateo, California


OneSignal has grown rapidly to where we are today serving billions of HTTP requests daily and sending upwards of 5 billion messages daily. We achieved this scale by leveraging bare metal cloud and writing scale sensitive components in languages like Rust and Go. This potent combination of high performance, low cost hardware with efficient resource utilization has given us an incredible competitive edge. We are hiring SREs to help us continue to scale by operating and engineering the future of our infrastructure. We are maintaining 99.95% uptime today, and we are investing to ensure we maintain that as then business continues to grow and as the product evolves. Your primary task will be software engineering with a focus on infrastructure, operations, and automation. You'll be building systems to run our product, improving internal services, and advising product teams on architecture as it relates to the operability of the service. The systems you'll be responsible include all of the services which power our product. This ranges from off-the-shelf services like haproxy, nginx, Redis, PostgreSQL, Kafka, and etc. to our in-house services such as the Rails web app, various Rust backend services, and our high performance API layer written in Go. You'll be working with Kubernetes to automate our datacenter operations and writing operational services to automate database operations. One of the key challenges in this role is to not only understand systems to the point of being able to manually operate by hand, but also to understand in sufficient detail to write software systems to automate such operations. For some additional context on how we think about SRE, please see the introductory chapter of the Google SRE book.


Skills and experience:

  • At least 3 years experience working as a software engineer
  • Experience operating reliable production systems at scale
  • Knowledge of Linux systems internals
  • Experience writing networking applications
  • Easily bored running tasks by hand and the ability to automate such tasks
  • Experience with PostgreSQL


Preferred skills and experience:

  • Operational experience deploying and managing Kubernetes on bare metal
  • Experience writing Kubernetes controllers and operators
  • Recent experience writing Go and/or Rust
  • Past experience as an SRE
  • Experience working with Layers 1-3 of the OSI networking model
  • Experience with any of Redis, Kafka, etcd, ZooKeeper, nginx, haproxy


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Business Intelligence Engineer

San Mateo, California


800K+ mobile app developers and marketing teams use OneSignal to send push notifications, in-app messages, and emails. We started as a YCombinator-backed company. Our founders were frustrated with existing push notification tools, so we built our own system. Our customers can design banners, pop-ups, and interstitials without a single line of code.  When you pick up your smartphone, the first thing you will see are push notifications - maybe there’s a breaking news alert, a football game reminder, a promo from your favorite retailer. Whatever it is, chances are the message you are reading was sent using OneSignal. Now we help businesses send over 5 billion push notifications every single day.  The company has been growing quickly both in terms of revenue and employees. We have raised a total of $34M from investors including SignalFire, Y Combinator, and Rakuten Ventures. OneSignal customers include Volkswagen, Verizon, Burger King, 7 Eleven, Zynga, Virgin Mobile, KFC, and many more. Join us in scaling the business!


What you'll do:

  • Help query data from our systems to build reports and analysis to derive actionable insight for the sales team, customer success, marketing, support, product 
  • Run SQL queries for teams to better acquire and retain customers, develop marketing strategies, bill our customers, as well as inform related product decisions
  • Develop in depth reports and dashboards for individual groups across the organization
  • Help evaluate and develop and build automated tracking of KPIs across the business as well 
  • Create automated cohort analysis and revenue bridges to monitor acquisition, expansion, and churn and other Saas metrics
  • Evaluate ways to increase the efficiency of internal data flows and centralize sources of truth including generating a universal customer ID that can span across the organization
  • Build a tool that will allow people across the company to have access to data that will scale with the company growth
  • Connect SaaS tool data into a data warehouse. This could include data from Salesforce, NetSuite, Recurly, and backend entitlement data
  • Assist in architecting and designing a scalable data warehouse that can be connected to a business intelligence tool. 
  • Connect SaaS tool data into a data warehouse. This could include data from Salesforce, NetSuite, Recurly, and backend entitlement data
  • Evaluate ways to increase the efficiency of internal data flows and centralize sources of truth


Skills and experience:

  • Minimum of 2+ years of experience
  • Skilled at querying relational databases (SQL) and ability to create ETL pipelines
  • Proficiency with programming languages such as Python, Ruby, Java, etc.
  • In-depth experience with business intelligence and analytics tools
  • Strong critical thinking skills and attention to detail
  • Knowledge of database systems such as Postgresql, Hadoop, Hive, Spark, Kafka, etc
  • Experience working at a SaaS company is helpful


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Software Engineer in Test

San Mateo, California


We’re seeking an experienced Software Engineer in Test to help lead the development of our frameworks and automated test suites for OneSignal’s dashboard, SDK's and API's. Every day hundreds of thousands of clients visit our website and dashboard, and use our API's. We send billions of notifications through our services and SDK's every day. Our clients love what we’ve built so far and we can’t wait to make it even better. Your responsibilities will include extending and building our automation test suites across front-end, mobile, and back-end, in an environment that is continuously integrating and deploying several times per week. 


Skills and experience:

  • Get excited about the idea of joining a small but fast growing startup
  • Have 5+ years of prior experience implementing test coverage across SaaS based products
  • Ability to analyze, plan and pragmatically develop our test suites for highest leverage coverage
  • Experience working with product managers to understand new product use-cases to extend our automation capability
  • Experience integrating and extending test coverage through our integration and deployment infrastructure
  • Have experience with one or more test suites such as Selenium, Robot, Appium and BDD frameworks.
  • Experience writing code in one or more languages, such as Python, Go, Rust, Java, Objective-C, and JavaScript


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



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Senior Backend Engineer

San Mateo, California


We're looking for an engineer interested in writing Rust. Experience with the language is not required, but we are looking for experience in some sort of statically typed language and a couple years of experience. We have several projects using Rust today including the OnePush delivery service, pstats, our stats daemon that runs on each server, and oscachemgr, a cache manager for our front end servers. We've recently started another Rust project pertaining to analytical work on our ever-growing data set. We're also starting to plan a project to integrate Rust into our Rails application. In addition to the Rust projects, business needs may at times require you to work on another part of the application such as Rails or infrastructure.


What you'll do:

  • Work closely with a small team shipping lots of code
  • Write Rust and Ruby
  • Add features to and improving our push delivery service
  • Work on native Rust extensions to our Rails application
  • Open source contributions - we have contributed patches to several crates and released one of our own. We aspire to do more of this as time progresses
  • Contribute to our stats monitoring process (Rust) which runs on all of our servers
  • Architect solutions to address our scaling needs
  • Design and build a custom message queue


Skills and experience:

  • 5+ years of experience writing software for distributed systems
  • Experience writing with a statically typed language such as Rust, C++, etc
  • Solid understanding of web service architecture, systems and how they fit together such as: http clients, DNS, load balancers, reverse proxies, CDNs, application servers (ex. Rails), databases, and caches
  • Open to learning and writing Rust and Go
  • Proficiency in written and oral communications
  • Ability to collaborate well on a team
  • Friendliness and empathy
  • Modesty
  • Can deliver solutions independently
  • Love of learning


Preferred skills and experience:

  • Experience extending an interpreted language with native code
  • Familiarity with Redis, PostgreSQL and Kafka
  • Proficiency with Linux systems
  • Familiarity with POSIX C APIs
  • Understanding of how multiplexed I/O works
  • Again, these are nice-to-haves. Even if you don't know them, we hope you are interested in learning them!


In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place at OneSignal.



Apply Online Email Application

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