OneSignal is a leading omnichannel customer engagement solution, powering personalized customer journeys across mobile and web push notifications, in-app messaging, SMS, and email. On a mission to democratize engagement, we enable over a million businesses to keep their users - including readers, fans, players and shoppers - engaged and up to date by delivering 12 billion messages daily. 

1 in 5 new apps launches using OneSignal! We support companies in 140 countries, including Zynga, USA Today, Bitcoin.com, Eventbrite, Tribune, and many more - from startups and small businesses just getting off the ground to established companies communicating with millions of customers.

We’re Series C, venture-backed by SignalFire, Rakuten Ventures, Y Combinator, HubSpot, and BAM Elevate. We offer remote work as the default option in the United States in California, New York, Pennsylvania, Texas, Utah and Washington. As well as in the UK and Singapore - with plans to expand the locations we support in the future. Some roles are hybrid roles and will be listed as such. We have offices in San Mateo, CA and London, UK, and offer flex seating options for employees to work together in-person where we don't have offices. Hiring in Singapore is done in partnership with a local PEO.

OneSignal has a lot of the great tech startup qualities you'd expect, but we don't stop there. Our massive scale and small team, emphasis on healthy life balance and kindness in all our interactions, and focus on ownership and personal growth make OneSignal a uniquely great place to work. 

Our blog contains more information about the OneSignal Engineering career ladder, and our diverse team.

About The Team:

Our Customer Engagement team develops the products and features our customers use to build, orchestrate, and evaluate the impact of multi-channel user engagement campaigns. We develop a deep understanding of both our customers’ workflows and the technical details of all the messaging channels we offer to build highly configurable, no-code solutions that help our customers confidently engage the right user, at the right moment, with the right kind of message. 

As a Fullstack Senior Software Engineer, you'll have the autonomy to take ownership of significant projects and make a direct impact on our platform's performance and features. Your expertise will shape the way businesses engage with their users

What You'll Do:

  • Collaborate closely with Product Managers, Designers, and fellow engineers to design and implement new features and functionalities (fullstack) for our Customer Engagement System, using languages such as TypeScript, Ruby, Rust, and Golang.
  • Maintain existing frontend and backend systems from multiple different platforms / technologies
  • Actively participate in peer code reviews and Technical Design Spec reviews, providing valuable technical insights to continuously improve our code base
  • Work together with the team to efficiently resolve production issues and ensure the system scales smoothly to meet the growing demands of our customers.
  • Refactor existing components on the frontend, creating extensible, reusable and clean component architecture
  • Stay up-to-date with the latest industry trends and technologies, incorporating new ideas into our engineering processes

What You'll Bring:

  • 6+ years of professional software development experience
  • Experience with React / TypeScript 
  • Experience working with backend distributed systems at scale
  • Experience with Rust and/or Golang, or a strong willingness to learn these two languages quickly
  • Experience with distributed system event streaming framework such as Apache Kafka
  • Experience creating extensible, reusable components in the frontend
  • Experience with Docker and Kubernetes
  • Experience designing RESTful or gRPC APIs
  • Experience with data modeling and at least one database engine (MySQL, PostgreSQL, Redis, MongoDB, Cassandra, ScyllaDB, etc.)
  • Ability to own and deliver end to end software functionality from design/architect, to implementation, testing, production, release, and monitoring
  • Ability to manage complex cross-team coordinations and work closely with product owners
  • Ability to evaluate and communicate different engineering solutions and trade-offs

We value a variety of experiences, and these are not required. It would be an added bonus if you have experience in any of the following:

  • Ruby/Rails
  • ScyllaDB
  • Kubernetes
  • Google Cloud Platform
  • Benchmarking and optimizing performance critical code

The New York and California base salary for this full time position is between $160,000 to $180,000. Your exact starting salary is determined by a number of factors such as your experience, skills, and qualifications. In addition to base salary, we also offer a competitive equity program and comprehensive and inclusive benefits.

Qualities we look for:

  • Friendliness & Empathy
  • Accountability & Collaboration
  • Proactiveness & Urgency
  • Growth Mindset & Love of Learning

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 in our workplace.

Applicants with disabilities may be entitled to reasonable accommodation under the terms of the Americans with Disabilities Act and certain state or local laws. A reasonable accommodation is a change in the way things are normally done which will ensure an equal employment opportunity without imposing undue hardship on OneSignal. Please inform us if you need assistance completing any forms or to otherwise participate in the application and/or interview process.

OneSignal collects and processes personal data submitted by job applicants in accordance with our Privacy Policy - including GDPR and CCPA compliance. Please see our privacy notice for job applicants.

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