Senior Software Engineer, Core Services (Backend)

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 billions of 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, Colorado, Massachusetts, New York, New Jersey, Oregon, 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. 

OneSignal has grown rapidly. Today we are serving billions of HTTP requests. We achieved this scale by leveraging modern, high performance data-stores and writing scale-sensitive components in languages like Rust. This potent combination of high-performance, low-cost hardware with efficient resource utilization has given us an incredible competitive edge.

The Core Services team enables product development at OneSignal through the design, development, and operation of cross-cutting horizontal services, which form the backbone of our technical stack. This includes the delivery pipeline, responsible for delivering over 12 billion push notifications, SMS, and emails every day, gRPC services, and Kafka. You will work with Rust, gRPC, Redis, Kafka, Scylla, ClickHouse, Pulsar, PostgreSQL, and occasionally Golang and Ruby. The team is responsible for systems that operate on several hundred thousand events per second while maintaining durability and reliability.

As a Senior Software Engineer, you'll have the autonomy to take ownership of significant projects and directly impact our platform's performance and features. Your expertise will shape the way businesses engage with their users. Working remotely or on-site at our San Mateo office, you'll have the flexibility to create a schedule that works best for you, allowing you to excel in both your professional and personal life.

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

• Experience with relational databases
• Experience designing and operating reliable production systems that process terabytes or petabytes of data per day
• Experience with distributed system event streaming frameworks such as Apache Kafka or Pulsar
• Experience with any of Redis, Scylla, Apache Cassandra, ClickHouse, gRPC
• Experience profiling applications to improve performance in terms of time/CPU/memory
• Experience debugging issues in distributed systems
• Experience with Docker and Kubernetes

The New York and California base salary for this full time position is between $170,000 to $190,000. 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.

• 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.