Senior Site Reliability Engineer

OneSignal is a Remote First Collaboration Company, offering Remote work for those who reside in London, UK. In collaboration with our partner Elements Global Services, an in-office experiences available in London, UK.

Our blog contains more information about the OneSignal Engineering career ladder, compensation model, remote-first culture, and our diverse team. Our salary bands are available on AngelList.

We have grown rapidly to where we are today serving billions of HTTP requests daily and sending upwards of over 10 billion messages daily. We achieved this scale by writing scale-sensitive components in languages like Rust and Go. This potent combination of high performance with efficient resource utilization has given us an incredible competitive edge.

With our UK partner Elements Global Services, 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 the 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 for include all of the services which power our product. This ranges from off-the-shelf services like haproxy, nginx, Redis, PostgreSQL, Kafka, Kubernetes, 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 data center 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.