Senior Site Reliability Engineer

San Mateo, California

Full Time Senior-level / Expert
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Posted 1 month ago

OneSignal has grown rapidly to where we are today serving billions of HTTP requests daily and sending upwards of over 8 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.

In a typical month, an SRE at OneSignal might:

  • Troubleshoot and repair an issue with items getting dispatched from Kafka
  • Improve our CI/CD pipeline to improve deploy performance
  • Assist the support team in determining if a customer report indicates a bug in our system
  • Develop new tools to enable other developers to better spend their time
  • Add new code to the system to enable messaging users on a new platform
  • Help evaluate a new storage technology to further scale our stack

Skills and experience:

  • At least 5+ years experience working as a software engineer
  • Experience operating reliable production systems at scale
  • Knowledge of Linux systems internals
  • 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.
Job tags: CD CI Go High performance Kafka Kubernetes Linux Nginx PostgreSQL Rails Redis
Job region(s): North America
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