Staff Site Reliability Engineer, Tools & Systems

• Design, build, deploy, and operate software and systems supporting Firefox engineering
• Contribute to developer tooling, CI/CD, workflow automation, and AI-assisted development tools
• Own complex technical problems end-to-end across software, cloud, and operational layers, improving reliability, performance, observability, and cost efficiency
• Work with Firefox engineering, Cloud Engineering, IT, and other teams to solve problems spanning technical and organizational boundaries
• Use telemetry, metrics, and data analysis to investigate problems and guide engineering decisions
• Contribute to architecture and technical strategy, identifying recurring problems and scalable solutions across teams
• Join teams or existing efforts when needed and independently take ownership of focused problems
• Contribute back to the broader open-source ecosystem

• Strong software engineering skills and substantial hands-on experience deploying and operating production systems
• Strong programming skills in languages such as Python or JavaScript/TypeScript
• Experience with C++ or Rust is useful
• Experience building, deploying, and operating production systems in cloud environments
• Experience utilizing infrastructure as code such as Terraform
• Experience across several areas such as CI/CD, containers and orchestration, networking, databases, observability, or developer tooling
• Experience using data, telemetry, and metrics to investigate technical problems and make decisions
• Familiarity with modern AI-assisted development tools and an understanding of their capabilities, limitations, and appropriate use
• Ability to work effectively across disciplines and translate between software, infrastructure, and operational concerns
• Ability to communicate openly, consistently, and respectfully, and teach and help others build skills
• Open-source contribution is an important part of the role

• Generous performance-based bonus plans to all eligible employees - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all-company wellness days where everyone takes a pause together
• Country specific holidays plus a day off for your birthday
• One-time home office stipend
• Annual professional development budget
• Quarterly well-being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. - varies by country)