Staff Site Reliability Engineer, Tools & Systems

About this role

Build, deploy, and operate software and systems that support Firefox engineering. The role spans developer tooling, CI/CD, workflow automation, and cloud operations, with a focus on reliability, observability, performance, and cost efficiency.

About the company

Mozilla builds open-source products and technologies, including Firefox, that prioritize privacy, security, and an open internet.

Stack

What you'll do

• Design, build, deploy, and operate systems supporting Firefox engineering
• Improve developer tooling, CI/CD, workflow automation, and AI-assisted development tools
• Own complex operational problems across software and cloud infrastructure
• Use telemetry and metrics to investigate issues and guide decisions
• Contribute to architecture and technical strategy across teams
• Collaborate with Firefox Engineering, Cloud Engineering, and IT

What we're looking for

• Strong software engineering and programming skills
• Hands-on experience deploying and operating production systems in cloud environments
• Experience with infrastructure as code, such as Terraform
• Experience in several areas such as CI/CD, containers, networking, databases, observability, or developer tooling
• Ability to use data, telemetry, and metrics to investigate technical problems
• Familiarity with AI-assisted development tools and their appropriate use

Nice to have

• Experience with C++ or Rust
• Contributions to open-source projects

Benefits

• Performance-based bonus
• Medical, dental, and vision coverage
• Retirement contributions with immediate vesting
• Quarterly company wellness days
• Country-specific holidays and birthday day off
• Home office stipend
• Professional development and well-being stipends
• Paid parental leave