Staff Site Reliability Engineer, Tools & Systems
Level inferred from job title
Job description
An experienced, versatile software engineer to build and operate the tools and systems supporting Firefox engineering, spanning developer tooling, workflow automation, CI/CD, and cloud infrastructure. The role works across projects and technical domains, solving operational problems and establishing standards and patterns.
At a glance
- Employment
- Full-time · Employee (employment agreement)
- Work mode
- Remote · Netherlands
- Pay
- EUR 78,000 – 105,000 / year
What you'll do
- 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 that span 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 solutions that can be applied across teams
What we're looking for
- 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 building, deploying and operating production systems in cloud environments, including 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
- Comfortable jumping into unfamiliar systems and getting them into a sustainable state
- Enjoys moving across projects and technical domains, taking ownership of problems and looking for patterns
- Works effectively across disciplines and can translate between software, infrastructure, and operational concerns
- Combines hands-on engineering with systems thinking and longer-term technical judgment
- Communicates openly, consistently, and respectfully, and enjoys teaching and helping others build skills
Nice to have
- Experience with C++ or Rust
Your team
Cloud Engineering
Cloud Engineering teams provide shared platforms and foundational services, while engineering teams own the applications and services they run on them.
Benefits
- Generous performance-based bonus plans to all eligible employees
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
- Quarterly all-company wellness days
- 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)
Apply
Direct apply at Mozilla
Opens the job posting at Mozilla
About Mozilla
The non-profit-backed technology company that has shaped the internet for the better over the last 25 years
Mozilla Corporation is the non-profit-backed technology company behind brands like Firefox, the privacy-minded web browser. With more than 225 million people around the world using its products each month, it focuses on diverse areas including AI, social media, security and more. Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation.
Mission
To make the internet better for people; to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled
Key facts
- Technology
- More than 225 million people around the world use Mozilla products each month
- Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation
- Not beholden to any shareholders — only to its mission
- Builds in the open and contributes to the broader open-source ecosystem
What they value
- Open source is fundamental to how we work
- Communicate openly, consistently, and respectfully
- Diversity, equity, inclusion, and belonging