Staff Site Reliability Engineer, Tools & Systems

Mozilla

Remote · France€5,417–7,250 gross/mofull-timeMozilla Careers

We are looking for an experienced and versatile software engineer to work on the tools and systems that support Firefox engineering. This is a broad software engineering role spanning internal engineering systems, developer tooling, workflow automation, and the infrastructure required to operate them.

Responsibilities

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.

Languages

Work format: Remote
Seniority: Senior
Posted: 22 Oct 2026
Last verified: In the last 5 days

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