Staff Software Engineer, Tools & Systems is open at Mozilla (Remote Belgium). The posting gives a salary of €72K - €96K. Posted on Oct 22, 2026, and still on Mozilla’s careers page when we last checked, on Nov 14, 2026.
About the role
. 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…
The opening lines of the posting. The rest is on Mozilla’s careers page.
Hiring at Mozilla
Mozilla has 121 open roles right now, 121 of them remote. Most are in Engineering, Security and Sales & Business Development. The median advertised salary across its roles with a published range is $178K. See all its roles
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