Senior Software Engineer, Firefox Security

Mozilla · Remote (France) · Full-time

Salary: EUR 53,000 – 71,000 / year

Description

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people. The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms. What you’ll do: Design, build and implement security and hardening features for enterprise users: Design, implement, test, and ship cutting-edge security features that strengthen Firefox’s security posture. Advance Firef…

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Questions about this job

Where is this Senior Software Engineer, Firefox Security job located?

It is listed as Remote (France), so it can be done from home.

Who is hiring?

The employer shown on the listing is Mozilla.

What is the salary?

The listing shows: EUR 53,000 – 71,000 / year. Confirm the exact pay, overtime and payment date with the employer before accepting.

Is it full-time or part-time?

The listing type is Full-time.

When was this job posted?

It was posted on 27 October 2026. Jobs that stay open too long are closed automatically, so apply soon if you are interested.

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