Firefox OS Integration Engineer, Crash Reporting
We are Mozilla Corporation, a non‑profit‑backed technology company focused on shaping the internet for the better. With over 225 million people using our products each month, we build products such as Firefox, the privacy‑minded web browser, while staying true to our mission of making the internet better for people.
About This Team And Role
The OS Integration team ensures Firefox and other Gecko‑based products harmonize well with the host operating system and environment. This includes native crash reporting, OS abstraction layers, sandboxing and hardening. We are a distributed team with expertise in Windows, macOS, and Linux‑based operating systems, with this role focusing on macOS.
In this role, you will be a member of the OS Integration team specializing in crash reporting for Firefox. You will help to maintain and evolve client‑side crash and error reporting across supported operating systems, enabling other engineers to maintain a high quality of our products.
What You’ll Do

Develop, test, and ship fixes and new features for Firefox crash reporting, focusing on a high‑quality user and developer experience.
Work in the open‑source Mozilla codebase, touching a variety of technologies including C++, Rust, and JavaScript.
Maintain and evolve code that detects and reports crashes, interacting with low‑level OS primitives.
Analyze crash data and produce insights.
Grow your expertise while collaborating with a distributed team in technical discussions, planning, code reviews, and problem solving.
Break down problems into manageable units, seek early feedback, and document design choices to foster learning and alignment.

What You’ll Bring

A degree in Computer Science or a related field, or comparable work experience.
The desire to understand nitty‑gritty details of stack walking and post‑mortem analysis of a process.
Proven fluency in Rust and/or C++, for at least two years in a professional environment. Knowledge of compiler, debugger or OS development is a bonus.
Ideally, some engineering work examples of low‑level programming.
Strong problem‑solving and debugging skills.
Excellent written and verbal communication skills with a collaborative mindset.
Willingness to work effectively in a distributed team environment.
Commitment to our values:

Welcoming differences
Being relationship‑minded
Practicing responsible participation
Having grit



What You’ll Get

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., varying by country).

About Mozilla
Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. Join us to help create more opportunity and innovation for everyone online.
Commitment to diversity, equity, inclusion, and belonging
Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity‑seeking communities, such as women, racialized and Indigenous persons, persons with disabilities, and persons of all sexual orientations, gender identities, and expressions.
We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us at hiringaccommodation@mozilla.com to request accommodation.
We are an equal opportunity employer. We do not discriminate on the basis of race, religion, gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior.
Hiring RangesRemote France€43,000—€63,000 EUR
Group: EReq ID: R2971

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