Firefox OS Integration: Windows Senior Software Engineer

Firefox OS Integration:
Windows Senior Software Engineer

Remote Canada

Why Mozilla?

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.

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. We work on components of Firefox including, but not limited to, native crash reporting, OS abstraction layers, platform‑specific features, sandboxing and hardening. We’re a distributed team with expertise in Windows, macOS, and Linux‑based operating systems. In this role, you will be a member of the OS Integration team specializing in the Windows platform.

What you’ll do:

• Improve the quality of Firefox on Windows by developing fixes and improvements, improving the user experience for hundreds of millions of users.
• Help develop and ship major new Firefox features on Windows.
• Work on cross‑platform features and projects for other platforms such as macOS, Linux, and Android as needed.
• Collaborate with other teams by providing code review and technical direction.
• Work with a geographically‑distributed development team.

What you’ll bring:

• A degree in Computer Science or a related field or comparable work experience.
• A solid understanding of C and C++.
• Demonstrated experience with low‑level systems programming on Windows.
• Strong problem‑solving and debugging skills.
• 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 - we share in our success as one team
• Rich medical, dental, and vision coverage
• Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
• Quarterly all‑company wellness days where everyone takes a pause together
• Country specific holidays plus a day off for your birthday
• One‑time home office stipend
• Quarterly well‑being stipend
• Considerable paid parental leave
• Employee referral bonus program
• Other benefits (life/AD&D, disability, EAP, etc. – varies 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. And you give us a chance to make a difference in your life every single day.

Join us to work on the Web as the platform and 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 (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, 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, as appropriate.

Please contact us at hi to request accommodation.

We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, 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, conduct, or purpose.

Hiring Ranges:

$104,000 - $139,000 CAD

$94,000 - $126,000 CAD