Staff Software Engineer, OS Integrations

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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, and Pocket, a service for keeping up with the best content online. 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.

About this team and role:

The OS integration team is a cross-disciplinary team in charge of improving and maintaining Firefox on its various supported operating systems. We make sure it is a first-class citizen that integrates well with the desktop and supports new features offered by the operating system. Firefox is a sophisticated cross-platform application, and we deal with the operating system specifics. We work on things like crash reporting, interactions with third party software, sandboxing and hardening techniques, and investigate crashes. We develop close to the machine on low-level topics such as browser performance, security, Inter Process Communication (IPC), memory allocators, and power usage. We also maintain the integration with graphical widget libraries on the various operating systems.

What is a Staff Software Engineer at Mozilla?

A Staff Software Engineer is the next level from a Senior Software Engineer. At Mozilla this role can vary but typically a Staff Engineer is a domain expert who leads others within a single team to tackle multi-month projects. Tasks that may be initially ambiguous or require significant planning and require them to influence or direct the work of several engineers. They sequence deliverables and manage risks in their team's projects, provide feedback on our strategy and goals affecting the team, and turn our strategy into action for their team members. Staff Software Engineers mentor others by stewarding some responsibilities to more junior and senior engineers so they can take on new ones. They collaborate with management on building team consensus and providing direction. Staff Software Engineers identify gaps and opportunities for improvement to enable a culture of inclusion and allyship, at all levels of the organization.

What you’ll do:

• Work on Firefox for Android, implementing features and fixing bugs across Kotlin, C++, Rust, and JavaScript.
• Investigate and resolve bugs in Firefox on Linux, including GTK Widget issues, X11/Wayland, and packaging systems like Snap and Flatpak. You’ll be the hero behind crash fixes!
• Collaborate with upstream projects and engage in community discussions to enhance Firefox’s Desktop Environment integration.
• Optimize Firefox’s performance and harden its security.
• Collaborate with a globally distributed team, providing code reviews and technical direction.

What you’ll bring:

• 7+ years of overall software engineering experience.
• 5+ years of experience working in C/C++ on a Linux desktop application and/or Android application
• Knowledge of Kotlin and Android JNI programming.
• Proven ability to successfully lead and ship complex software projects.
• A proven track record of working effectively with distributed teams and building consensus in the open-source community.

• Commitment to our values:

  • Welcoming differences
  • Being relationship-minded
  • Practicing responsible participation
  • Having grit

Bonus Points if:

• You have experience with Rust.
• You have contributed to the Linux desktop environment by working on GTK, X11/Wayland, or if you've worked on a core Linux desktop package, a compositing window manager, or similar.

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
• Annual professional development budget
• 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 [email protected] 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.

Group: D

#LI-DNI

Req ID: R2652