Senior Software Development Engineer, Firefox Integration

4 weeks ago

London, Greater London, United Kingdom Mozilla Full time

Staff Software Engineer, OS Integrations

at Mozilla Corporation

Team: Firefox

Locations: Remote

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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.

Firebase 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).

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