Senior Software Engineer, OS Integration
MozillaRemote (Finland)
- Pay listed by the employer
- €45,000–€60,000 a year
- Posted
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Job 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.
About the OS Integration team:
The OS Integration team ensures Firefox works well with the host operating system and environment. We’re a distributed team with expertise in Windows, macOS, and Linux-based operating systems. Our responsibilities include developing fixes and improvements for Firefox related to Windows, macOS, and Linux environments. This might include integration with a new OS feature or fixing an OS-specific user interface bug. Other responsibilities include native crash reporting, OS abstraction layers, sandboxing, hardening, updater, and enterprise DLP support.
About the role
As a member of the OS Integration team, you’ll develop fixes, improvements, and new features for Firefox. In many cases work may be cross-platform or have a cross-platform component. This role will include maintenance and development of the installer and updater of Firefox. You’ll contribute to the team through code review and discussion.
What you’ll do
Improve the quality of Firefox and other Mozilla products by debugging and fixing software defects, improving the browsing experience for hundreds of millions of users.
Contribute to new features and improvements.
Break down tasks and work with others to deliver solutions.
Collaborate with experienced software engineers.
Perform code reviews and provide technical direction.
Work with a geographically-distributed development team.
Interact with teams throughout the organization.
What you’ll bring
5+ years of overall software engineering experience
Strong knowledge of C and C++
Experience with desktop application development on Windows, macOS, or Linux with C++.
Knowledge of web technologies such as Javascript and HTML.
Knowledge of secure coding practices and memory safety concerns.
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:
Play to win
Build for People first
Engage Evidence over Ego
Decide and Deliver
Ship, learn and repeat
Bonus Points for experience with:
Installer and/or Updater development on any OS
Windows internals like the BITS server or MSIX packages
Open-source contributions or personal engineering projects
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
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 hiringaccommodation@mozilla.com 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-REMOTE
Req ID: R3288
Hiring Ranges:
Remote Finland
€45.000 - €60.000 EUR
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What the Mozilla application asks
From 8 application forms we checked.
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- From 8 forms we checked, 8 ask for a cover letter; about 13 questions only Mozilla asks per form. What it asks
- Pay benchmark
- Software Engineer postings that list pay show a $175K median (30,399 postings)
- Pay benchmark
- Mozilla postings that list pay show a $100K median (71 postings)
- H-1B
- Mozilla has H-1B labor condition applications on file with the U.S. Department of Labor (at least 3 filings, fiscal years 2025–2026). An LCA is not a visa approval. H-1B sponsors hiring now
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