Key Skills

Job Description

Help us improve your Mozilla experience In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy. Cookie settings Products Firefox browsers Mozilla VPN Mozilla Monitor Firefox Relay MDN Plus Thunderbird 0DIN Tabstack Otari All products About us Our Mission About Mozilla The Mozilla Manifesto Get Involved Blog Our Work Mozilla Foundation Mozilla.ai Mozilla Ventures Mozilla Advertising Mozilla Builders Mozilla New Products Mozilla Careers Menu Overview Diversity and Inclusion Benefits Teams Locations Job Listings Senior Software Engineer, Privacy at Mozilla Corporation Team: Firefox Locations: Remote UK, Remote Finland, Remote Germany, Remote Sweden, Remote France, Remote Netherlands, Remote Spain, Remote Belgium Remote UK Remote Finland Remote Germany Remote Sweden Remote France Remote Netherlands Remote Spain Remote Belgium 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 This Team And Role Are you passionate about Privacy Protections and the Open Web? Do you want to ship software to a large user base? Do you want your contributions to have a positive impact on the world? Do you want to advance current browser architecture to make the web a safer place for users? 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 restricted. We are looking for a Senior Software Engineer to support the Privacy Team to advance the Firefox Web Platform. What You'll Do Implement Privacy-improving, anti-tracking and threat intelligence protection into the Firefox web browser to mitigate user tracking and phishing. Implement architectural improvements into Gecko, the browser engine underlying Firefox. Build performant, low-latency, and maintainable C++, JavaScript and Rust code Work as part of a geographically distributed team in an asynchronous manner (mostly Europe and US-East). What you'll bring: Bachelor's degree in computer science, engineering, or a related program; or equivalent work experience. At least 4 years of experience with programming in C++ and Rust, with a strong background in memory safety, multi-threaded system architecture, or raw data stream manipulation. Proven ability to onboard quickly, deliver and improve complex software projects. Proven track record of independently scoping and landing complex features within tight release windows. Excellent written and verbal communication skills. You can validate your progress and decisions and communicate them clearly. Bonus Points: You have already contributed to the Mozilla mission and the codebase. Experience working within the browser space (Gecko, Chromium, WebKit) or web engine runtime abstractions. Experience or high interest in designing or leveraging ML pipelines to automate internal developer workflows. Deep understanding of web architecture, the privacy/security model of the web, and client-side data structures. Knowledge of basic statistical modeling. Proficiency with Python and SQL. What You’ll Get Generous performance-based bonus plans to all eligible employees - we share in our success as one team 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 Req ID: R3260 Hiring Ranges Remote Spain €58.000—€77.000 EUR Remote UK Remote Finland Remote Germany Remote Sweden Remote France Remote Netherlands Remote Spain Remote Belgium Applicant Privacy Notice Why Mozilla? At Mozilla, we’re serving humanity—by maintaining a safe, open internet—while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla. Our values drive our actions Purpose is built into our work, with our mission driving every decision We challenge assumptions, the status quo, ourselves, and each other We are transparent: in our code, our business partnerships, and our everyday interactions We seek out people from diverse backgrounds and with perspectives different from our own We pair purpose with performance and put people ahead of profit Our impact is global 1000+ paid staff from over 30 countries Thousands of volunteer contributors across six continents 2 global offices: Berlin and Toronto 9 coworking space locations: San Francisco, San Mateo, London, Paris, Portland, Tulsa, Vancouver, Chicago, and Bellevue Hundreds of home offices globally Our benefits are world-class Flexible work environment (majority of Mozillians work remotely) Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents) Reimbursement for professional development (up to $3,000/year) A work setup including the latest hardware and software of your choice Company Leadership Press Center Careers Merch Store Contact Support Product Help File a Bug Localize Mozilla Security Developers Developer Edition Enterprise Tools MDN Firefox Release Notes Follow @Mozilla Bluesky (@mozilla.org) Instagram (@mozilla) LinkedIn (@mozilla) TikTok (@mozilla) Spotify (@mozilla) Follow @Firefox Bluesky (@firefox.com) Instagram (@firefox) YouTube (@firefoxchannel) TikTok (@firefox) Donate All languages Language English (Canadian) English (British) English Donate to the not-for-profit Mozilla Foundation. 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Core Responsibilities

Develop privacy, anti-tracking, and threat-intelligence protections in Firefox to mitigate tracking and phishing. Improve the Gecko browser engine and deliver performant, maintainable software as part of a geographically distributed team.

Requirements

A bachelor's degree in computer science, engineering, or a related field, or equivalent work experience, is required, along with at least four years of C++ and Rust programming experience. Candidates should have experience with memory safety, multithreaded systems, or raw data streams, and be able to independently scope and deliver complex software features while communicating clearly.

Benefits

• Performance-Based Bonuses
• Retirement Contributions
• Wellness Days
• Country-Specific Holidays
• Birthday Leave
• Home Office Stipend
• Professional Development Budget
• Well-Being Stipend
• Paid Parental Leave
• Employee Referral Bonus
• Life and Accidental Death and Dismemberment Insurance
• Disability Benefits
• Employee Assistance Program