Senior Software Engineer, Firefox Security

<div class=&quot;gmail_default&quot; style=&quot;font-size: small;&quot;> <div> <p><strong>Why Mozilla?</strong></p> <p><span style=&quot;font-weight: 400;&quot;>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.&nbsp;</span></p> <p><span style=&quot;font-weight: 400;&quot;>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 </span><strong>open-source</strong><span style=&quot;font-weight: 400;&quot;> software that enables people to enjoy the internet on their terms.&nbsp;</span></p> <strong>What you’ll do:</strong> <ul> <li style=&quot;font-weight: 400;&quot;><strong>Design, build and implement security and hardening features for enterprise users:</strong><span style=&quot;font-weight: 400;&quot;> Design, implement, test, and ship cutting-edge security features that strengthen Firefox’s security posture.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Advance Firefox’s security architecture across multiple operating systems: </strong><span style=&quot;font-weight: 400;&quot;>Contribute to and drive cutting-edge improvements to Firefox’s core security posture, by building privilege isolation and moving trust boundaries </span><strong>or Strengthen Firefox’s security architecture:</strong><span style=&quot;font-weight: 400;&quot;> Improve Firefox’s core security mechanisms including cryptographic protocols, WebPKI, and security-sensitive web APIs.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Contribute to our security initiatives:</strong><span style=&quot;font-weight: 400;&quot;> Work across teams to investigate security issues, identify root causes, and deliver robust, maintainable fixes.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Improve browser reliability and performance:</strong><span style=&quot;font-weight: 400;&quot;> Diagnose and resolve issues affecting stability, correctness, performance, and memory usage in a complex, multithreaded environment.</span></li> </ul> <p><strong>What you’ll bring:</strong></p> <ul> <li style=&quot;font-weight: 400;&quot;><strong>Systems programming experience and security knowledge:</strong><span style=&quot;font-weight: 400;&quot;> 3+ years of experience in low-level software engineering, strong proficiency in C and/or C++, and a solid understanding of security fundamentals.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Debugging and problem-solving skills:</strong><span style=&quot;font-weight: 400;&quot;> Experience diagnosing and resolving issues in multithreaded, cross-platform native applications, including memory and performance challenges.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Web platform and modern systems experience: </strong><span style=&quot;font-weight: 400;&quot;>Familiarity with web technologies (HTML, CSS, JavaScript) and interest or experience in Rust; ability to work effectively within large, complex, multi-language codebases.</span></li> <li style=&quot;font-weight: 400;&quot;><strong>Effective collaboration and communication:</strong><span style=&quot;font-weight: 400;&quot;> Experience working with distributed teams and communicating technical ideas clearly in writing and conversation.</span></li> </ul> <p><strong>What you’ll get:</strong></p> <ul> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Generous performance-based bonus plans to all eligible employees - we share in our success as one team</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Quarterly all-company wellness days where everyone takes a pause together</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Country specific holidays plus a day off for your birthday</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>One-time home office stipend</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Annual professional development budget</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Quarterly well-being stipend</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Considerable paid parental leave</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Employee referral bonus program</span></li> <li style=&quot;font-weight: 400;&quot;><span style=&quot;font-weight: 400;&quot;>Other benefits (life/AD&amp;D, disability, EAP, etc. - varies by country)</span></li> </ul> <p><strong>About Mozilla&nbsp;</strong></p> <p>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 oppo…