Mozilla Careers — Staff Machine Learning Engineer, Gen AI

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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. </span></p> <span style="font-weight: 400;">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="font-weight: 400;"> software that enables people to enjoy the internet on their terms. </span> <p><strong>About this team and role:</strong></p> <p><span style="font-weight: 400;">The Firefox team is a community of engineers who care deeply about delivering the fastest, friendliest, most usable browser possible. We are responsible for making the things you see in the browser work securely, quickly, and well! We are looking for a Staff Machine Learning Engineer to help us develop and grow new Generative AI driven products and tools. You will play a key role in enabling safe and healthy machine learning and Generative AI driven experiences in Firefox. </span></p> <p><strong>What is a Staff Engineer at Mozilla? </strong></p> <p><span style="font-weight: 400;">A Staff Engineer is the next level from a Senior 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 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 Engineers identify gaps and opportunities for improvement to enable a culture of inclusion and allyship, at all levels of the organization.</span></p> <p><strong>What you’ll do:</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Lead the design, development, and integration of Generative AI solutions in Firefox, collaborating cross functionally with product management, full stack engineering and design.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Build infrastructure for training and inference of LLMs and small language and vision models for use cases on the web and mobile Firefox product experiences.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Implement robust validation and testing procedures to ensure the developed models' generalizability and reliability</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Continuously monitor and optimize deployed models for performance and efficiency</span></li> </ul> <p><strong>What you'll bring:</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">6+ years experience as a Machine Learning engineer building tooling and services for machine learning applications in production.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with designing and building machine learning tooling and infrastructure for training, deploying, inference and validation of models.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with distributed systems and platforms for AI integrations across a breadth of applications such as LLM APIs, Cloud based and open source tooling.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Leading architecture designs to execution independently and track record of improving the team’s overall AI development velocity.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Strong problem-solving skills and ability to communicate complex concepts to technical and non-technical stakeholders.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience working collaboratively with product managers, project managers, and/or other non-engineering teams.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Effective documentation and communication skills on a distributed team.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Commitment to our values:</span></li> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Welcoming differences</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Being relationship-minded</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Practicing responsible participation</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Having grit</span></li> </ul> </ul> <p><strong>Bonus Points</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Knowledge of and experience with using LLM solutions across different cloud providers</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You have previously successfully contributed to an open source project.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Track record of not only building one, but multiple projects deployed with an active user base.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with responsible AI, transparent algorithms, and putting users’ needs first.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Excellent communication skills, both in written and presentation form. You have the ability to quickly distill sophisticated topics into concepts that are tailored for your target audience.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">You are a lifelong learner, and continue to refine and improve your skills when you see an opportunity to do so.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience with the browser extensions architecture or ecosystem.</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Experience working in open source environments.</span></li> </ul> <p><strong>What you’ll get:</strong></p> <ul> <li style="font-weight: 400;"><span style="font-weight: 400;">Generous performance-based bonus plans to all eligible employees - we share in our success as one team</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Rich medical, dental, and vision coverage</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Quarterly all-company wellness days where everyone takes a pause together</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Country specific holidays plus a day off for your birthday</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">One-time home office stipend</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Annual professional development budget</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Quarterly well-being stipend</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Considerable paid parental leave</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Employee referral bonus program</span></li> <li style="font-weight: 400;"><span style="font-weight: 400;">Other benefits (life/AD&D, disability, EAP, etc. - varies by country)</span></li> </ul> <p><strong>About Mozilla </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 opportunity and innovation for everyone online.</p> <p><strong>Commitment to diversity, equity, inclusion, and belonging</strong></p> <p>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 orientation<span style="">s, </span>gender identities, and expressions.</p> <p>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 <a class="external-link" href="mailto:hiringaccommodation@mozilla.com">hiringaccommodation@mozilla.com</a> to request accommodation.</p> <p>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.</p> <p>Group: C</p> <p>#LI-DNI</p> <p>Req ID: R2593</p> </div> </div> </div> <div class="job-apply"> <div class="mzp-c-menu-list"> <h3 class="mzp-c-menu-list-title">Apply Now</h3> <ul class="mzp-c-menu-list-list"> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230860">Remote Sweden</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230848">Remote Netherlands</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230798">Remote France</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230792">Remote Germany</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6141865">Remote Canada</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230843">Remote Belgium</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230834">Remote Spain</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230827">Remote Finland</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230815">Remote Denmark</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6230803">Remote UK</a></li> <li class="mzp-c-menu-list-item"><a href="https://job-boards.greenhouse.io/mozilla/jobs/6141864">Remote US</a></li> </ul> </div> </div> <p><a rel="external noopener noreferrer" target="_blank" href="https://docs.google.com/document/d/e/2PACX-1vTEeCImDA-kqr0wm3JwfOv_2MS5FZ8oyL2pEWfVsZbeO87E41r2wePoOhppQ4qX6w/pub">Applicant Privacy Notice</a></p> </section> </div> <section id="why" class="mzp-c-callout"> <div class="mzp-l-content mzp-t-content-md"> <h2 class="mzp-c-callout-title">Why Mozilla?</h2> <p class="mzp-c-callout-desc"> 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. </p> </div> </section> <div class="mzp-l-content mzp-t-content-xl"> <section class="mzp-l-card-third"> <div class="mzp-c-card"> <div class="mzp-c-card-content"> <h3 class="mzp-c-card-title">Our values drive our actions</h3> <div class="mzp-c-card-desc"> <ul class="mzp-u-list-styled"> <li> Purpose is built into our work, with our mission driving every decision </li> <li>We challenge assumptions, the status quo, ourselves, and each other</li> <li> We are transparent: in our code, our business partnerships, and our everyday interactions </li> <li> We seek out people from diverse backgrounds and with perspectives different from our own </li> <li>We pair purpose with performance and put people ahead of profit</li> </ul> </div> </div> </div> <div class="mzp-c-card"> <div class="mzp-c-card-content"> <h3 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