Senior Staff Machine Learning Engineer, Gen AI

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 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 Principal AI Engineer to help us develop and grow new machine learning driven products and tools. You will play a key role in enabling safe and healthy machine learning and AI driven experiences in Firefox. 

Principal Engineers are industry experts in their domain. They help define our product strategy and goals affecting multiple teams and turn our strategy into coordinated action for those teams. They mentor others through  transfer of responsibilities to more junior engineers so they can take on new ones, while collaborating with management on building team consensus and providing direction. 

What you’ll do:

• Tackle large open-ended problems and drive them to completion, collaborating with other designers and engineers to make the web a better place.
• Identify strategic opportunities where machine learning models improve the experience in Firefox.
• Lead the design, development, and integration of innovative machine learning models in Firefox, collaborating cross functionally with product management, full stack engineering and design.
• Stay up-to-date with the latest advancements in machine learning, natural language processing, and related fields to ensure our methodologies remain innovative and relevant.
• Lead by example to upskill the team on AI and generate thought leadership.

What you’ll bring:

• 8+ years experience as an Engineer in machine learning or artificial intelligence.
• Deep knowledge of core web technologies and modern machine learning concepts like  deep learning, natural language processing, large language models, reinforcement learning with expertise in one or more areas.
• Identify difficult problems that are important for the organization, collaborate across teams and the organization to find the best strategy to resolve.
• Ability to quickly analyze and solve sophisticated software development problems spanning multiple components, sometimes outside your area of expertise.
• Proven track record of technical leadership across multiple teams, shipping AI products showing a high degree of collaboration, flexibility, and respect for diverse perspectives
• Strong problem-solving skills and ability to communicate complex concepts to technical and non-technical stakeholders.
• Passion for responsible AI, transparent algorithms, and putting users’ needs first.
• Experience with analyzing large-scale dataset utilizing statistical and machine learning tools
• Experience with design of experiments, survey design, and large-scale AB testing
• You’re pragmatic about how to move things forward in specific timeframes including trade-offs and safeguards when implementing new functionality.
• Excellent written and verbal English communication skills and have participated effectively on a distributed team

Bonus Points

• You have previously successfully contributed to an open source project.
• Experience with the browser extensions architecture or ecosystem.

We value a variety of voices within our team and at Mozilla. You don’t need to check every box on this list to apply.

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)

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: B

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Req ID: R2265

Hiring Ranges:

Remote France€105.000—€152.000 EUR