Full-Time Senior Staff Full-stack Engineer

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 Sr Staff Full Stack 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. 

What you’ll do:

• Drive the completion of major Generative AI integrations on clear timelines that span across multiple teams and organizations in Mozilla.
• Ensure that the software your team delivers is high quality, measurable, and maintainable.
• Work with front-end teams across Firefox to support, and extend, existing systems to apply innovative ways and technologies in reaching Firefox’s goals
• Partner closely with third party Generative providers to integrate seamlessly in Firefox’s ecosystem.
• Write engineering proposals for the team’s biggest projects and provide feedback for major architectural decisions across the organization.
• Collaborate with management on building consensus across the org and providing guidance.

What you’ll bring:

• 10+ years of overall software engineering experience
• Confirmed ability to effectively lead and ship sophisticated software projects
• Ability to influence roadmaps and execution in the teams you and your team partner with.
• Expertise in working on sophisticated full-stack systems at scale
• Expertise in one of the following back-end technologies: Golang, Rust or Java
• Expertise in one of the following front-end technologies: Javascript, React, or Node.js
• Ability to take initiative in a loosely structured environment to navigate your team to success.
• Mentor and guide junior engineers on the team and across the teams.
• Strong communication skills with internal and external(third party) collaborators.
• Dedication to our values:
• Welcoming differences
• Being relationship-minded
• Practicing responsible participation
• Having grit

Bonus Points for…

• Experience in cloud based AI integrations such as ChatGPT, Mistral, Claude, Gemini to name a few.
• Experience with large language models providers and AI, prompt engineering and A/B testing experimentation.
• Experience in data privacy
• Experience with the browser extensions architecture or ecosystem.
• Experience working in open source environments.

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)