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New Products Principal Engineer at Mozilla. Location Information: United States. 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.. Define and communicate the long-term technical roadmap for the browser-automation stack.. Write elegant, high-performance code daily in languages such as Go, Ruby on Rails, and TypeScript.. Design distributed, fault-tolerant services and developer-facing SDKs/APIs.. Own cloud infrastructure, CI/CD pipelines, security, and observability.. Grow, mentor, and inspire a world-class engineering team.. Conduct thoughtful code reviews and establish the engineering culture.. Collaborate closely with product, design, and developer-relations teams.. Translate complex technical trade-offs into clear language for stakeholders.. 10+ years of software engineering experience building high-performance developer tools, SDKs, or distributed systems.. At least 3 years leading technical teams or large projects.. Expert-level proficiency in at least two of Go, Ruby (Rails), Python or TypeScript/JavaScript.. Proven track record architecting and shipping complex, high-throughput systems.. Deep understanding of browser internals, automation frameworks, and secure web interaction paradigms.. Experience with AI/ML workflows or agent frameworks.. Strong focus on code quality, testability, performance, and operational excellence.. Pay range:. $184K - $288K. Generous performance-based bonus plans.. Rich medical, dental, and vision coverage.. Generous retirement contributions with 100% immediate vesting.. Quarterly all-company wellness days.. 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 vary by country.