Published: Fri, 13 Jun 2025 12:50:52 GMT
USA Tier 1 Locations
$210,000 — $280,000 USD
USA Tier 2 Locations
$190,000 — $253,000 USD
Position: New Products Principal Engineer
Location: To be determined based on applicant’s location
Company Overview:
Mozilla Corporation is a non-profit-backed technology company that has been shaping the internet for the better for the past 25 years. Our pioneering brands, such as Firefox, have helped reclaim an internet built for people, not companies. With over 225 million monthly users worldwide, we are constantly working towards our mission to make the internet a better place. Our work spans across diverse areas including AI, social media, security, and more. As a wholly-owned subsidiary of the non-profit 501(c) Mozilla Foundation, we are not beholden to any shareholders and are solely focused on our mission. Along with thousands of volunteer contributors and collaborators, our team of Mozillians designs, builds, and distributes open-source software that empowers people to enjoy the internet on their own terms.
About the Role:
The New Products team at Mozilla is seeking a founding Principal Software Engineer to lead the technical vision and architecture for our browser-automation stack for AI agents. In this role, you will work closely with a small, fast-moving team of engineers to deliver core libraries, services, and tooling that will revolutionize the way developers integrate web interactions into their agentic applications. If you thrive on rolling up your sleeves, shipping code that developers love, and shaping green-field products from the ground up, this is the role for you.
Responsibilities:
– Define and communicate the long-term technical roadmap for our browser-automation stack, balancing rapid iteration with long-term maintainability and scalability.
– Write elegant, high-performance code daily in languages such as Go, Ruby on Rails, and TypeScript. Rapidly prototype, benchmark, and ship features to production.
– 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, establish the engineering culture, and foster a team of technical excellence and psychological safety.
– Work closely with product, design, and developer-relations to ensure technical choices align with developer needs and business goals. Turn community feedback into concrete improvements.
– Translate complex technical trade-offs into clear language for executives, partners, and cross-functional teams. Provide regular updates on progress, risks, and mitigation strategies.
Requirements:
– 10+ years of software engineering experience building high-performance developer tools, SDKs, or distributed systems, with 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 in production environments (cloud, edge, or hybrid).
– Deep understanding of browser internals, automation frameworks (e.g., Playwright, Puppeteer, Selenium), and secure web interaction paradigms.
– Hands-on experience and opinions about modern AI/ML workflows or agent frameworks such as LangChain, LlamaIndex, or custom in-house systems.
– Strong focus on code quality, testability, performance, and operational excellence; familiarity with TDD, automated testing, and observability stacks.
– Exceptional communication skills with the ability to collaborate across disciplines and levels, from junior engineers to executive leadership.
Nice to Have:
– Prior experience as a founding or early-stage CTO, Principal Engineer, or Staff+ engineer at a fast-growing startup or open-source project.
– Experience building production systems in browser automation, AI tooling, or developer infrastructure.
– Knowledge of privacy-preserving technologies, secure computation, or web standards bodies.
– Experience optimizing build systems, WebAssembly pipelines, or cross-language bindings.
– Public speaking or writing history (talks, blogs, whitepapers) explaining complex technical topics to diverse audiences.
Benefits:
– Generous performance-based bonus plans for all eligible employees.
– Comprehensive 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 (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 have the opportunity to make a difference in the lives of Web users everywhere. 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:
At Mozilla, we value diverse creative practices and forms of knowledge, as we believe they are crucial to and enrich our core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions. We also provide reasonable accommodations for qualified individuals with disabilities to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us at [email protected] to request accommodation.
We are an equal opportunity employer and 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
#LI-REMOTE
ReqID: R2805
Hiring Ranges:
Canada Tier 1 Locations
$191,000 — $255,000 CAD
Canada Tier 2 Locations
$173,000 — $230,000 CAD
USA Tier 1 Locations
$210,000 — $280,000 USD
USA Tier 2 Locations
$190,000 — $253,000 USD Apply link