New Products Principal Engineer Remote US

Mozilla Corporation; United States; Remote; USD 184,000 - 288,000; Full time

Job summary

Mozilla Corporation is seeking a Principal Software Engineer to lead the technical vision, build production code, and guide a talented team in developing intelligent web automation tools. The successful candidate will play a pivotal role in designing high-performance systems while fostering a culture of excellence and collaboration within the team.

Benefits

Generous performance-based bonus plans

Rich medical, dental, and vision coverage

Generous paid parental leave

Quarterly wellness days

Home-office stipend

Qualifications

• 10+ years of software engineering experience.
• 3 years of team leadership experience.
• Proven track record with high-throughput systems.

Responsibilities

• Write high-performance code in Go, Ruby on Rails, and TypeScript.
• Design fault-tolerant services and APIs.
• Mentor and grow the engineering team.

Skills

High-performance coding

System design

Team leadership

Collaboration

Stakeholder communication

Technical mentoring

Problem-solving

Education

Bachelor's degree in Computer Science or related field

Job description

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Why Mozilla?

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:

We are seeking a founding Principal Software Engineer who will set the technical vision, architect the platform, and spend the majority of their time writing production code alongside the team. You will guide a small, fast-moving group of engineers, and personally deliver the core libraries, services, and tooling that empower the next generation of intelligent web automation. If you thrive on rolling up your sleeves, love shipping code that developers adore, and enjoy shaping green-field products from the ground up, we’d love to meet you.

What you’ll do:

• Hands-On Development: Write elegant, high-performance code daily in languages such as Go, Ruby on Rails, and TypeScript. Rapidly prototype, benchmark, and ship features to production.
• System Design & Infrastructure: Design distributed, fault-tolerant services and developer-facing SDKs/APIs. Own cloud infrastructure, CI/CD pipelines, security, and observability.
• Team Leadership & Mentorship: 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.
• Collaboration & Product Direction: 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.
• Stakeholder Communication: Translate complex technical trade-offs into clear language for executives, partners, and cross-functional teams. Provide regular updates on progress, risks, and mitigation strategies.

What you’ll bring:

• 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.
• Proven track record architecting and shipping complex, high-throughput systems in production environments (cloud, edge, or hybrid).
• 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.
• 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.

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
• 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
• 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 [e-mail] 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

#LI-REMOTE

ReqID: R2805

Hiring Ranges:

$216,000 - $288,000 USD

$199,000 - $265,000 USD

$184,000 - $245,000 USD

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