New Products Principal Engineer

1 Month ago • 10 Years + • Product Management

Job Summary

Job Description

The New Products team at Mozilla is building a browser-automation stack for AI agents. As a Principal Software Engineer, you will be responsible for setting the technical vision, architecting the platform, and writing production code alongside the team. You will guide a small team of engineers and deliver core libraries, services, and tooling. This role involves defining technical roadmaps, writing high-performance code, designing distributed systems, leading and mentoring the engineering team, and collaborating with product, design, and developer-relations teams. You will also communicate technical trade-offs to various stakeholders.
Must have:
  • 10+ years of software engineering experience.
  • Expert proficiency in Go, Ruby, Python, or TypeScript/JavaScript.
  • Proven track record of shipping complex systems.
  • Deep understanding of browser internals and automation frameworks.
  • Experience with AI/ML workflows or agent frameworks.
  • Focus on code quality and operational excellence.
  • Exceptional communication skills.
Good to have:
  • Prior experience as a CTO, Principal Engineer, or Staff+ engineer.
  • Experience building production systems in browser automation, AI tooling, or developer infrastructure.
  • Knowledge of privacy-preserving technologies.
  • Experience optimizing build systems and WebAssembly pipelines.
  • Public speaking or writing history.
Perks:
  • Generous performance-based bonus plans.
  • Rich medical, dental, and vision coverage.
  • Generous retirement contributions.
  • Quarterly all-company wellness days.
  • Country-specific holidays and birthday off.
  • One-time home-office stipend.
  • Annual professional development budget.
  • Quarterly well-being stipend.
  • Considerable paid parental leave.
  • Employee referral bonus program.

Job Details

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu.

To learn more about our Hiring Range System, please click this link.

 

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. 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 New Products team at Mozilla is building a browser-automation stack for AI agents. Our mission is to make it effortless for developers to integrate fast, reliable web interactions into their agentic applications.

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:

  • Technical Strategy & Architecture: Define and communicate the long-term technical roadmap for our browser-automation stack, balancing rapid iteration with long-term maintainability and scalability.
  • 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.
  • 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 to 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.

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

#LI-REMOTE

ReqID: R2805

Similar Jobs

Domo - Manager, Consulting

Domo

Pune, Maharashtra, India (On-Site)
2 Months ago
Qualcomm - GPU Research Engineer

Qualcomm

Santa Clara, California, United States (On-Site)
1 Month ago
Netflix - Creative Strategist, Product Discovery & Promotion - SEA

Netflix

Bangkok, Bangkok, Thailand (On-Site)
2 Months ago
Rippling - Senior Staff Software Engineer - Data Products

Rippling

San Francisco, California, United States (On-Site)
7 Months ago
Axon - Order Management Analyst

Axon

Sterling, Virginia, United States (On-Site)
2 Weeks ago
Illumina - Director, Software Technical Product Management

Illumina

San Diego, California, United States (Hybrid)
1 Month ago
Match Group - Product Manager II, Notifications

Match Group

West Hollywood, California, United States (Hybrid)
4 Weeks ago
Electronic Arts - Senior Product Manager - EA Sports FC

Electronic Arts

Vancouver, British Columbia, Canada (Hybrid)
1 Month ago
Scanline VFX - Digital Production Manager

Scanline VFX

Seoul, South Korea (Hybrid)
4 Years ago
Paytm - Product Management - Product Manager - App Product

Paytm

Noida, Uttar Pradesh, India (On-Site)
1 Month ago

Get notifed when new similar jobs are uploaded

Similar Skill Jobs

luxsoft - Frontend Developer

luxsoft

Bucharest, Bucharest, Romania (On-Site)
2 Weeks ago
N-ix - Senior Scrum Master

N-ix

Poland (Remote)
1 Week ago
high radius - Business Development Representative

high radius

Hyderabad, Telangana, India (On-Site)
1 Day ago
Cognite - Director Go-To-Market Systems & AI

Cognite

Austin, Texas, United States (Hybrid)
3 Weeks ago
bytedance - Ethics and Compliance Specialist (Training and Communications)

bytedance

Singapore (On-Site)
2 Months ago
Adyen - Senior Commercial Business Manager

Adyen

London, England, United Kingdom (On-Site)
2 Weeks ago
Gameopedia - Account Executive

Gameopedia

Lillestrøm, Akershus, Norway (On-Site)
1 Month ago
Rippling - Account Manager - Strategic, Growth & Retention (HR Services Channel)

Rippling

San Francisco, California, United States (Hybrid)
2 Months ago
Tide - Senior Product Marketing Manager

Tide

Berlin, Berlin, Germany (Hybrid)
2 Months ago
Paytm - Product Operation - Assistant Manager - Lending

Paytm

Noida, Uttar Pradesh, India (On-Site)
1 Month ago

Get notifed when new similar jobs are uploaded

Jobs in United States

Nintendo - Assistant Art Director

Nintendo

Redmond, Washington, United States (Hybrid)
1 Year ago
CAE - Program Manager

CAE

Binghamton, New York, United States (On-Site)
2 Weeks ago
Nordson Corporation - Senior Specialist, Trade Compliance (Corporate Imports)

Nordson Corporation

Amherst, Ohio, United States (On-Site)
2 Months ago
Sonar Source - Payroll Specialist

Sonar Source

Austin, Texas, United States (On-Site)
3 Months ago
Kavalirio - AVP, Training & Development Facilitator

Kavalirio

Santa Rosa, California, United States (On-Site)
3 Weeks ago
Blue wire software - Assistant Manager

Blue wire software

Sparta, Wisconsin, United States (On-Site)
1 Week ago
Next Level Business Services - Network Engineer

Next Level Business Services

New York, New York, United States (On-Site)
8 Months ago
Epic Games - Principal Data Analyst

Epic Games

Cary, North Carolina, United States (On-Site)
2 Months ago
Crunchyroll - Principal Software Engineer, Ecosystem Engineering

Crunchyroll

San Francisco, California, United States (Hybrid)
1 Month ago
Blinkhealth - Bilingual Vietnamese - Customer Support Specialist

Blinkhealth

Chesterfield, Missouri, United States (On-Site)
1 Month ago

Get notifed when new similar jobs are uploaded

Product Management Jobs

GoMotive - Senior Product Manager, Safety

GoMotive

India (Remote)
2 Months ago
luxsoft - Production Application support

luxsoft

Singapore (On-Site)
1 Month ago
hogarth - Image Content Producer

hogarth

Sunnyvale, California, United States (Hybrid)
1 Month ago
lifechruh - Senior Product Manager

lifechruh

Edmond, Oklahoma, United States (On-Site)
2 Months ago
WebTech Corporation - Production Operator

WebTech Corporation

Greensburg, Pennsylvania, United States (On-Site)
1 Month ago
Aristocrat - Senior Associate Product Manager

Aristocrat

Barcelona, Catalonia, Spain (Hybrid)
3 Weeks ago
Scopely - Lead Product Manager, Economy - Monopoly GO!

Scopely

Barcelona, Catalonia, Spain (Remote)
6 Months ago
WebTech Corporation - Production Supervisor - Radiator Department

WebTech Corporation

Kansas City, Missouri, United States (On-Site)
1 Month ago
Flow - Product Operations & Management Lead

Flow

Riyadh, Riyadh Province, Saudi Arabia (On-Site)
1 Month ago

Get notifed when new similar jobs are uploaded