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:
addons.mozilla.org (AMO) is the foundation of the Firefox add-ons ecosystem. It’s a showcase for developers to publish and grow their extensions, and a place of discovery for millions of users who customize Firefox to make it their own. Behind the scenes are the DevHub which enables developers to manage their extensions. To manage the ecosystem there are a series of Reviewer tools and automated moderation systems.
As a Senior Software Engineer - Operations, you’ll bring a passion for crafting resilient systems that accelerate our review and operations team to provide a first-class experience for Add-on developers. You’ll work closely with engineers, reviewers, developer relations, and Add-ons leadership to turn ideas into polished features, modernize the platform and its architecture, and see your work reach millions of people around the world.
What you’ll do:
- Deliver major features and architectural improvements across the Add-ons stack, including automated moderation pipelines, Reviewer tools, and DevHub.
- Create robust observability systems and data-backed insights.
- Provide peer feedback, share knowledge and help others grow.
- Improve platform reliability through deployments, monitoring, and incident response.
- Help keep the platform safe and trustworthy, with attention to security and user trust.
- Step in to resolve issues impacting users and developers, from small bugs to larger incidents.
- Collaborate with designers, product managers, QA, and community contributors to deliver end-to-end improvements.
- Contribute in the open through pull requests, code reviews, and discussions.
- Work on:
- Full stack development: React/TypeScript frontends, Django backend, MySQL datastore.
- Platform reliability: deployments, monitoring, and incident response on Google Cloud.
- Feature development: submission flows, trust and safety signals, DevHub and Reviewer tools modernization.
- Ecosystem moderation: abuse report management, policy compliance, and ecosystem safety.
- Open collaboration: We work in the open, with contributions from Mozilla staff and community members.
What you’ll bring:
- Experience building modern web applications.
- Strong experience with Python/Django or similar backend frameworks.
- Understanding of web security principles and practices.
- Strong collaboration and communication skills in a distributed team environment.
- Adept at navigating ambiguity, exploring solutions, and shaping direction in new problem spaces.
- Commitment to our values:
- Welcoming differences
- Being relationship-minded
- Practicing responsible participation
- Having grit
Bonus points for:
- Experience in building automated security systems.
- Exposure to cloud infrastructure (Google Cloud or similar).
- Contributions to open source projects.
- Experience with policy-compliant ecosystem moderation tools.
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 [email protected] 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: D
#LI-REMOTE
Req ID: R3023
Hiring Ranges:
Skills Required
- Experience building modern web applications.
- Strong experience with Python and Django or similar backend frameworks.
- Experience with React and TypeScript frontends.
- Experience with MySQL or relational datastores.
- Experience with Google Cloud or similar cloud infrastructure and platform reliability (deployments, monitoring, incident response).
- Understanding of web security principles and practices.
- Strong collaboration and communication skills in a distributed team environment.
- Ability to contribute and collaborate in open source projects and public repositories.
- Experience building automated security systems.
- Experience with policy-compliant ecosystem moderation tools.
Mozilla Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Mozilla and has not been reviewed or approved by Mozilla.
-
Healthcare Strength — Health coverage is fully employer‑paid in the U.S. and Canada, with generous coverage noted in most other countries. Mental‑health care access, including therapy and coaching, is emphasized.
-
Parental & Family Support — Paid parental leave is described as substantial for both childbearing and non‑childbearing parents in the U.S. and Canada. Family‑friendly policies extend to dependent healthcare coverage.
-
Strong & Reliable Incentives — Performance‑based bonus plans are offered to all regular employees, with individual targets and quarterly opportunities. This cash‑oriented model provides predictable, company‑wide incentive structures.
Mozilla Insights
What We Do
A lot of companies say they’re “mission-driven.” Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible. Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation. Along with our communities of 20,000+ contributors and collaborators, Mozilla Corporation’s staff designs, builds, and distributes software that allows people to enjoy the internet on their own terms. Our flagship product — the Firefox browser — has expanded into a family of products that protects users and alerts them of risks, safeguards passwords and provides a secure VPN (with more to come). By maintaining a safe, open internet we're helping humanity, while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.
