Senior Engineering Manager, Add-Ons Ecosystem - Remote US

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, and Pocket, a service for keeping up with the best content online. 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 Add-ons organization at Mozilla is responsible for managing an ecosystem that spans from software through policy and security, services for software and content delivery, communications and editorial, all while servicing a large community of developers, enterprise companies and end users.  

Within Add-ons, the “AMO” ( team owns our user and developer facing Add-ons marketplace, the Web Extensions team is responsible for Firefox extensions APIs, the Add-ons Operations team is responsible for operations and security of the Add-ons Ecosystem, and Add-on Community Experience Team ensures the experience of developing and using add-ons is as delightful, rewarding, and engaging as possible.

The Senior Engineering Manager leads the Firefox Add-ons organization. We’re looking for a leader that is passionate about building awesome teams, finding innovative solutions to the unique challenges of an ecosystem, shipping quality software and wanting to make an impact by empowering users to shape their experience on the Internet.

What you’ll do: 

  • Drive initiatives to improve the Add-ons ecosystem and deliver value to users while ensuring the software your team delivers is high quality, highly available, monitored, and maintainable.
  • Communicate your team’s goals, the scope and risks of your projects, and own the delivery of initiatives on clear timelines.
  • Identify, build and iterate on engineering processes that support a high performing team. 
  • Ensure developers are properly supported and empowered throughout the developer lifecycle.
  • Create an inclusive environment which engages and challenges your team members. 
  • Work collaboratively with many teams including Product, UX, QA, Operations, and Data Analysis.

What you’ll bring: 

  • 3+ years of management experience, with experience managing managers, and working across multiple distributed teams.
  • Proven track record in overseeing the development, operations, and strategic execution of a comprehensive ecosystem.
  • Strong communication and ability to develop positive relationships with others, regardless of their rank or role.
  • Passion to resolve problems, manage risk, lead change, and facilitate collaborative decision-making.
  • Proficient with software development practices for triage, prioritization, and execution.
  • Able to hire, mentor, empower, develop, and delegate to geographically distributed team members with different skills from your own.
  • Experience effectively communicating with senior leadership and advocating for engineering priorities.
  • Commitment to our values:
    • Welcoming differences
    • Being relationship-minded
    • Practicing responsible participation
    • Having grit

Bonus points for:

  • Previous experience working with browser extension APIs.
  • Solid understanding of at least one of the following programming languages: JavaScript, Python, C++, or Rust.
  • Experience working in open source environments.

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 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: C


Req ID: R2488

Hiring Ranges:

US Tier 1 Locations$216,000—$317,000 USDUS Tier 2 Locations$199,000—$292,000 USDUS Tier 3 Locations$184,000—$270,000 USD Apply