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Senior Fullstack Engineer, Ads

USA flag USA


Posted 12 days ago

Job Type

Full Time


$116k - $203k








  • - Mission/Vision: Mozilla's mission is to make the internet better for people, focusing on privacy and accessibility. The developer's role advances these goals by building privacy-respecting ad technologies.

  • - Key Responsibilities: Develop privacy-preserving ad tech, lead key projects, mentor junior engineers, and serve as an expert on Mozilla’s ad systems.

  • - Growth Opportunities: Exposure to industry-leading privacy-preserving tech, mentorship roles, and opportunity to influence product strategies and solutions.


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.

What is a Senior Software Engineer at Mozilla?

A Senior Software Engineer is the next level from a Software Engineer. At Mozilla, this role can vary, but is typically someone who is largely self directed after work is assigned and is advanced in their domain. They help team members get information they need to be successful while also being the go-to person for peer reviews in their domain. They have a solid understanding of the product strategy and can recommend solutions to critical issues when needed, assist junior engineers in risk management and escalation, and advocate for and implement changes that affect their team. A Senior Software Engineer actively seeks opinions and ideas from their team members, including those with varied experiences and perspectives to improve more collective results.

About this team and role:

We’re growing the Mozilla Ads product team, focused on display advertising in Mozilla products that is privacy-respecting and values-aligned. You will be working on the team responsible for designing, building, and owning the core systems that support advertising in clients (Firefox, MDN, Pocket, Fakespot, etc). You and your team will be the subject matter experts when it comes to advertising, providing guidance and shepherding to various product teams across Mozilla.

What you’ll do:

  • Participate in development of industry leading privacy preserving ad technology.

  • Leverage your understanding of product strategy to break down and deliver on key projects on our roadmap

  • Mentor others by stewarding some of your responsibilities to more junior engineers

  • Be a go-to resource for Mozilla’s ad stack to peers in partner teams

What you’ll bring:

  • 4+ years of overall software engineering experience

  • Proven ability to successfully lead and ship large software projects with speed and quality

  • Experience in working on complex backend and frontend systems at scale

  • Experience in one of the following technologies: Golang, Rust, or Java

  • Experience in one of the following front-end technologies in a professional setting: Javascript, React, or Node.js

  • An interest and ability to work in a distributed team (which requires good asynchronous written communication skills as well as good verbal communication skills)

  • Commitment to our values:

    • Welcoming differences

    • Being relationship-minded

    • Practicing responsible participation

    • Having grit

Bonus Points for:

  • Experience in data privacy

  • Experience in digital advertising or advertising platforms

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 ensure that the internet is 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 and inclusion

Mozilla believes in the value of diverse creative practices and forms of knowledge, and knows diversity, equity and inclusion 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 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: R2486

Hiring Ranges:

US Tier 1 Locations

$137,000—$203,000 USD

US Tier 2 Locations

$126,000—$185,000 USD

US Tier 3 Locations

$116,000—$170,000 USD


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