Backend Software Engineer, Ads

3+ years of professional software engineering experience

Experience building backend systems using languages such as

Go, Python, or Rust

Familiarity with APIs, service-oriented architectures, and system integrations

Exposure to data pipelines, analytics systems, or ad-tech concepts is a plus, but not required

Some experience working with modern frontend frameworks (such as React) is a bonus

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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.

Build and maintain backend services that support advertising functionality across Mozilla products

Implement APIs, data flows, and integrations between internal systems and external partners used in Ads workflows

Contribute to systems that prioritize correctness, reliability, and scalability in a privacy-conscious environment

Work with product managers, engineers, and cross-functional partners to deliver well-scoped features and improvements

Incrementally take on more complex problems as you develop familiarity with Ads systems and domain concepts

The Ads Engineering organization at Mozilla builds shared infrastructure that supports ethical, privacy-forward advertising across Mozilla’s products. Our work spans backend systems that enable advertising inventory management, forecasting, campaign execution, measurement, and reporting across all Mozilla properties.

As a Backend Software Engineer on Ads Engineering, you’ll contribute to backend services, data integrations, and internal tooling that help operational and business partners work more efficiently and reliably. You’ll work alongside engineers, product managers, and cross-functional stakeholders to deliver well-scoped features and improvements, while learning the domain and growing your impact over time.

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 orientation