Staff Site Reliability Engineer, Tools & Systems Remote Spain The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. 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. 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. 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. We are looking for an experienced and versatile software engineer to work on the tools and systems that support Firefox engineering. This is a broad software engineering role spanning internal engineering systems, developer tooling, workflow automation, and the infrastructure required to operate them. We are looking for an engineer with strong software development skills and meaningful experience deploying and operating production systems. Our Cloud Engineering teams provide shared platforms and foundational services,



while engineering teams own the applications and services they run on them. You will also contribute directly to the software, tools, and systems that support Firefox engineering. You will work across projects and technical domains, joining teams or existing efforts when needed and independently taking on problems that require focused ownership. Design, build, deploy, and operate software and systems supporting Firefox engineering. Own complex technical problems end-to-end across software, cloud, and operational layers, improving reliability, performance, observability, and cost efficiency. Work with Firefox engineering, Cloud Engineering, IT, and other teams to solve problems that span technical and organizational boundaries. Use telemetry, metrics, and data analysis to investigate problems and guide engineering decisions. Strong software engineering skills and substantial hands-on experience deploying and operating production systems are core requirements for this role. Strong programming skills in languages such as Python or JavaScript/TypeScript. Experience with C++ or Rust is useful. Experience building and deploying and operating production systems in cloud environments, including utilizing infrastructure as code such as Terraform. Experience across several areas such as CI/CD, containers and orchestration, networking, databases, observability, or developer tooling. Experience using data, telemetry,



and metrics to investigate technical problems and make decisions. You enjoy moving across projects and technical domains, taking ownership of problems and looking for patterns that make the next one easier to solve. You work effectively across disciplines and can translate between software, infrastructure, and operational concerns. You combine hands-on engineering with systems thinking and longer-term technical judgment. 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) Country specific holidays plus a day off for your birthday One-time home office stipend Annual professional development budget 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. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online. 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 s, 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. We do not discri

📌 Staff Site Reliability Engineer, Tools (España)
🏢 Mozilla
📍 España