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:




Firefox developers land code every day to delight users with new features and improve product performance and security. Every day, developers and managers use our team’s applications to develop, build, test, and deliver Mozilla’s core products. We are force-multipliers to enable Firefox developers to do their best work.
What you’ll do:
- Improve Firefox development workflows to reduce time spent testing and debugging test failures as well as more integration/automation of workflows
- Work with a geographically-distributed development team
- Mentor other team members and be mentored by more senior team members
- Collaborate with other teams by providing code review and technical direction
- Look at data, make dashboards, identify trends in Firefox development workflow

What you’ll bring:
- Proven Python skills, including building services
- Front-end development experience, including JavaScript proficiency
- Experience with Python frameworks (e.g., FastAPI, Flask, Django), Cloud Services

📌 Senior Software Engineer (España)
🏢 Mozilla
📍 España