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 exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and restricted. We are looking for a Senior Software Engineer to support the Privacy Team to advance the Firefox Web Platform. Are you passionate about Privacy Protections and the Open Web? Do you want to ship software to a large user base? Do you want to advance current browser architecture to make the web a safer place for users? 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. Implement Privacy-improving, anti-tracking and threat intelligence protection into the Firefox web browser to mitigate user tracking and phishing. Implement architectural improvements into Gecko, the browser engine underlying Firefox. Build performant, low-latency, and maintainable C++, JavaScript and Rust code Bachelor's degree in computer science, engineering, or a related program; At least 4 years of experience with programming in C++ and Rust, with a strong background in memory safety, multi-threaded system architecture, or raw data stream manipulation. Proven ability to onboard quickly, deliver and improve complex software projects.



Proven track record of independently scoping and landing complex features within tight release windows. Experience working within the browser space (Gecko, Chromium, WebKit) or web engine runtime abstractions. Deep understanding of web architecture, the privacy/security model of the web, and client-side data structures. Proficiency with Python and SQL. Generous performance-based bonus plans to all eligible employees
- we share in our success as one team 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 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. Remote Spain #

📌 Senior Software Engineer (España)
🏢 Mozilla
📍 España