Mozilla

About the Company

A lot of companies say they're "mission-driven." Our unique corporate structure guarantees that every decision we make upholds our mission: to ensure the internet remains open and accessible. Beholden to neither shareholders nor investors, Mozilla Corporation is wholly owned by the not-for-profit Mozilla Foundation.

Along with our communities of 20,000+ contributors and collaborators, Mozilla Corporation's staff designs, builds, and distributes software that allows people to enjoy the internet on their own terms. Our flagship product -- the Firefox browser -- has expanded into a family of products that protects users and alerts them of risks, safeguards passwords and provides a secure VPN (with more to come).

By maintaining a safe, open internet we're helping humanity, while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.

Listed Jobs

Company Name

Mozilla

Job Title

Senior Sofware Engineer (Localization)

Job Description

Job Title: Senior Software Engineer (Localization) Role Summary: Lead the development and maintenance of localization infrastructure and tools to enhance global accessibility and adaptability of Mozilla products. Collaborate on internationalization, localization standards, and cross-functional projects impacting Firefox and other services. Expectations: - Drive the architecture and feature development for localization systems (e.g., Pontoon, moz-l10n). - Implement Python/JavaScript libraries and tools to support internationalization and localization workflows. - Shape technical strategies for adapting Firefox features to diverse languages, regions, and cultural contexts. - Engage with open-source communities and global localizer volunteers to advance localization standards. - Ensure seamless collaboration across distributed teams and technical/non-technical stakeholders. - Advocate for Unicode MessageFormat and other internationalization standards in product design. Key Responsibilities: - Develop/iterate open-source localization tools, including back-end (Django) and front-end systems. - Enhance Firefox codebase for language-specific adaptability (e.g., plurals, text direction). - Mentor peers and guide technical decisions during architectural reviews. - Analyze and resolve technical barriers to multilingual product accessibility. - Foster collaboration with volunteer contributors to refine localization processes. Required Skills: - Proficiency in Python, JavaScript, and modern web development (APIs, frameworks). - Strong understanding of i18n/l10n concepts, tools (e.g., Pontoon, message-format libraries). - Experience with internationalization standards (Unicode, ICU) and cross-browser compatibility. - Expertise in distributed team workflows (Git, issue tracking, CI/CD). - Excellent communication to bridge technical/non-technical stakeholders. Required Education & Certifications: - Bachelor’s degree in Computer Science, or equivalent experience. - Demonstrated experience with open-source development practices is preferred.

Belgium

Remote

Senior

06-11-2025

Company Name

Mozilla

Job Title

Senior Software Engineer - Engineering Workflow and CI

Job Description

Paris, France

Remote

Senior

06-11-2025

Company Name

Mozilla

Job Title

Backend Engineer, Websites & Marketing Technology

Job Description

**Job title** Backend Engineer, Websites & Marketing Technology **Role Summary** Design, develop, and maintain backend services that power high‑traffic marketing websites (mozilla.org, firefox.com) and associated marketing technology infrastructure on Google Cloud Platform. Work collaboratively with cross‑functional teams to deliver scalable, reliable, and privacy‑respecting web experiences. **Expectations** * Deliver performant, automated, and reliable backend solutions. * Engage in code reviews, documentation, and knowledge sharing. * Communicate effectively in a distributed, asynchronous environment. **Key Responsibilities** 1. Build and maintain Python/Django services for marketing sites. 2. Implement performance optimizations, automation, and internationalization features. 3. Deploy and manage services on GCP using CI/CD pipelines. 4. Write clean, well‑tested code and maintain high code quality standards. 5. Participate in code reviews and foster a collaborative team culture. 6. Investigate and adopt new technologies to enhance system efficiency. 7. Contribute to operational documentation and best‑practice guidelines. **Required Skills** * Backend web development for high‑traffic or large‑scale sites. * Proficiency in Python and Django. * Cloud infrastructure experience (GCP or AWS) and modern deployment pipelines. * Version control with Git/GitHub. * Testing, monitoring, and automation best practices. * Strong written and verbal communication in English. * Ability to collaborate in a remote, globally distributed team. **Required Education & Certifications** * Bachelor’s degree in Computer Science, Software Engineering, or related field (or equivalent practical experience). No specific certifications required.

Paris, France

Remote

06-11-2025

Company Name

Mozilla

Job Title

Firefox OS Integration Engineer, Crash Reporting

Job Description

**Job Title**: Firefox OS Integration Engineer, Crash Reporting **Role Summary**: Ensures Firefox OS integration compatibility with macOS, focusing on crash reporting systems. Develops and maintains code for crash detection, testing, and error reporting to enhance product quality. Collaborates with distributed teams to resolve low-level OS and codebase issues. **Expectations**: Expertise in Rust/C++ for low-level systems programming; familiarity with macOS OS primitives and stack walking/post-mortem analysis. Requires problem-solving skills to analyze crash data and document technical solutions. **Key Responsibilities**: - Design, test, and implement crash reporting fixes and features for Firefox on macOS. - Maintain crash detection systems interacting with low-level OS components. - Analyze crash data to identify root causes and improve reliability. - Collaborate with distributed teams via code reviews, planning, and technical discussions. - Document design decisions to ensure team alignment and knowledge sharing. **Required Skills**: - Proficiency in Rust and/or C++ (2+ years professional experience). - Experience with macOS low-level OS programming or debugging. - Knowledge of stack walking, post-mortem analysis, or compiler/debugger development. - Strong problem-solving and debugging capabilities. - Effective written/verbal communication and collaboration in remote teams. **Required Education & Certifications**: - Degree in Computer Science or equivalent technical experience. - No additional certifications specified.

Paris, France

Remote

10-11-2025