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Mozilla, a leading tech organization known for its commitment to open-source projects, is seeking a Senior Software Engineer to join its Localization Team. This role is entirely remote, allowing candidates from various countries—including Belgium, Canada, Germany, Spain, Finland, and the Netherlands—to apply. The Localization Team plays a crucial role in managing the infrastructure that supports localization across all Mozilla products and services. In this position, you will contribute to various localization projects, including enhancing Mozilla’s Django-based Translation Management System, Pontoon, and developing open-source libraries like moz-l10n.
As a Senior Engineer, you will be responsible for various tasks that revolve around improving the localization and internationalization features of Mozilla’s products. Your primary responsibilities will include:
Developing and maintaining Python and JavaScript libraries and tools that support Mozilla’s localization infrastructure.
Collaborating with other engineers and program managers to design and implement new features in the Pontoon system, both on the front-end and back-end.
Improving internationalization within the Firefox codebase, facilitating language and region adaptability.
Engaging in discussions about localization and internationalization standards to influence Mozilla's position in these matters.
Supporting Mozilla’s localization efforts by engaging with the community of volunteer developers and localizers.
Collaborating effectively across different time zones, ensuring smooth interaction with teammates and internal clients.
To qualify for this position, candidates must have:
Strong experience in developing and maintaining web applications using Python and JavaScript.
A solid understanding of web technologies, APIs, and modern development workflows.
Familiarity with internationalization (i18n) and localization (l10n) concepts, tools, or workflows.
Excellent communication skills, capable of bridging technical and non-technical roles.
The ability to collaborate effectively in a distributed team environment.
In addition to the core requirements, bonus qualifications that may enhance your application include:
Fluency in another language, showcasing an understanding of linguistic diversity including grammar, plurals, text direction, and cultural conventions.
Experience participating in open-source development and community collaboration.
Programming proficiency in languages such as Rust and C++.
Mozilla values diversity and seeks to create an inclusive environment where everyone can thrive. The company emphasizes the importance of:
Welcoming differences in perspectives and backgrounds.
Being relationship-minded and fostering strong working connections.
Practicing responsible participation, ensuring accountable engagement.
Demonstrating grit and commitment in overcoming challenges and delivering quality work.
As part of the Mozilla team, you can expect:
Competitive performance-based bonuses, ensuring that employees share in the organization’s success.
Comprehensive medical, dental, and vision coverage.
Generous retirement contributions with immediate vesting strength.
Quarterly wellness days where the entire staff pauses together to focus on well-being.
A day off for personal celebrations such as birthdays, alongside country-specific holidays.
A one-time stipend for setting up your home office, along with an annual budget for professional development.
Access to a quarterly well-being stipend to support overall health and wellness.
Considerable paid parental leave and an employee referral bonus program.
Additional benefits vary by country, including life insurance and disability benefits.
Interested candidates can apply to join Mozilla as a Senior Software Engineer specializing in Localization through the job listing on We Work Remotely. This role presents an excellent opportunity for tech professionals passionate about improving software accessibility on a global scale. If you possess the necessary skills and values aligned with Mozilla’s mission, consider applying today to be part of a team dedicated to supporting localization and enhancing user experience across diverse languages and cultures.
This job offer was originally published on weworkremotely.com
February 20, 2026
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