Senior Software Engineer (Localization) Job at Mozilla

Senior Software Engineer (Localization)

Mozilla

Location:

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

The Localization Team manages the infrastructure that powers localization across all Mozilla products and services, and supports our global community of volunteer localizers. As a Senior Engineer, you’ll contribute to a range of Mozilla localization projects and technologies — from open source libraries like moz-l10n to Pontoon, our Django-based Translation Management System. You’ll also work on internationalization features that shape the experience of Firefox and other Mozilla products, and have the opportunity to engage with development of standards such as Unicode MessageFormat and DOM Localization.

Job Responsibility:

Contribute to the development of Python and JavaScript libraries (such as moz-l10n) and tools that support Mozilla’s localization infrastructure
Improve localization and internationalization within the Firefox codebase to make features more adaptable and accessible across languages and regions
Collaborate with engineers and program managers to design and implement new Pontoon features
Engage with our community of volunteer developers and localizers to support and guide Mozilla’s localization efforts
Collaborate effectively with teammates and internal clients across regions and time zones

Requirements:

Strong experience developing and maintaining libraries and tools using Python and JavaScript
Solid understanding of web technologies, APIs, and modern development workflows
Experience with open source development practices and community collaboration
Ability to collaborate effectively in a distributed team, across time zones and disciplines
Excellent communication skills, with an emphasis on clarity and working across technical and non-technical roles
Professional fluency in English (written and verbal)
Commitment to our values: Welcoming differences
Being relationship-minded
Practicing responsible participation
Having grit

Nice to have:

Experience with internationalization (i18n) and localization (l10n) concepts, tools, or workflows
Programming experience in Rust and C++
Fluency in another language and understanding of linguistic diversity (e.g., grammar, plurals, text direction, and cultural conventions)

What we offer:

Generous performance-based bonus plans
Rich medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting
Quarterly all-company wellness days
Country specific holidays plus a day off for your birthday
One-time home office stipend
Annual professional development budget
Quarterly well-being stipend
Considerable paid parental leave
Employee referral bonus program
Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
Flexible work environment
Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents)
Reimbursement for professional development (up to $3,000/year)
A work setup including the latest hardware and software of your choice

Additional Information:

Job Posted:
April 05, 2026

Employment Type:

Fulltime

Work Type:

Remote work

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