Senior Software Engineer (Localization) - Mozilla
Software Engineer
Compensation
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€3,692 - €5,682/month
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Market median: €4,687
Data midpoint (unverified): €4,687
n=4
Posted: April 17, 2026
Posted 43 days ago
Last seen in crawl: May 6, 2026 (24d ago)
Estimated Expiry: May 22, 2026
Remoteness
Required Languages
Job Description
The Localization Team manages infrastructure supporting localization across Mozilla products and services. As a Senior Engineer, contribute to open source libraries, internationalization features, and collaborate with global teams.
Company Information
| Location | Active listings |
|---|---|
| Remote Finland | 46 |
| Remote Germany | 44 |
| Remote Netherlands | 43 |
| Remote UK | 42 |
| Remote Belgium | 41 |
| Remote France | 41 |
| Remote Spain | 40 |
| Remote Sweden | 38 |
| Remote Poland | 35 |
| Remote Canada | 32 |
| Remote US | 19 |
| Remote - Global | 10 |
| Remote - Belgium | 6 |
| Remote - France | 6 |
| Remote - Finland | 6 |
| Remote - Netherlands | 6 |
| Remote - Sweden | 6 |
| Remote - Poland | 6 |
| Remote - Germany | 6 |
| Remote - Spain | 6 |
| Remote Denmark | 6 |
| Remote - Canada | 5 |
| Remote New Zealand | 5 |
| Remote - UK | 5 |
| Remote Australia | 5 |
| Remote - US | 2 |
| Role type | Active listings |
|---|---|
| Software Engineer | 48 |
| Product Manager | 2 |
| Localization Technical Program Manager | 2 |
| Security Engineer | 1 |
| Product Director | 1 |
| Quantitative User Researcher | 1 |
| Senior Software Engineer | 1 |
| Engineer | 1 |
| Social Media & Content Strategist | 1 |
| Head of Global and Strategic Intelligence | 1 |
| Data Scientist | 1 |
| Grassroots Engagement Director | 1 |
| Machine Learning Engineer | 1 |
| Role level | Active listings |
|---|---|
| Mid-Level | 12 |
| Senior | 10 |
| Mid-level | 1 |
Mozilla appears in 507 indexed job postings in JobCrawls' Finland dataset since October 2023. In that historical index, the strongest location signals for this employer are Remote Finland, Remote Germany, and Remote Netherlands.
Data shown is based on historical job postings from our database.
Job Details
Responsibilities
- Contribute to the development of Python and JavaScript libraries supporting localization infrastructure.
- Improve localization and internationalization within Firefox.
- Collaborate on new Pontoon features.
- Support and guide Mozilla’s localization efforts with the community.
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)
Skills & Technologies
PythonJavaScriptWeb technologiesAPIsOpen source development
Education Level
None required24 days ago