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Senior Software Engineer, Firefox Security - Mozilla - Remote - Global

Senior Software Engineer

Posted: July 18, 2026
Posted today
Last seen in crawl: July 18, 2026 (1d ago)
Estimated Expiry: August 22, 2026
Remoteness
Role & Management
Role Level:Mid-Level
Job Type
Required Languages

Job Description

Mozilla is hiring a Senior Software Engineer, Firefox Security in Remote Germany, focusing on advancing Firefox's security architecture, cryptography, web platform security features, and improving browser reliability, performance, and resource efficiency. The role involves collaborating on security initiatives, participating in technical design, and contributing to security standards and protocols. Candidates should have strong software engineering and security fundamentals, experience with complex software systems, debugging skills, and familiarity with web technologies and Rust. The position offers benefits like bonuses, health coverage, retirement contributions, wellness days, paid parental leave, and professional development budgets.

Company Information

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Technology
Current open roles at Mozilla on JobCrawls
LocationActive listings
Remote Finland46
Remote Germany44
Remote Netherlands43
Remote UK42
Remote France41
Remote Belgium41
Remote Spain40
Remote Sweden38
Remote Poland35
Remote Canada32
Remote US19
Remote - Global15
Remote - France6
Remote - Spain6
Remote - Netherlands6
Remote - Finland6
Remote - Poland6
Remote - Sweden6
Remote - Belgium6
Remote - Germany6
Remote Denmark6
Remote New Zealand5
Remote Australia5
Remote - Canada5
Remote - UK5
Remote - US2
Current role mix at Mozilla on JobCrawls
Role typeActive listings
Software Engineer51
Localization Technical Program Manager2
Product Manager2
Security Engineer1
Head of Global and Strategic Intelligence1
Product Director1
Senior Software Engineer1
Application Engineer1
Engineer1
Data Scientist1
Machine Learning Engineer1
Grassroots Engagement Director1
Fundraising Strategist1
Quantitative User Researcher1
Social Media & Content Strategist1
Current role-level mix at Mozilla on JobCrawls
Role levelActive listings
Mid-Level17
Senior10
Mid-level1

Mozilla appears in 512 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.

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