Contract Staff Software Engineer - (Firefox) C++,Storage Encryption
Company: Mozilla
Locations: Canada; Germany; United Kingdom
Work arrangement: Remote possible
Employment type: Contract
Experience: 5-10 years
Posted: 2026-10-20
Responsibilities
The role involves implementing storage encryption across the Firefox browser engine and migrating data between schemas. You will also be responsible for writing tests, performing code reviews, and shepherding features through the release cycle.
Requirements
Candidates must have strong C++ skills and substantial experience working with browser-engine codebases like Firefox/Gecko. Experience with databases, web standards, and multithreaded debugging is also required.
Skills
- C++
- Browser-engine development
- Firefox
- Gecko
- Storage encryption
- Database management
- Web standards
- Web Platform Tests
- Multithreaded programming
- Debugging
- Optimization
- Code review
About this role
The role
You will help the Firefox DOM LWS team to implement tasks for Storage Encryption everywhere, helping to drive the in-progress project through to completion .
Responsibilities
Contributing to delivering Storage Encryption Everywhere in Gecko, which may include tasks such as migrating data between schemas, implementing data storage in PBM and integration testing.
Write and pass Web Platform Tests, and add Gecko tests as needed.
Work through code review with the relevant Gecko module owners and iterate to landing.
Surface and help resolve any specification questions the implementation raises.
Shepherd the feature through Nightly, Beta, and Release. Fix correctness, performance issues and regressions.
Definition of done
Ship Storage Encryption Everywhere to release channel. Fix triaged and prioritized issues.
Required qualifications
Strong C++.
Substantial experience in a browser-engine codebase, ideally Firefox/Gecko.
Substantial experience in databases.
Familiarity with web standards and Web Platform Tests.
Strong debugging and optimization in a multithreaded codebase.
Comfort working in the open: public bugs, code review, and upstream landing.
Preferred
Prior contributions to Gecko or another major browser engine.
Familiarity with the relevant standards body and specification process.
About Mozilla
Software Development · 501-1,000 employees · headquartered in San Francisco, CA · founded 2005