You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve the coverage; you will fix tests and/or problems to improve the Gecko correctness.
Contract Staff Software Engineer - (Firefox) C++,Storage Encryption
Canada, Germany, United Kingdom
October 20, 2026
Job description
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.
Available regions
Each region below is open to applicants in that country only. Apply through the link for your region.
Apply now
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You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve the coverage; you will fix tests and/or problems to improve the Gecko correctness.
You will help reduce Firefox’s WebCompat bug backlog by finishing or verifying the diagnosis of the long tail of site-breakage bugs, and by writing interventions or simple fixes (often with AI assistance).
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