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Posted 7 d ago
Contract Staff Software Engineer - (Firefox) C++,Storage Encryption
Posted by Mozilla on 26 October 2026, 7 days ago. Still on their Greenhouse board when we checked 53 min ago. Half of Mozilla's roles come down within 43 days.
What the posting is about
Contribute to Firefox DOM LWS team, implement Storage Encryption, write and pass Web Platform Tests, work through code review, and shepherd feature through channels. Requires strong C++, browser-engine experience, and familiarity with web standards.
Read out of the posting
LevelNot stated
Experience asked5+ years
EmploymentContract
LocationRemote UK
RemoteYes
Visa sponsorshipNot stated
SalaryNot published, and most postings do not
Posted2026-10-26
Found viagreenhouse, direct from their system
We had it within the hour it went up.
The posting, as the company wrote it
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.
Copied from Mozilla’s own board, not rewritten.
Also open at Mozilla
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