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Mozilla

Contract Staff Software Engineer - (Firefox) C++,Storage Encryption

Remote Canada; Remote Germany; Remote UK
Level
Staff
Work type
Remote

Not stated in the posting: salary, visa.

Open. First seen 20 October 2026.

About the 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.

The team: Firefox HIRES STEADILY

This role is one of 62 open in Firefox. 35 were posted in the last 30 days and the oldest in February: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

C++ (37 of 62), JavaScript (37 of 62), Rust (32 of 62), Python (29 of 62), CI/CD (18 of 62), TypeScript (18 of 62), CSS (17 of 62)

OTHER ROLES ON THIS TEAM

From the team and dates on Mozilla's own job board.

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