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

Mozilla · posted Oct 26, 2026

Open to candidates in United Kingdom

Staff

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What this job asks for

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Must have

  • •Strong C++
  • •Browser-engine codebase experience (ideally Firefox/Gecko)
  • •Database experience
  • •Web standards and Web Platform Tests familiarity
  • •Debugging and optimization in multithreaded codebase
  • •Working in the open (bugs, code review, landing)

Nice to have

  • •Prior contributions to Gecko or major browser engine
  • •Familiarity with standards body and specification process

Tools and technologies

C++

Read the full posting

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.

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