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mozilla

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

Remote (Canada, Germany, UK) · Remote · UK only Posted today

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Where you can work from

United Kingdom only

Based on the listing's location: Remote (Canada, Germany, UK).

The company's headquarters is not the same as where you may work from. Visa sponsorship only matters if you would relocate; see below.

Visa sponsorship, if you would relocate

Sponsorship verdict

No sponsorship evidence yet

No government record and no wording either way. Not a refusal: ask the recruiter.

  • No government sponsor record hereThis employer posted directly and does not match a government sponsor register.
  • The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
  • Can’t check pay against the visa rulesNo salary stated. UK Skilled Worker visa needs at least £41,700 a year (new-entrant (under 26, recent Student/Graduate visa) or STEM PhD: £33,400).
  • Confirmed live todayWhen a source last listed this job as open.
Details and sources
Can’t check pay against the visa rules
No salary stated. UK Skilled Worker visa needs at least £41,700 a year (new-entrant (under 26, recent Student/Graduate visa) or STEM PhD: £33,400). Source: https://www.gov.uk/skilled-worker-visa/when-you-can-be-paid-less, rules effective 2025-07-22.

A verdict summarises public evidence. It is not legal advice and never a guarantee: the employer and the immigration authority decide. Sign in to factor in where you can already work.

Before you apply

Sponsorship unknown

No register record and no sponsorship wording in the posting. Worth asking the employer before investing significant time.

These come from the posting’s own wording. Read the original listing to confirm. See better-fit alternatives →

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.

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