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

> Remote · United Kingdom · Staff · Software engineering · open. Source: https://alderhq.app/jobs/greenhouse%3Amozilla%3A8324517 (read 2026-11-07).

## Facts (observed)

- Company: [Mozilla](https://alderhq.app/companies/mozilla)
- Location text: Remote UK; Remote
- Where it can be done from (inferred): Remote · United Kingdom (evidence: "Location: Remote UK; Remote")
- Posted: 2026-10-26 (12 days ago)
- First seen by alder: 2026-11-02 · last verified: 2026-11-04
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://job-boards.greenhouse.io/mozilla/jobs/8324517
- Skills listed (inferred): C++

## Pay and sponsorship

- Posted pay: not posted
- Market band for similar posted roles (United Kingdom, n 33): p25 £115k, median £137k, p75 £188k

## Description (the employer's text)

### 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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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Amozilla%3A8324517 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.