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

Mozilla Corporation · VPN & Proxy Services · Consumer & Utility Software · C++ · 3 days ago

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Salary

≈ $125k – $206k per year (Estimated)

Location

Remote (United Kingdom)

Seniority

Staff

Employment

Contractor

Confirmed on the employer's own hiring board on Oct 29, 2026. First seen by Alion on Oct 26, 2026. Mozilla Corporation scores A on the Alion truth index.

Overview

Company

Impact

Profile match

Mozilla Corporation

Mozilla Corporation is the commercial subsidiary of the non-profit Mozilla Foundation, created in 2005 to develop and distribute Firefox and related products. It is unusual in structure: profits flow back to the foundation rather than to shareholders, and the great majority of revenue has historically come from a single search default agreement, most recently with Google. Headquartered in Mountain View with a largely distributed workforce, it has been trying to reduce that dependence through advertising products, a virtual private network, the data removal service Monitor and its Anonym advertising measurement business.

mozilla.org · HQ: Mountain View, United States · VPN & Proxy Services · Consumer & Utility Software · 1001-5000 employees · Est. 2005

Tech stack of Mozilla Corporation

Backed by Trinity Ventures, UpWest, Yegor256

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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