Jobs / United States / mozilla

mozilla

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

Location unlisted Posted today

View original listing ↗ Tailor my CV first Source: Arbeitnow

Listed on Arbeitnow: the application continues on their site, which links to the employer. Optional: we can tailor a CV and cover letter for this job from your real experience first (the first one is free).

Sponsorship verdict

Sponsorship possible

One solid signal, not two. Worth applying, and worth asking about sponsorship early.

  • Employer is on a government sponsor recordThe US Department of Labor certified 2 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first.
  • The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
  • No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area.
  • What mozilla paid sponsored hires in similar roles1 certified filing for “Senior Director of Machine Learning, Firefox” (Computer and Information Systems Managers) in WA: $413k–$413k, median $413k.
  • Confirmed live todayWhen a source last listed this job as open.
Details and sources
Employer is on a government sponsor record
The US Department of Labor certified 2 H-1B/E-3 labor condition applications for this employer between Oct 2025 and Jun 2026 (latest Jun 2026) — the step every H-1B hire needs first. Source: LCA disclosure data (US Department of Labor (OFLC)).
No salary bar for this route
H-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
What mozilla paid sponsored hires in similar roles
1 certified filing for “Senior Director of Machine Learning, Firefox” (Computer and Information Systems Managers) in WA: $413k–$413k, median $413k. Most were filed at wage level IV (100%) — 4 lottery entries, ≈61% projected selection odds for cap-subject employers. Source: US Department of Labor LCA disclosure data (Oct 2025 – Jun 2026).

US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).

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.

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. Find Jobs in United Kingdom on Arbeitnow

View original listing ↗