Sr. Staff Software Engineer, Browser

Mozilla Remote

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Posted 02 Nov 2026

Last seen 02 Nov 2026

Location Remote

Lifecycle fresh

Grade D

Why this grade This listing scored 52/100, which is a D. It lost the most ground on pay transparency. See the breakdown

Freshness 15 / 15 How recently it was posted. Older postings are likelier to be filled or abandoned.
Remote clarity 15 / 15 Whether "remote" means anywhere, or is quietly restricted to one country.
Description depth 14 / 20 How much the posting actually says about the work, measured in characters of real text.
Corroboration 5 / 10 Whether more than one source carries this listing.
Role specificity 3 / 10 Whether the listing is tagged well enough to tell what the role actually is.
Pay transparency 0 / 25 A published salary range, worth more than any other single factor because it is what a candidate cannot find out without applying.

Every figure above is arithmetic over the posting itself — its salary field, its text, its age, its tags and how many sources carry it. How the grades work →

Description review

65/100 HR standards 86/100 Title ↔ description not measured Fit to the official role

Read the marked-up listing →

hn-hiring

(New Products)| REMOTE (US or Canada) | Full-time

Mozilla's New Products group is a small team building new things on top of browser engine technology. We're hiring a hands-on, senior IC to run experiments inside browser engine internals and find out which ideas actually hold up.
What you'd do: design and build experiments in engine subsystems (DOM, layout, accessibility, JS runtime, networking), prototype features that let programs interact with web pages reliably, and measure everything. That means repeatable benchmarks, profiling overhead, and writing up the experiments that didn't work too. You'll use AI tools heavily, but you'll verify what they produce by testing and measuring it.
You likely have: deep experience in at least one browser subsystem, strong C++ or Rust, comfort in a very large codebase, a solid grasp of how the web platform behaves, and a real interest in AI agents and their tooling. Contributions to Gecko, Servo, Blink or WebKit are a big plus.
US: https://job-boards.greenhouse.io/mozilla/jobs/8265116
Canada: https://job-boards.greenhouse.io/mozilla/jobs/8265117

Apply for this role Opens job-boards.greenhouse.io — the employer's own page, as linked by the source that listed this role

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Where this listing came from

02 Nov 2026 Hacker News first sighting

Seen on 1 board over 0 days.