Live opening · Posted 6 days ago

Staff Software Engineer-Bug Burndown

Thunderbird · Canada, England, United Kingdom (Remote)
Linkedin Yes
JobBeeper subscribers received an alert for this role.

At a glance

The key details from the original listing.

Posted 6 days ago
CompanyThunderbird
LocationCanada, England, United Kingdom (Remote)
Work modeYes
SkillsJavaScript
SourceLinkedin
ListedPosted 6 days ago

Your early-applicant advantage

Live timing from JobBeeper.

Live data
11 min from Linkedin publishing this role to us finding it
8 min median time from a role going live to a subscriber being told
6 hours subscribers had this role before this page existed
64,713 roles found in the last 24 hours — the newest are not on this site yet
Start your free trial →

About the role

Description supplied by the original job listing.

Help us improve your Mozilla experience
In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy.
Cookie settings
Products
Firefox browsers
Mozilla VPN
Mozilla Monitor
Firefox Relay
MDN Plus
Thunderbird
0DIN
Tabstack
Otari
All products
About us
Our Mission
About Mozilla
The Mozilla Manifesto
Get Involved
Blog
Our Work
Mozilla Foundation
Mozilla.ai
Mozilla Ventures
Mozilla Advertising
Mozilla Builders
Mozilla New Products
Mozilla Careers
Menu
Overview
Diversity and Inclusion
Benefits
Teams
Locations
Job Listings
Staff Software Engineer-Bug Burndown
at Mozilla Corporation
Team: Firefox Locations: Remote Canada; Remote Germany; Remote UK
Remote Canada; Remote Germany; Remote UK
You will help reduce Firefox’s WebCompat bug backlog by finishing or verifying the diagnosis of the long tail of site-breakage bugs, and by writing interventions or simple fixes (often with AI assistance). You turn a large queue of reported breakages into diagnosed, actionable, or fixed bugs.
Responsibilities
Finish diagnosing, or verify the diagnosis of, long-tail WebCompat bugs.
Write WebCompat interventions where appropriate.
Write simple fixes (AI-assisted) and land them.
Reproduce and triage incoming site-breakage reports.
Required Qualifications
Solid web development (HTML, CSS, JavaScript) and comfort debugging real-world site breakage.
Fluent with browser devtools and cross-browser diagnosis.
Comfortable using AI tooling to speed up diagnosis and fixes.
Preferred
Gecko knowledge is a strong plus (but can be taught).
Prior WebCompat or web-standards experience.
Remote Canada; Remote Germany; Remote UK
Applicant Privacy Notice
Why Mozilla?
At Mozilla, we’re serving humanity—by maintaining a safe, open internet—while also helping the individual humans employed here to reach their personal and professional goals. With a relatively small team serving hundreds of millions of people, a culture of exploration, and a commitment to mentorship, opportunities abound to learn and grow at Mozilla.
Our values drive our actions
Purpose is built into our work, with our mission driving every decision
We challenge assumptions, the status quo, ourselves, and each other
We are transparent: in our code, our business partnerships, and our everyday interactions
We seek out people from diverse backgrounds and with perspectives different from our own
We pair purpose with performance and put people ahead of profit
Our impact is global
1000+ paid staff from over 30 countries
Thousands of volunteer contributors across six continents
2 global offices: Berlin and Toronto
9 coworking space locations: San Francisco, San Mateo, London, Paris, Portland, Tulsa, Vancouver, Chicago, and Bellevue
Hundreds of home offices globally
Our benefits are world-class
Flexible work environment (majority of Mozillians work remotely)
Industry-leading paid parental leave (up to 26 weeks of fully paid leave for childbearing parents and up to 12 weeks for non-childbearing parents)
Reimbursement for professional development (up to $3,000/year)
A work setup including the latest hardware and software of your choice
Company
Leadership
Press Center
Careers
Merch Store
Contact
Support
Product Help
File a Bug
Localize Mozilla
Security
Developers
Developer Edition
Enterprise
Tools
MDN
Firefox Release Notes
Follow @Mozilla
Bluesky (@mozilla.org)
Instagram (@mozilla)
LinkedIn (@mozilla)
TikTok (@mozilla)
Spotify (@mozilla)
Follow @Firefox
Bluesky (@firefox.com)
Instagram (@firefox)
YouTube (@firefoxchannel)
TikTok (@firefox)
Donate
All languages Language English (Canadian) English (British) English
Donate to the not-for-profit Mozilla Foundation.
Portions of this content are ©1998–2026 by individual mozilla.org contributors. Content available under a Creative Commons license.
Website Privacy Notice
Cookies
Legal
Community Participation Guidelines
About this site

Work arrangement
Yes

Get JobBeeper Mobile App

Never miss a job opening! Get instant job alerts on your phone.

Subscribers see fresh openings within minutes. Download the JobBeeper App on Google Play to get real-time push notifications and apply before anyone else.

⚡ Instant Push Alerts 🎯 Tailored Filters 🚀 Direct Employer Links
GET IT ON Google Play

More openings worth a look

Recently tracked roles with full details and direct application links.

6 roles
Good roles move before most people even see them. Tell JobBeeper what you want and get fresh matches delivered in minutes.
Start your free trial →
⚡ Get fresh job alerts 📱 Get App