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Mozilla

49 jobs

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49 jobs Posted Sort

Senior Contract Software Engineer (C++ / JavaScript, Firefox (Browser Engine))

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Senior contract engineer on Firefox's DOM Core team, improving Session History test coverage and Gecko correctness using C++ and JavaScript. Day-to-day work includes writing Web-Platform and mochitests, fixing bugs, and iterating through code review with Gecko module owners.

Senior Contract C++ / JavaScript Software Engineer (Browser Engine)

NewBe an early applicant RemoteEuropeFull-timeSenior

Senior contract engineer on Firefox's DOM Core team improving Session History correctness in Gecko. Writes C++ and JavaScript tests (Web Platform Tests, mochitests), fixes bugs, and works through public code review to land changes upstream.

Contract Staff Software Engineer (Bug Burndown)

NewBe an early applicant RemoteUKFull-timeStaff

Reduces Firefox's WebCompat bug backlog by diagnosing site-breakage reports, writing interventions and simple AI-assisted fixes, and triaging incoming breakages. Day-to-day work centers on HTML, CSS, JavaScript, browser devtools, and cross-browser diagnosis; Gecko and WebCompat experience are a plus.

AI CSS HTML JavaScript

Senior Software Engineer (Firefox Security)

NewBe an early applicant RemoteEuropeFull-timeSenior

Designs and ships security and hardening features for Firefox enterprise users, including privilege isolation, cryptographic protocols, WebPKI, and security-sensitive web APIs. Works in C/C++ and Rust across multithreaded, cross-platform codebases.

API C++ CSS HTML JavaScript +1 skills

53K – 71K €

Senior Software Engineer (Firefox Security)

NewBe an early applicant RemoteUKFull-timeSenior

Senior Software Engineer at Mozilla designing and shipping security and hardening features for Firefox, including privilege isolation, cryptographic protocols, WebPKI, and security-sensitive web APIs, using C/C++ and Rust in a large cross-platform codebase.

API C++ CSS HTML JavaScript +1 skills

Strategic Account Manager, Firefox Enterprise (DACH)

NewBe an early applicant RemoteEurope

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

Account Executive AI SIEM

Strategic Account Manager, Firefox Enterprise

NewBe an early applicant RemoteEurope

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

Staff Technical Support Manager, Enterprise

NewBe an early applicant RemoteEuropeStaff

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

AI Analytics Authentication Automation Corrective Action +6 skills

Staff Solutions Engineer

NewBe an early applicant RemoteEuropeStaff

Why Mozilla? Mozilla Corporation is a non-profit-backed technology company that has helped shape the internet for the better over the past 25 years. We’re the makers of Firefox , the privacy-focused web browser used by…

DLP Helm IAM Kubernetes MDM +7 skills

Staff Site Reliability Engineer, Tools & Systems

NewBe an early applicant RemoteEuropeStaff

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

AI Automation CI/CD Cloud C++ +8 skills

Staff Product Manager – Firefox Enterprise

NewBe an early applicant RemoteEuropeStaff

Why Mozilla Mozilla Corporation is a non-profit-backed technology company that has helped shape the internet for the better over the past 25 years. We’re the makers of Firefox , the privacy-focused web browser used by…

AI EDR Gdpr Go-to-Market MDM +2 skills

Staff Operations Engineer

NewBe an early applicant RemoteEuropeStaff

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

AI Ansible Automation Cisco Cloud +16 skills

Senior Strategic Account Executive, Firefox Enterprise (DACH)

NewBe an early applicant RemoteEuropeContractSenior

Why Mozilla? Mozilla Corporation is a non-profit-backed technology company that has helped shape the internet for the better over the past 25 years. We’re the makers of Firefox , the privacy-focused web browser used by…

Account Executive Business Development Pre-sales SaaS Technical Discovery +1 skills

Senior Solutions Engineer (DACH), Firefox Enterprise

NewBe an early applicant RemoteEuropeSenior

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

AI DLP Helm IAM Kubernetes +8 skills

Senior Software Engineer, Privacy

NewBe an early applicant RemoteEuropeSenior

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

AI C++ JavaScript Machine Learning Python +2 skills

Staff Product Manager, Search Experiences

NewBe an early applicant RemoteNorth AmericaStaff

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

Agentic AI AI Analytics Business Development Data Science +4 skills

Staff Product Manager, Search Experiences

NewBe an early applicant RemoteNorth AmericaStaff

Why Mozilla? Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser.…

Agentic AI AI Analytics Business Development CAD +5 skills

Senior Security Engineer - SecOps

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To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the…

AI Automation Azure BigQuery Cloud +6 skills

Staff Technical Support Manager, Enterprise

NewBe an early applicant RemoteNorth AmericaStaff

To learn the Hiring Ranges for this position, please select your location from the Apply Now dropdown menu. To learn more about our Hiring Range System, please click this link. Why Mozilla? Mozilla Corporation is the…

AI Analytics Automation Corrective Action Gdpr +5 skills

Senior Contract Software Engineer (JavaScript) - Firefox

NewBe an early applicant RemoteUKContractSenior

The role You will help the Firefox DOM Core team improve the health of the Session History area. You will write tests to improve the coverage; you will fix tests and/or problems to improve the Gecko correctness.…