Contract Software Engineer - DOM Core Firefox/Gecko

mozillamid

In short

→Desarrollar y depurar pruebas para mejorar la estabilidad de la historia de sesión en Firefox
→Trabajar con pruebas Web Platform y mochitests en C++/JavaScript dentro de Gecko
→Rol de contrato con impacto directo en la corrección y cubrimiento de código, en entorno abierto

Comfort working in the open: public bugs, code review, and upstream landing.

Apply on company site ↗Share on WhatsApp

In ~1 minute you get: who interviews you, the likely questions answered from your CV, and your CV tailored to this job. Free, no card.

🎧Land the interview? Bring the copilot. Our free extension listens to the live interview and flashes 3-4-word anchors from your resume and prep — glance, connect, talk. Get the extension →

What they ask for

✓Experiencia sólida en un código base de navegador, idealmente Firefox/Gecko
✓Excelente dominio de JavaScript para escribir pruebas automatizadas
✓Habilidades probadas en desarrollo con C++
✓Capacidad comprobada para depurar en código maduro y amplio
✓Comodidad en entornos abiertos: bugs públicos, revisiones de código y envío de cambios
✓Deseable: contribuciones previas a Gecko o a otro motor de navegador

Don't tick every box? That's normal — your free dossier shows your gaps and how to cover them in the interview.

JavaScriptC++Web Platform TestsmochitestsGeckobug trackingcode reviewupstream landingtest coveragesession history

Who should you write to at mozilla?

Your free dossier identifies the people who'd interview you — their background, what they value, and how to reach out so you stand out before applying.

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. Responsibilities • Write Web-Platform tests to improve the coverage, and Gecko mochitests as needed • Fix the problems and pass the tests to improve the Gecko correctness • Work through code review with the relevant Gecko module owners and iterate to landing Definition of done Improved Session History test coverage and code correctness in Gecko, measured by passed test cases, allowing the team’s senior engineers to focus on security, performance and strategic projects. Required qualifications • Substantial experience in a browser-engine codebase or in automating for a browser-engine, ideally Firefox/Gecko. • Solid Javascript and applying that language skill to write automated tests. • Proficiency in and experience developing software in C++. • Strong debugging skills in a mature larget 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 web standards and Web Platform Tests. Find Jobs in France on Arbeitnow

Looking for something similar?

Leave your email and we'll alert you when matching jobs appear.

Don't apply unprepared

We research who's interviewing you, tailor your CV and rehearse you live — first one free.