Staff Software Engineer-Bug Burndown

Mozilla·Remote Canada; Remote Germany; Remote UKRemote

In short

→Trabajas en reducir el backlog de errores de compatibilidad web en Firefox.
→Diagnosticas y solucionas bugs de sitios rotos usando herramientas de desarrollo y AI.
→Destaca por tener un impacto directo en la estabilidad del navegador para millones de usuarios.

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✓ Free to start✓ Runs in your browser✓ First dossier, no card✓ Ready in ~1 minute

In ~1 minute you get: who interviews you, the likely questions answered from your CV, and your CV tailored to this job. Your first dossier is free.

The questions they'll ask you

1. ¿Cómo usaste herramientas de IA para resolver un bug de compatibilidad web real?

🔒 +7 more questions

No card. Upload your resume and the full dossier is ready in ~1 minute.

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💵 USD · Remote · No visa

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What they ask for

✓Dominio de HTML, CSS y JavaScript.
✓Capacidad para debuggear problemas reales en navegadores.
✓Uso familiar de herramientas de desarrollo del navegador.
✓Comfort con herramientas de IA para diagnóstico y corrección.
✓Experiencia previa en compatibilidad web o estándares web.
✓Habilidades de triage y reproducción de reportes de errores.

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

FirefoxGeckoHTMLCSSJavaScriptBrowser DevToolsAI toolingWebCompatBug triageInterventions

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.

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.

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