Contract Staff Software Engineer-FireFox Layout

Mozilla·Remote CanadaRemotesenior

In short

→Mantenimiento diario de la funcionalidad de diseño de páginas en Firefox (CSS, texto, imágenes, APZ).
→Trabajas de forma independiente resolviendo errores, revisando código y manteniendo pruebas estables en múltiples plataformas.
→Destacado: Trabajas como líder técnico sin supervisión directa en un código maduro y complejo.

Proficiency in English is required for participation in meetings and code reviews.

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What they ask for

✓Dominio sólido de C++.
✓Conocimiento sólido de CSS y diseño de páginas.
✓Habilidades avanzadas en depuración y optimización en código multihilo.
✓Capacidad para trabajar de forma independiente y liderar técnicamente.
✓Experiencia en arquitectura de navegadores web (deseable).
✓Experiencia en estándares web (deseable).

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

C++JavaScriptRustCSSAPZmulti-threaded codebaseWeb standardsmobile web developmentprofilingdebugging

Who should you write to at Mozilla?

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You will take on the ongoing maintenance and routine engineering work in Firefox’s Layout area (CSS, page layout, APZ, text, images). Working independently at a tech-lead level, you keep the Layout code healthy. Responsibilities • Own day-to-day Layout maintenance: fix bugs and regressions, keep tests green, handle incoming issues. • Diagnose and fix Layout problems across platforms (Windows, macOS, Linux, Android). • Carry code review and routine upkeep so the FTE engineers can focus on other mission critical projects. . • Join planning and standards / web-compat meetings as needed. Definition of done A healthy Layout area, backlog and regressions kept down, with the team’s senior engineers freed to focus on critical Performance and Security issues. Required qualifications • Strong C++ (JavaScript and/or Rust a plus). • Solid CSS and page-layout knowledge. • Strong debugging and optimization in a multithreaded codebase. • Able to work independently and lead technically in a large, mature codebase. Preferred • Prior experience in web browser architecture and development. • Prior Web standards experience. • Mobile web development, profiling and debugging skills a plus . • Proven experience in utilization of AI tools (Claude, ChatGPT, etc.) in the investigation, development, debugging, and/or testing of code is a plus. Hiring Ranges: Canada Tier 1 Locations $185,045 — $217,700 CAD Canada Tier 2 Locations $131,400 — $154,600 CAD

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