ApplySarthiContract Staff Software Engineer - Performance Graphics (C++,Rust, WebGL)
Mozilla
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Skills named in this job
Read from the description itself, not inferred.
This role on the market
612 open performance roles across 171 companies are on ApplySarthi right now, most of them in Bengaluru (46), Hyderabad (22), Pune (8).
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What performance roles keep asking for: C++ (15%), Python (14%) — counted across their open postings here.
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Mozilla has 77 open roles listed here.
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Counted across 14 company job boards, updated as roles open and close.
Preparing for this interview
Interviews for performance roles keep coming back to C++, Python. Practise those questions before you sit with Mozilla.
Questions you are likely to be asked
- Why do you want to join Mozilla?
- What is your experience with Android? Tell me one thing you learned the hard way.
- What do you do when a production issue happens on your code?
- Walk me through a system you built. How was it designed, and what would you change now?
- Tell me about a hard bug you tracked down. How did you find the cause?
Prep Sarthi gives you a free mock interview: an AI interviewer asks you questions like these out loud, from your own CV and this job, and shows your score and your weakest answer.
Practise the Contract Staff Software Engineer - Performance Graphics (C++,Rust, WebGL) at Mozilla interview free →The role
You will take on the ongoing maintenance and engineering work in Firefox’s Graphics area (rendering, compositing, images, canvas, WebGL). You help keep the graphics code healthy.
Responsibilities
- Own day-to-day Graphics maintenance: bug fixes, regressions, test upkeep, incoming issues.
- Diagnose and fix graphics problems across platforms (Windows, macOS, Linux, Android).
- Carry code review and routine upkeep so the FTE engineers can focus on performance.
Definition of done
A healthy Graphics area, backlog and regressions kept down, with the team’s senior engineers freed to focus on performance.
Required qualifications
- Strong C++ and/or Rust.
- Knowledge of graphics frameworks and GPU architecture.
- Strong debugging and optimization in a multithreaded codebase.
- Able to work independently and lead technically in a large, mature codebase.
Preferred
- Shader languages; mobile/Android; open-source collaboration.
Hiring Ranges:
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Listed on greenhouse · posted 2026-09-22. ApplySarthi collects openings and links to application pages; the role is advertised by Mozilla, not by us.