Roblox
Senior
Own end-to-end client performance (TTI, app size, battery) across Roblox's C++ engine on every platform
Interview for a Senior Software Engineer role on Roblox's Consumer App Foundation team, owning end-to-end performance of the Roblox client (TTI, app size, battery usage) across Android, iOS, macOS, Windows, and consoles. Expect deep C++ performance-engineering questions, benchmarking/telemetry system design, and cross-functional tradeoff conversations at a platform used by 150M+ daily users.
Step into this interview
Free · a live voice mock calibrated to this exact role
What this interview tests
- High-performance C++ in large, cross-platform, unfamiliar codebases
- Building benchmarking, profiling, and telemetry systems to catch regressions early
- Owning concrete performance metrics: TTI, app size, battery usage
- Cross-functional tradeoff conversations with Engineering, Product, Design
- Autonomously navigating ambiguous, complex systems to production-grade delivery
- On-device profiling (iOS/Android) as a plus
Common question themes
Walk through a specific C++ performance bug you diagnosed and fixed, with before/after metrics
How would you design a telemetry/benchmarking system to catch performance regressions pre-release
Describe taking a performance project from greenfield MVP to production at scale
How do you prioritize between competing performance metrics (e.g., startup time vs. battery vs. app size)
Tell me about diving into an unfamiliar large codebase and shipping a production-grade fix
How would you present a technical performance tradeoff to Product/Design stakeholders