Principal Engineer, App Performance & Reliability

Roblox Corporation; San Mateo (CA); Hybrid; USD 295,000 - 345,000; Full time

Job summary

Roblox Corporation in California is seeking a Principal Software Engineer for App Performance to lead stability and cross‑platform optimization of the Roblox consumer app. You will drive research and roadmaps to prevent crashes, reduce hangs, and improve responsiveness across mobile, desktop, and console devices, partnering with teams across Engineering, Product, and Design.

This role requires senior-level expertise with C++ and performance profiling, a systems mindset, and a track record of

Qualifications

• 10+ years of experience with complex client applications.
• Ability to dive into unfamiliar codebases and drive projects to production.
• Hands-on performance profiling on mobile or desktop platforms.
• Builds reliable systems with measurement and monitoring.

Responsibilities

• Drive research of new opportunities and roadmaps to improve stability.
• Design solutions to prevent crashes, hangs, and interruptions.
• Build defense mechanisms for real-time monitoring, alerting, and CI/CD automation.
• Collaborate with Engineering, Product and Design on priorities and rollout plans.
• Deliver guardrails for performance across mobile, desktop, and console.

Skills

C++

Lua

Performance profiling

Triaging issues

Systems thinking

Job description

Roblox Corporation in California is seeking a Principal Software Engineer for App Performance to lead stability and cross‑platform optimization of the Roblox consumer app. You will drive research and roadmaps to prevent crashes, reduce hangs, and improve responsiveness across mobile, desktop, and console devices, partnering with teams across Engineering, Product, and Design.

This role requires senior-level expertise with C++ and performance profiling, a systems mindset, and a track record of