Principal Software Engineer, App Performance & Stability

Showcify, Inc.; San Mateo (CA); Hybrid; USD 295,000 - 345,000; Full time

Job summary

Roblox is seeking a Principal Software Engineer to lead stability and performance initiatives across our C++ game engine and front-end codebase. You will collaborate with teams across the company to identify bottlenecks, deploy measurable improvements, and prevent regressions while supporting a wide range of devices and platforms.

The role requires 10+ years of experience with complex client applications, strong C++ skills, and a deep understanding of performance profiling, platform APIs, and

Qualifications

• 10+ years of experience with complex client application codebases.
• Strong proficiency in C++ with hands-on knowledge of scripting languages such as Lua.
• Hands-on experience in performance profiling and triaging issues on mobile or desktop platforms.
• Deep understanding of platform APIs and best practices for robust code.
• Ability to build systems that are reliable and measurable through monitoring and regression prevention.

Responsibilities

• Drive stability and performance improvements across game engine and front-end codebase.
• Design solutions to prevent crashes, hangs, and interruptions that impact user experience.
• Develop real-time monitoring, alerting, and CI/CD automation for early anomaly detection.
• Collaborate with Engineering, Product, and Design to align priorities and rollout plans.
• Deliver scalable improvements for mobile, desktop, and console platforms.

Skills

10+ years experience

C++ proficiency

Lua scripting

Performance profiling

Cross‑platform expertise

Systems thinking

Job description

Roblox is seeking a Principal Software Engineer to lead stability and performance initiatives across our C++ game engine and front-end codebase. You will collaborate with teams across the company to identify bottlenecks, deploy measurable improvements, and prevent regressions while supporting a wide range of devices and platforms.

The role requires 10+ years of experience with complex client applications, strong C++ skills, and a deep understanding of performance profiling, platform APIs, and