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# Principal Software Engineering, App Performance (C++)

- **Company:** Roblox
- **Location:** San Mateo, CA, United States
- **Experience:** Expert
- **Salary:** $295,250.0 - $345,040.0
- **Contract:** Permanent contract
- **Skills:** Apple IOS, Application Performance Management, C++ (Programming Language), Continuous Integration, Software Engineering, Build Tools, Roblox
- **Published:** July 17, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=59b273d354e276e3

## About the Role

* 10+ years of experience: working in C++ with a track record of writing high-quality, performant code in large and complex codebases.
 * Comfort with ambiguity: able to dive into unfamiliar codebases, unblock yourself, and take projects from greenfield/MVP production-grade.
 * Mobile performance expertise: hands-on experience improving performance on mobile platforms (iOS and/or Android), including on-device profiling to find and measure opportunities.
 * Systems thinking: ability to build systems that work and keep on working reliably (measurement, monitoring, regression prevention).

## Description

* Conduct research, create and drive execution of roadmaps aimed to improve efficiency of Roblox on target platforms
 * Design novel solutions to optimize performance and computing resources usage of Roblox client app.
 * Profile and diagnose real-world performance on iOS or Android to identify bottlenecks, validate wins, and prevent regressions using platform tooling.
 * Build and productionize repeatable benchmarks/experiments, CI/CD automation to catch regressions early, dashboards/alerts with actionable signals.
 * Work with stakeholders across Engineering, Product, and Design to align on priorities, tradeoffs, and rollout plans; ensure performance improvements support the user experience.
 * Deliver improvements and guardrails that scale across mobile, desktop, and console, with informed tradeoffs for mobile constraints.


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