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# Senior Software Engineer, Runtime

- **Company:** Roblox
- **Location:** Canada, KY, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), C++ (Programming Language), Game Engine, Real Time Systems, Concurrency, C++14
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_a1fec86d0f4dc5c3540a445a882ce670

## About the Role

* Strong modern C++ (C++17 or newer) in a large, complex production codebase
 * Deep multithreading/concurrency experience - schedulers, thread pools, lock-free programming, atomics, memory models
 * Comfort profiling and reasoning about performance at the OS/CPU level, * Game engine or real-time systems experience
 * Fiber/coroutine runtimes, work-stealing or job-system schedulers
 * Cross-platform low-level development (Android, iOS, console)
 * Track record as the go-to expert other teams consult on a system

## Description

* Take ownership of part of the engine's Concurrency system - the task scheduler, fiber runtime, and async APIs that every other engine team builds on.
 * Research and implement performance improvements that unblock platform initiatives - unlocking higher fidelity and richer experiences.
 * Serve as a point of contact for concurrency across the org: design reviews, hard parallelism bugs, and asks from other engine teams.
 * Improve the ergonomics, testability, and debuggability of concurrent code across PC, Mac, mobile, and console.