Senior Software Engineer , Game Systems

Location: Remote
- Eligible US Locations

As Senior Software Engineer, Game Systems, you'll work with a team of talented engineers to ensure that Zwift customers have a smooth, stable game experience across all of our supported platforms, including iOS, Windows, Android, Mac, and Apple TV. You will work at the heart of our game engine, owning core game systems, graphics/rendering,application architecture, and helping define the technical future of our fitness game.

This role is ideal for engineers with strong C++ skills who can effectively deliver results, deal with ambiguity, and collaborate closely with teammates and stakeholders. You will focus on writing high-quality, maintainable code, improving application performance (including performance related to graphics and rendering), creating instrumentation and metrics, and ensuring compatibility across a wide range of platforms and devices.

If you're excited about solving complex technical challenges, driving engineering and operational excellence, and working on a product that inspires millions of users worldwide, we'd love to hear from you!

• Design and implement game engine features and systems in C++ for all Zwift platforms (iOS, Windows, Android, Mac, Apple TV), ensuring optimal performance and maintainability.
• Collaborate with cross-functional teams, including game engineers, backend engineers, product managers, game artists, and UX designers to design, plan, test, and deliver high‑quality features.
• Drive in‑depth performance analysis, profiling, and optimization across all platforms to deliver improvements in CPU utilization, memory usage and budgeting, and startup times.
• Build tools and frameworks to improve development workflows and empower other other engineers.
• Debug and resolve complex issues across a diverse set of devices and platforms, improving reliability and stability.
• Contribute to code reviews, design discussions, and team planning processes.
• Ensure code quality through automated testing (e.g., unit testing, integration testing, and similar).
• Advocate for and implement engineering best practices like automated testing, CI/CD pipelines, and code modularity.

• Bachelor's degree in Computer Science, Software Engineering, or similar discipline.
• 7+ years of relevant engineering experience, with 2+ years of experience in game graphics and/or game engine development.
• Strong expertise in C++ development, including best practices for high-performance applications, debugging, and performance analysis.
• Experience designing, implementing, optimizing, and troubleshooting changes related to game graphics and rendering.
• Experience with shading languages such as GLSL, GLSL ES / ESSL, and MSL.
• Experience with multi-threading, memory management and budgeting, and software design patterns.
• Proven experience delivering production-quality features with appropriate levels of testing and instrumentation.
• Familiar with Git and version control workflows.
• Experience with Continuous Integration / Continuous Deployment (CI/CD) and automated testing frameworks.
• Strong problem‑solving skills and able to work and collaborate effectively in remote, distributed teams.

• Experience with game engines (custom/proprietary preferred, Unity, Unreal) and their integration with native platforms.
• Strong 3D math and algebra skills.
• Familiarity with real‑time networking and multiplayer game systems.
• Experience in experimentation and feature flag systems (e.g. Amplitude, Optimizely, Firebase, or similar).
• Solid understanding of Android app architecture, the JNI, and native‑to‑Java bridging.
• Interest in building solutions that support our engaged Zwift Community of cyclists, runners, and fitness enthusiasts.