Location: Remote - eligible US locations

About the role and about you:

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 custom game platform, and play an important role in building and optimizing our game systems, application architecture, and player-facing experiences.

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, testable code, improving application performance, creating instrumentation and metrics, and ensuring compatibility across a wide range of platforms and devices. You will have the opportunity to shape the technical foundation of our game and help us innovate in the fitness gaming space.

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!

What you'll do:

• Design and implement game 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, and UX designers to design, plan, test, and deliver high-quality features.
• Optimize game performance through profiling, instrumentation, and improvements in CPU utilization, memory usage, 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, Continuous Integration / Continuous Deployment (CI/CD), reusability, and maintainability.

What we're looking for:

• Bachelor's degree in Computer Science, Software Engineering, or similar discipline.
• 5+ years of relevant engineering experience.
• Strong expertise in C++ development, including experience with native libraries and performance optimization.
• Familiarity with multi-threading, memory management, 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 CI/CD and automated testing frameworks.
• Strong problem-solving skills and able to work and collaborate effectively in remote, distributed teams.

Bonus points:

• Experience working on game engines (Unity, Unreal, or custom-built) and their integration with native platforms.
• Familiarity with multiplayer game systems and latency-sensitive applications.
• Experience in experimentation and feature flag systems (e.g. Amplitude, Optimizely, Firebase, or similar).
• Experience with Java and modern Android development practices.
• 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.

If Zwift determines in any stage of our interviews that any AI tools are being used without disclosure or citation, your candidacy will be disqualified.

For All US Based Full-Time Positions:

The base salary for this position ranges between $128,000.00 to $204,000.00. The base salary will be based on a number of factors including the role offered, the individual's job-related knowledge, skills, qualifications, and geographic location. In addition to base salary, Zwift is proud to offer a comprehensive and competitive benefits package for all eligible employees which also includes performance bonuses, equity, and a full range of medical, financial, and other perks and benefits.