Principal Software Engineer at Riot Games

Setup: Hybrid
Location: California
Type: Full-time
Level: Principal
Posted: Apr 28, 2026

Description

Riot Games is seeking a Principal Software Engineer to join their League of Legends Quality Team. This role involves defining and driving the technical vision for core automation frameworks, ensuring high-quality standards across the League of Legends ecosystem. The engineer will collaborate with diverse teams, mentor junior developers, and contribute to setting technical discussions and designs. They will primarily use C++ for game and tooling logic, and Python for test automation.

Required Skills

C++
Java
Go
C#
Automated Tests

Additional Information

Required Previous Experiences: 8+ years of deep hands-on experiences with compiled programming languages (C/C++, Java, Go, or C#)
3+ years building and maintaining automated tests for games, web, mobile, backend services, or desktop applications (scope depending on role level).
Experience with C/C++ that spans various use-cases and platforms.
Have been responsible for driving value through leading the development of organization-sized efforts (1-year+ scope), including requirements gathering, planning, testing, and release or deployment
Championed software development best practices within your organization that includes design/code reviews, coding standards, source control management, testing, delivery performance, scalability, and maintainability
Preferred Qualifications: Leveraged machine learning, AI, and/or functional testing techniques to enhance automated testing workflows, enabling smarter test case prioritization, anomaly detection, and adaptive regression coverage across complex game systems.
2+ years experience utilizing computer vision in support of automation tests

About Riot Games

Riot Games

Riot Games. Developer of League of Legends, VALORANT, Teamfight Tactics, Legends of Runeterra, and Wild Rift. Creators of Arcane. Home of LOL and VALORANT Esports.