Principal Software Engineer - League of Legends , UI Tooling

Los Angeles · 8+ years experience · Posted Sep 22, 2026

At a glance

As a Principal Software Engineer on the UI Tooling team, you will develop against the foundations of the UI frameworks and authoring tools used to build experiences for League of Legends.
The scope of this position requires collaboration with technology owners and content teams across the organization to ensure we provide thoughtful tools and workflows that help engineers, designers, and artists create and iterate effectively.
Our platform is written in C++ and makes heavy use of the Qt ecosystem for UI/UX, with Python supporting several utility and workflow needs.

Work and align with different partners that span across multiple teams to ensure we're delivering awesome features to excite them
Contributing to technical discussions/designs that your team oversees
Own the software lifecycle for your code that includes develop/test/deploy/maintaining frameworks, platforms, and tools
Mentorship. You help junior Rioters develop the tools and creative atmosphere to shine
Participate in the team's support rotation

8+ years of deep hands-on experience with C/C++ that spans several use-cases and platforms.
At least 5 years of experience in the video game industry that includes working within multiple game development UI and an example of a shipped game.
Have been responsible for driving the development of several organizational sized development efforts (1-year+ scope), including requirements gathering, planning, and testing.
Maintained software development best practices within your organization that includes design/code reviews, coding standards, source control management, testing, delivery performance, scalability, and maintainability
Experience working on a custom, internally developed game engine and tooling.
Expertise with UX artist workflows