Principal Software Engineer (AI)

TL;DR

Principal Software Engineer (AI): Building and integrating modern AI practices into game engines, tools, and pipelines with an accent on generative AI, LLMs, and reinforcement learning. Focus on developing production-ready AI integrations, creating robust developer tools, and scaling AI adoption across diverse product teams.

Location: Must be based in the USA (implied by US-specific benefits and legal jurisdictions)

Company

Riot Games is a leading game developer dedicated to creating player-focused experiences and world-renowned IPs like VALORANT and League of Legends.

What you will do

• Lead the technical execution of integrating modern AI practices into existing game engines, tools, and pipelines.
• Embed within various partner teams to solve complex AI implementation problems and establish technical direction.
• Mentor and coach engineers through pair programming and technical reviews to ensure high engineering standards.
• Develop new foundations, middleware, and APIs to bridge the gap between AI research and practical development.
• Evangelize engineering best practices, security guardrails, and performance standards for AI usage across the ecosystem.
• Navigate high ambiguity to build consensus among engineering and product leadership.

Requirements

• BS in Computer Science or equivalent experience with 8-12 years of software engineering experience.
• Deep programming proficiency in C++ and at least one other language such as Python or C#.
• Experience shipping at least one AAA game or a large-scale, high-concurrency live service product.
• Proven track record of technical leadership and managing multi-month or multi-year initiatives.
• Practical experience utilizing, integrating, or building modern AI tools, APIs, or infrastructure.
• Work authorization for the United States is required.

Nice to have

• Experience extending or developing within Unreal Engine using C++.
• Familiarity with ML frameworks such as PyTorch, TensorFlow, or LLM orchestration.
• Background in shared engine technology, central tools, or platform engineering.
• Familiarity with Runeterra and VALORANT IPs.

Culture & Benefits

• Flexible work schedules and an open paid time off policy.
• Comprehensive medical, dental, and life insurance coverage.
• Parental leave for employees, spouses, domestic partners, and children.
• 401k retirement plan with company match.
• A collaborative environment focused on player empathy and professional craft expertise.