Principal Software Engineer (Test Automation, League of Legends)

• As a Principal Software Engineer on the League of Legends Quality Team, you will define and drive the technical vision for our core automation frameworks, ensuring the highest standards of quality across the League of Legends ecosystem. Your work will empower engineers across multiple initiatives—ranging from gameplay mechanics to skin development—by providing reliable, scalable frameworks that support efficient and robust testing practices
• In this role, you’ll report directly to the Engineering Manager and play a key leadership role in cross-team collaboration. You’ll work closely with engineers and QA across Riot to align on quality frameworks and workflows, elevate the developer experience, and improve the overall quality of our products
• We primarily use C++ for game and tooling logic, and Python to drive our test automation and validation systems
• Collaboration with diverse teams to ensure features accomplish expectations from multiple dimensions (code quality, extensibility, modularity, scalability, security, operational concerns, and industry standards/trends)
• Work and align with different partners that span across multiple teams to ensure we’re delivering awesome features to excite them
• Setting the tone for, contributing to, and defining technical discussions/designs that your team is accountable for
• Mentorship. You help Rioters develop the tools and creative atmosphere to shine, but ultimately hold them accountable for making smart calls and delivering player value
• Participate in the team’s support rotation

Benefits

• Healthcare: Medical, dental, and vision plans that cover you as well as your spouse/domestic partner and children.
• Family Care: Life insurance, parental leave, plus short and long-term disability.
• Open Paid Time Off: In addition to holidays, a 2-week end of year break, and a 1-week mid-year break, Rioters are trusted to take the time they need throughout the year.
• Retirement: Riot matches retirement contributions so you can continue to play games long after you retire.
• Play Fund: Riot’s annual play fund allows Rioters to broaden their knowledge of the games that matter to players and the community.
• Donation Matching: Riot matches donations of time and money to nonprofits to double down on support.

• You have a strong history of mentoring others in both soft and hard skills
• Experience with C/C++ that spans various use-cases and platforms
• 3+ years building and maintaining automated tests for games, web, mobile, backend services, or desktop applications (scope depending on role level)
• Championed software development best practices within your organization that includes design/code reviews, coding standards, source control management, testing, delivery performance, scalability, and maintainability
• 8+ years of deep hands-on experiences with compiled programming languages (C/C++, Java, Go, or C#)
• 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
• 2+ years experience utilizing computer vision in support of automation tests
• 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