Principal Software Engineer

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. Are you a seasoned engineer with a passion for reliability and scalability? We’re looking for exceptional Software Engineers with hands-on AI/ML experience to join the Reliability team at Roblox. In this pivotal role, you will drive the evolution of our systems, ensuring they meet the highest standards of performance, reliability, and efficiency. You’ll collaborate with cross-functional teams to build robust infrastructure that supports our growth. If you have a track record of solving complex technical challenges, we want to meet you. We are the team that built the C3 and TACO systems mentioned in The Infrastructure Supporting Record-Breaking Experiences. Join us in shaping the future of our platform and delivering unparalleled value to our users. At Roblox, our vision is to achieve 1 billion daily active users. We believe this engineer will be instrumental in driving us towards that ambitious goal. You Will: Lead a team of engineers (4+) to drive multi quarter projects to scale Roblox and make systems more efficient. Build systems that leverage AI and ML to scale services and workloads across multiple geographical regions. Build, automate and standardize process automation to create a “golden path” of tooling and platform support that powers the fundamental Roblox ecosystem. Create performance monitoring services and observability towards understanding capacity issues and platform degradations. Work with product teams across organizations to understand their most critical problems and solve them with software systems. You Have: Experience: you have a BS degree (or equivalent professional experience) in Computer Science or related engineering field with at least 8 years of experience including at least 5+ years in Software Engineering or SRE. Passion for systems: You have a track record of building distributed systems and getting them adopted. You care about reliability, efficiency, and user experience. Technical Leadership: Ability to lead, coach, and mentor junior engineers Experience optimizing end-to-end performance of distributed systems, including workload right-sizing and resource utilization tuning. Deep curiosity for how things work under the hood and have a proven ability to work independently to solve opaque performance issues Deep expertise in distributed systems at scale, with a strong focus on infrastructure reliability, scalability, and continuous improvement. You Are: A Partner: You know that the best tools integrate broadly with the tooling ecosystem. You approach partners and processes with curiosity and seek to understand a problem deeply before you start coding. A Builder: You design and build systems and products. You are hands on and proficient in at least one programming language (e.g., Python, Go, C#, Rust, Java) and embrace AI coding agents. Self-organized: you’re excited about getting in front of complex problems, organizing your work by any means possible; overcome emergent issues and contributing to long-running projects as a part of the team. Problem Solver: you ask the right questions to solve issues within your expertise and you use data to test your theories. Planner - You have experience in large project ... (truncated, view full listing at source)