As a Senior Backend Engineer on the User Communities team, you’ll own the backend systems that power social engagement features (Announcements, Forums, Polls, Roles & Permissions systems) for millions of players and creators on Roblox.

Your day-to-day will focus on building and scaling the infrastructure that makes both in-experience and on-platform communication and player engagement fast, safe, and reliable. That means driving architectural decisions, reasoning through trade-offs, influencing stakeholders, championing user-first safety standards, and defining developer-facing APIs so creators can build richer experiences. You'll work closely with frontend and backend engineers, product, design, and data scientists across teams, and you'll have real influence over our technical and product direction.

If you're an experienced engineer who gets excited about large-scale distributed systems and wants to shape the way millions of people connect inside virtual worlds, we'd love to talk.

You Will:

• Shape the backend engineering culture across the Communities team. Your influence extends beyond your immediate pod to improve how we build, review, and ship software across the entire org.
• Act as the technical lead for cross-functional initiatives. Collaborate across multiple pods alongside product, design and both frontend and backend engineers.
• Take end-to-end ownership of projects. Drive initiatives from the creation of comprehensive technical plans and architecture through to successful launch, iteration, and measurable impact.
• Be hands-on in the codebase. Our senior engineers actively develop the platform and review the code.
• Design empowering systems. Build architectures that enable Roblox creators and players to actively engage with each other both in-experience as well as on the platform.
• Promote exploration and experimentation among engineers, advocating for new technologies and flows that promote user experience, with a safety-first mindset.

You Have:

• 8+ years of backend software engineering experience, with demonstrated ownership of large-scale production systems.
• Strong distributed systems fundamentals — experience architecting and operating large, complex systems that handle high throughput
• Deep proficiency in at least one server-side language (e.g., C#, Java, C++) and comfort navigating large, complex codebases. 
• Ability to author clear technical specs, reason about trade-offs that hold up at scale, and influence teams towards the correct collective architecture.
• Track record of broad system architecture — from ambiguous requirements through production, including cross-functional coordination with product, and alignment with multiple engineering teams.
• Strong engineering fundamentals — code quality, test coverage, observability (logging, metrics, alerting), and incident response.

You Are:

• Kind and generous: You treat colleagues with respect, assume good intent, and go out of your way to help others succeed. You believe technical excellence without kindness is not enough.
• Product-opinionated: You don't just execute plans, you proactively shape our roadmap, and push for the right product outcomes.
• Hands-on: You write code, review code, and stay close to the product. You're not looking for a role where you stop building.
• An AI advocate: You actively push the boundaries of AI-assisted development for yourself and your team.
• Continuously growing: You take pride in your craft and hold yourself to a higher standard each quarter.