Senior Software Engineer (Backend Full Stack), Communications Platform

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 were 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. Were 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 youll 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.

As a Senior Software Engineer on the Communications Platform team youll build and own the systems that power how millions of Roblox users connect express themselves and communicate across the app in-experience and on every device. Our platform underlies chat direct messaging forums comments and more and it has to be fast reliable and safe at global scale. The technologies we operate include real-time socket messaging streaming pipelines search infrastructure rich messaging systems and the APIs that tie it all together.

Youll be building the primitives that internal teams and our creator community rely on to ship communication features quickly with safety as a first-class technical constraint that shapes the design of every system we build.

You Will:

• Design build and operate the high-throughput low-latency infrastructure that powers communication for tens of millions of daily users such as real-time messaging streaming search and more.
• Lead end-to-end delivery of complex technical initiatives: from defining requirements and authoring design docs to shipping and operating in production.
• Build APIs and client libraries for both internal engineering teams and Robloxs creator community making it simple to build rich powerful communication features on our platform.
• Define technical direction for your areas of ownership: set API contracts establish core primitives identify risks early integrate user safety principles and raise the bar for engineering best practices.
• Partner with Product Design QA and across engineering groups to scope and deliver high-quality products.
• Own production reliability: participate in on-call drive performance improvements and set a high bar for operational health.
• Mentor and level up engineers around you through code review design feedback and knowledge sharing.

You Are:

• Experienced: 5 years of backend or full-stack software engineering with demonstrated ownership of large-scale production systems.
• A distributed systems thinker: Strong fundamentals in designing and operating services under real load and at global scale.
• Technically versatile: Proficient in at least one server-side language (C# Java Go C) and comfortable navigating large complex codebases. Experienced with or curious about client or app development.
• A clear communicator: You write sharp technical specs reason carefully about trade-offs and make decisions that hold up over time.
• An end-to-end owner: You drive projects from requirements through production including cross-functional coordination. You dont hand off and walk away.
• Product-opinionated: You proactively shape the roadmap and push for the right outcomes. You dont just execute plans.
• Kind and generous: You treat colleagues with respect assume good intent and go out of your way to help others succeed.
• 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 high standard.