Senior Software Engineer (Backend), Communication

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 team youll own the backend systems that power chat and messaging for millions of players on Roblox and support billions of messages per day.

Your day-to-day will focus on building and scaling the infrastructure that makes in-game communication fast safe and reliable. That means driving architectural decisions creating communication modes that dont exist yet and defining developer-facing APIs so creators can build richer experiences. Youll work closely with frontend engineers platform product and design and youll have real influence over the technical and product direction of the team.

If youre an experienced engineer who gets excited about large-scale distributed systems and wants to shape the way millions of people connect inside virtual worlds wed love to talk.

You Will

• Build and scale backend infrastructure for millions of concurrent users architecting high-throughput distributed services integrating ML models and enabling rapid product experimentation
• Equip creators with the APIs and tools to build deeply integrated social experiences in their games
• Own projects end-to-end: from design and architecture through production and long-term reliability
• Raise the bar on engineering standards through rigorous design testing and diligent code review
• Collaborate cross-functionally with teams across Roblox including Game Engine Creator and Safety
• Mentor engineers on the team and contribute to recruiting future talent

You Are

• Experienced: 7 years building and operating large-scale distributed systems in production
• Systems-fluent: comfortable with relational databases at scale (SQL Server MySQL PostgreSQL) and low-level concepts like threading memory management networking and storage
• Protocol-savvy: well-versed in HTTP UDP gRPC and WebSockets
• Analytical: you like digging into ambiguous problems and quantifying both the issue and the solution
• Rigorous: you design for failure write thorough tests and build systems that stay up
• Collaborative: you write clear design specs align cross-functional partners and guide projects from start to finish
• Kind and generous: You treat colleagues with respect assume good intent and go out of your way to help others succeed
• Bonus: experience with communication products C ML model integration or big data tools (Spark Airflow Hive)