Software Engineer, User Co-Experience
Core
Building and scaling the backend infrastructure for Roblox's platform-level Party System to enable safe, civil, and meaningful social interactions for millions of concurrent users.
Role type
Senior Backend Engineer (Social Infrastructure)
Builds
Scalable microservices and APIs for the Party System (grouping, coordination, cross-server connectivity)
Domain
Social networking / Real-time multiplayer platforms
Deliverable
production ML models | product features | infrastructure
Required skills
Microservice architecture design, Server-side development (C#, C++, Java, Golang), API design for high concurrency, System design, Product intuition, AI-assisted development tools
Preferred skills
Experience with chat/voice systems, Matchmaking logic, Trust and safety integration
Technologies
C#, C++, Java, Golang, Microservices, APIs
Responsibilities
Maintain and scale the Party System for millions of concurrent users, Develop service infrastructure for creators, Partner with infrastructure and safety teams, Self-organize and own project lifecycles, Mentor interns
Seniority
Mid-level, hands-on IC
