Senior Backend Engineer: Scalable Social Platform & AI

Roblox; San Mateo (CA); On-site; USD 180,000 - 230,000; Full time

Job summary

Roblox is seeking a Senior Software Engineer (Backend) to own the backend services behind Roblox’s social ecosystem. You’ll design and scale the party system that enables millions of players to connect, coordinate, and interact safely across servers and experiences.

You will collaborate with product, design, UXR, frontend and backend teams, driving architectural decisions, and delivering high-impact features.

Qualifications

• 5+ years of experience on microservice architectures.
• Proven ability to address scalability and reliability challenges.
• 3+ years of experience building systems behind consumer-facing APIs with high concurrency.
• Familiarity with AI-assisted development to boost velocity.

Responsibilities

• Own end-to-end design, architecture, and delivery of backend services.
• Collaborate with product, design, and other engineering teams to deploy features.
• Scale the Roblox party system to support millions of concurrent users safely.
• Partner with other teams (matchmaking, voice, economy) to integrate systems.
• Maintain high quality standards and mentor junior engineers.

Skills

Microservices

Scalability

Reliability

Backend development

C#

C++

Java

Golang

AI-assisted development

Education

Graduate degree in computer science or related field

Tools

AI-assisted development tools

Job description

Roblox is seeking a Senior Software Engineer (Backend) to own the backend services behind Roblox’s social ecosystem. You’ll design and scale the party system that enables millions of players to connect, coordinate, and interact safely across servers and experiences.

You will collaborate with product, design, UXR, frontend and backend teams, driving architectural decisions, and delivering high-impact features.