Senior Software Engineer (Backend), Co-Experience

Overview

Senior Software Engineer (Backend) on the Co-Experience team, building and maintaining the backend services behind Roblox's platform-level Party System and a safe, age-appropriate social ecosystem.

What you'll do

• Collaborate within a cross-functional team that includes product, design, UXR, frontend and backend engineering.
• Take end-to-end ownership of projects, from technical plans and architecture through launch, iteration, and measurable impact.
• Maintain, improve and scale the Roblox party system to support millions of concurrent users, with a safety-first mindset.
• Partner with other engineering teams (matchmaking, recommendations, voice, economy) to integrate multiple systems in a reusable, performant and safe manner, working through alignment challenges autonomously.
• Uphold high quality standards while iterating on features with live production traffic, and resolve escalations within your team.
• Raise the team's technical bar and accelerate the productivity of junior engineers.

What you'll need

• 5+ years of experience working on microservice architectures, with a proven track record in addressing scalability and reliability challenges (4+ years with a graduate degree in computer science or a related field).
• 3+ years of experience building systems behind consumer-facing APIs that handle large numbers of concurrent users.
• Strong understanding of server-side development and design principles, with proficiency in at least one compiled language such as C#, C++, Java, Golang, or other.
• A track record of leveraging AI-assisted development tools to maximize engineering velocity, allowing you to navigate large codebases, iterate on complex logic, and move from idea to production-ready code with high efficiency.
• The ability to author a clear, actionable technical design document that aligns stakeholders and holds up in architectural review.

Details

• Location: San Mateo, CA, United States (headquarters).
• Roles based in the office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).
• Annual base salary range: $196,750 to $243,290 USD. Full-time employees are also eligible for equity compensation and benefits.
• For US based roles only: the Company may not be able to employ candidates who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.