Senior Software Engineer - Traffic Proxy (Rust)

Location: San Mateo, California, United States. Hybrid office schedule: onsite Tuesday, Wednesday, and Thursday, with optional office presence Monday and Friday.

Base salary: $243,290–$295,250 USD annually, plus potential equity compensation and benefits.

Company

Roblox builds a platform and tools for creating and experiencing 3D digital experiences.

What you will do

• Design and build high-performance services in the request data path, prioritizing performance, reliability, and security.
• Migrate legacy proxy configurations to programmable, memory-safe Rust services running on Kubernetes.
• Improve traffic classification and automate detection and mitigation of DDoS and abuse traffic.
• Build feedback loops that automate mitigation and reduce mean time to recovery.
• Own production services through on-call participation, code reviews, incident reviews, and reliability improvements.
• Collaborate with Networking, Security, Reliability, and Compute teams on infrastructure priorities.

Requirements

• 7+ years of experience building and operating backend or infrastructure software, including ownership of a tier-0 production service.
• Strong systems programming experience; Rust is preferred, while strong Go experience with willingness to learn Rust is accepted.
• Deep knowledge of TCP, TLS, HTTP/1.1, HTTP/2, QUIC, and at least one production Layer 7 proxy such as HAProxy, Envoy, NGINX, or Pingora.
• Experience with kernel and userspace interaction, kernel tuning, and high-performance packet processing using technologies such as eBPF and XDP.
• Ability to design, build, and operate Kubernetes systems end to end, including reasoning about node-level latency and resource isolation.
• For office-based roles, regular onsite attendance in San Mateo is required; certain US visa categories may not be supported and future H-1B sponsorship may not be available.

Culture & Benefits

• Work on global edge infrastructure handling billions of web and API requests daily.
• Collaborate with principal engineers and cross-functional infrastructure and security partners.
• Use AI tools for research, development, and troubleshooting with critical evaluation.
• Participate in an on-call rotation and influence architectural and code-quality standards.
• Full-time employees are eligible for equity compensation and company benefits.