Senior Data Center Network Engineer – 400G/800G & GPU

Roblox Corporation; Ashburn, Northern (VA, KY); Hybrid; USD 152,000 - 191,000; Full time

Job summary

Roblox Corporation in Ashburn, Virginia, is seeking an experienced Data Center Network Engineer to lead design and operations of Roblox's large-scale data center fabrics, including GPU cluster networking for AI workloads. You will collaborate with cross-functional teams on new technologies, deploy 400G/800G hardware, and drive reliability and telemetry improvements while onsite three days a week.

This role requires 6+ years of data center networking experience, expertise in BGP, and strong

Qualifications

• 6+ years designing and deploying large-scale data center fabrics (CLOS).
• Experience with GPU clusters or AI/ML networking.
• Proficient with 400G and 800G hardware deployments.
• Hands-on with large-scale BGP deployments.
• Strong knowledge of TCP/IP, UDP, DHCP, DNS; IPv4/IPv6.

Responsibilities

• Drive design, deployment, and operations of Roblox's large-scale data center network.
• Coordinate data center builds and cross-team projects weekly.
• Validate new technologies and hardware for scalable solutions.
• Collaborate with multiple teams to address network challenges early.
• Contribute to automation and telemetry to improve reliability and visibility.

Skills

CLOS fabrics design

GPU/AI networking

400G/800G hardware

BGP troubleshooting

TCP/IP, UDP, DHCP, DNS

IPv4/IPv6 expertise

Tools

Open-source hardware

Open-source software

Job description

Roblox Corporation in Ashburn, Virginia, is seeking an experienced Data Center Network Engineer to lead design and operations of Roblox's large-scale data center fabrics, including GPU cluster networking for AI workloads. You will collaborate with cross-functional teams on new technologies, deploy 400G/800G hardware, and drive reliability and telemetry improvements while onsite three days a week.

This role requires 6+ years of data center networking experience, expertise in BGP, and strong