Senior Network Engineer - Data Center Networking

Ashburn · San Mateo · USD 151,820-191,250 / year · 6+ years experience · Full-time · Onsite · Posted Oct 9, 2026

At a glance

The Data Center Network Engineering (DNE) team owns the design, deployment, and operation of Roblox's large-scale data center network.
This role involves building High-Performance Networking (HPN) fabrics, deploying 400G/800G networking, and scaling GPU clusters to support AI training and inference.

Drive the design, deployment, and operations of Roblox's large-scale data center network, including the networking for GPU clusters that support training and inference workloads.
Design, qualify, and validate new technologies and hardware for scalable solutions.
Coordinate data center builds and projects with multiple teams, including weekly cross-team calls.
Work with Network Reliability Systems, Data Center Ops, Capacity Planning, Supply Chain, and Compute/ML teams to address network challenges early.
Contribute to automation and telemetry that improve efficiency, reliability, and visibility.

6+ years of expertise designing and deploying large-scale data center fabrics (CLOS).
Experience with GPU clusters or AI/ML networking.
Proficiency deploying and managing 400G and 800G hardware.
Skilled in configuring and troubleshooting large-scale BGP deployments.
Strong knowledge of network protocols (TCP/IP, UDP, DHCP, DNS), with hands-on experience in IPv4 and IPv6.

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).