Senior DCN Engineer: 400G/800G & AI Clusters

Showcify, Inc.; Ashburn (VA); Hybrid; USD 152,000 - 191,000; Full time

Benefits offered by this job

Equity compensation

Benefits on page

Job summary

Roblox is expanding its Data Center Network Engineering team to design, deploy, and operate the large-scale DC network that supports GPU clusters for AI workloads. The role emphasizes cross-team collaboration, qualification of new technologies, and hands-on deployment of high-speed networking.

Based in Ashburn, VA, this full-time position offers equity and benefits. You will engage with multiple groups to ensure scalable, reliable networking across Roblox's data centers and cloud integrations.

Qualifications

• 6+ years 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 TCP/IP, UDP, DHCP, DNS, IPv4/IPv6.
• Preferred: QoS, IS-IS, MPLS, RSVP-TE, DWDM, NAT, open-source hardware and software.

Responsibilities

• 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.

Skills

CLOS fabrics design

GPU/AI networking

400G/800G hardware

BGP troubleshooting

TCP/IP/UDP/DHCP/DNS

QoS/IS-IS/MPLS/RSVP-TE

NAT open‑source hardware/software

Job description

Roblox is expanding its Data Center Network Engineering team to design, deploy, and operate the large-scale DC network that supports GPU clusters for AI workloads. The role emphasizes cross-team collaboration, qualification of new technologies, and hands-on deployment of high-speed networking.

Based in Ashburn, VA, this full-time position offers equity and benefits. You will engage with multiple groups to ensure scalable, reliable networking across Roblox's data centers and cloud integrations.