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Salary: USD 151,820 - 191,250 / annual
Roblox is seeking a Senior Network Engineer to join the Data Center Network Engineering (DNE) pod within the Physical Networking team. This role owns the design, deployment, and operation of Roblox's large-scale data center network infrastructure, including server-layer connectivity, intra and inter-datacenter connectivity, high-performance networking (HPN) fabrics, and GPU cluster networking for AI training and inference workloads.
In this role, you will drive the design, deployment, and operations of Roblox's large-scale data center network, including networking for GPU clusters supporting training and inference workloads. You will design, qualify, and validate new technologies and hardware for scalable solutions. You will coordinate data center builds and projects with multiple teams through weekly cross-team calls, working closely with Network Reliability Systems, Data Center Ops, Capacity Planning, Supply Chain, and Compute/ML teams to address network challenges early. You will also contribute to automation and telemetry initiatives that improve efficiency, reliability, and visibility across the infrastructure.
Roblox's platform serves tens of millions of users daily who explore, create, play, learn, and connect in 3D immersive digital experiences. The company is building tools and infrastructure to support this scale while maintaining safety and civility.
Workplace: Onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday.
Requirements:
- 6+ years of expertise designing and deploying large-scale data center fabrics (CLOS architecture)
- 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
- Preferred: QoS, IS-IS, MPLS, RSVP-TE, DWDM, commercial NAT, open-source hardware and software
