Greenhouse ·
full-timeSenior Network Engineer - Data Center Networking
Roblox · San Mateo, CA, United States
Roblox operates a platform where millions of users create, play, and interact in user‑generated 3D experiences, relying on a global infrastructure that supports developer tools and live services. The Data Center Network Engineering pod within the Physical Networking team designs, deploys, and runs Roblox’s large‑scale data center fabric, handling server‑layer connectivity, intra‑ and inter‑DC links, and the networking for GPU clusters that power AI training and inference workloads. In this role you will drive the architecture and rollout of high‑performance fabrics, evaluate and validate new 400G/800G hardware, configure and troubleshoot extensive BGP deployments, and work closely with Network Reliability, Data Center Ops, Capacity Planning, Supply Chain, and Compute/ML groups to anticipate and resolve network issues. You will also contribute to automation and telemetry initiatives that improve efficiency, reliability, and visibility. The position suits engineers with six or more years of experience building CLOS‑based data center networks, hands‑on exposure to GPU/AI‑focused networking, proficiency with 400G/800G equipment, strong BGP and TCP/IP fundamentals, and familiarity with technologies such as QoS, IS‑IS, MPLS, RSVP‑TE, DWDM, or open‑source networking stacks.
Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. The Data Center Network Engineering (DNE) is a pod within the Physical Networking team and owns the design, deployment, and operation of Roblox's large-scale data center network. This includes server-layer connectivity, intra and inter-DC connectivity. The team is building High-Performance Networking (HPN) fabrics, deploying 400G/800G networking, and scaling GPU clusters to support AI training and inference. You will: 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. You have: 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. Preferred: QoS, IS-IS, MPLS, RSVP-TE, DWDM, commercial NAT, open-source hardware and software. For roles that are based at our headquarters in San Mateo, CA: The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits as described on this page . Annual Salary Range $243,290 — $295,250 USD Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted). Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws. Roblox also provides reasonable accommodations to candidates with qualifying disabilities or religious beliefs during the recruiting process. For US based roles only, please note the Company may not be able to employ candidates for this role who have United States work authorization related to certain U.S. visa categories, or support future H-1B sponsorship at this time.
| Role | Senior Network Engineer - Data Center Networking |
|---|---|
| Company | Roblox |
| Location | San Mateo, CA, United States |
| Type | full-time |
| Compensation | Not disclosed |
| Posted | 2026-10-07 |
| Deadline | Rolling |
Typical process for this type of role
A general guide — the exact steps for this specific listing may vary; check the original posting for details.
- 1ApplicationSubmit your resume through the apply link.
- 2ScreeningRecruiter reviews your background against the role.
- 3AssessmentA technical test, assignment, or coding round, depending on the role.
- 4Interview(s)One or more rounds with the hiring team.
- 5OfferOffer letter with compensation and start date.
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