Senior InfiniBand & RoCE Architect for GPU Cloud

Bitdeer

Singapore

On-site

SGD 120,000 - 160,000

Full time

14 days+

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Job summary

Bitdeer is seeking a senior data center networking engineer in Singapore to design and operate InfiniBand and RoCE fabrics for GPU clusters. You will monitor and tune IB/RoCE performance, implement NCCL topology mappings, and coordinate with Nvidia/Mellanox for escalations, bugs, and RMA.

The role emphasizes validating telemetry, building dashboards, and enabling runbooks as code to support scalable, fault-tolerant fabric operations.

Qualifications

5+ years in data center networking, with at least 3 years focused on InfiniBand or RoCE fabrics.
Hands-on experience deploying and operating Nvidia/Mellanox InfiniBand switches at scale.
Strong understanding of IB subnet management, partitioning, and QoS.
Experience with RoCEv2 deployment including PFC, ECN, DCQCN configuration.
Proficiency with UFM or equivalent IB fabric management tools.

Responsibilities

Xxxxxxx
InfiniBand fabrics: fat-tree, rail-optimized, and dragonfly topologies for GPU clusters of 100-10,000 GPUs.
RoCEv2 networks across Nvidia, Arista, and Cisco platforms for RDMA workloads.
UFM (Unified Fabric Manager) for IB fabric monitoring, diagnostics, and subnet management.
IB and RoCE performance monitoring and tuning: adaptive routing, congestion control (DCQCN/ECN), traffic isolation.
NCCL communication tuning: topology detection, ring/tree algorithm selection, GDR configuration.
Firmware lifecycle across IB switches and HCAs.
Fault diagnosis: link flaps, symbol errors, packet drops, routing anomalies, credit stalls.
Coordination with Nvidia/Mellanox support for escalations, bugs, and RMA.