Live opening · Posted 5 days ago

Network Engineer

Larsen & Toubro-Vyoma · Chennai, Tamil Nadu, India (On-site)

Linkedin No

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At a glance

The key details from the original listing.

Posted 5 days ago

CompanyLarsen & Toubro-Vyoma

LocationChennai, Tamil Nadu, India (On-site)

Work modeNo

SkillsTerraform

Source

ListedPosted 5 days ago

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About the role

Description supplied by the original job listing.

Job Purpose
Deliver and operate ultra‑low‑latency, high‑bisection network fabrics for GPU training at ~10K GPU scale with deterministic performance.
Roles & Responsibilities
Implementation
Build IB (HDR/NDR) east‑west fabrics and Ethernet north‑south connectivity; leaf‑spine with ECMP.
Deploy and tune RoCE v2, PFC/ECN, MTU, buffer profiles; IB routing/credit/timers; SHARP/UCX offloads where applicable.
Operations
Day‑2 fabric health (congestion hotspots, slow‑drain, link flaps); automate config with Ansible/Terraform.
Lifecycle of switch OS/firmware; link‑level optics and cable qualification; inventory and spares.
Performance & Optimization
Validate NCCL collectives performance across pods; troubleshoot all‑reduce bottlenecks and imbalance.
Implement QoS classes for training vs inference vs control‑plane.
Reliability & Incident
Lead P0/P1 critical incident response for NVIDIA GPU infrastructure, including InfiniBand, RoCE, Ethernet fabric and AI/ML cluster environments.
Troubleshot performance bottlenecks involving InfiniBand fabrics, RoCE networks, congestion management, NCCL communications, GPUDirect RDMA, and distributed AI training workloads.
Led post-incident reviews and implemented automation, monitoring enhancements, and architectural improvements to increase overall cluster availability, stability, and performance.
Create runbooks for path failures, fabric partitions, and credit starvation; design graceful degradation.
Security & Compliance
BGP/EVPN multi‑tenancy, ACLs, role‑based access to fabric managers; config signing/change control.
Experience & Educational Requirement
BE/B-Tech or equivalent with Computer Science or Electronics & Communication
Certifications:- NVIDIA Networking; CCNP/CCIE DC; JNCIP‑DC / Arista ACE.
RELEVANT EXPERIENCE
7–15 years DC networking; deep InfiniBand (HDR/NDR) and RoCE tuning at scale; GPU cluster comms patterns.
Tools / Tech
NVIDIA UFM/NetQ (or equivalent), Spectrum/Quantum families, Cumulus/Onyx/SONiC; iperf/NCCL‑tests; sFlow/telemetry; Ansible/Terraform.

Work arrangement
No

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