{"id":4199483,"url":"https://alion.io/job/ishantechnologies-network-performance-engineer-gpuhpc","title":"Network Performance Engineer - GPU/HPC","company":{"id":3776410,"name":"Ishantechnologies","domain":"ishantechnologies.com","url":"https://alion.io/company/ishantechnologies","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"AI/ML","role_family":"AI/ML","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Ahmedabad, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"BGP","optional":false},{"name":"Grafana","optional":false},{"name":"HPC","optional":false},{"name":"InfiniBand","optional":false},{"name":"Kubernetes","optional":false},{"name":"MPI","optional":false},{"name":"NCCL","optional":false},{"name":"Prometheus","optional":false},{"name":"Python","optional":false},{"name":"VLAN","optional":false},{"name":"C","optional":true}],"status":"live","first_seen_at":"2026-11-12T21:35:00Z","employer_posted_date":null,"last_verified_at":"2026-11-12T21:35:00Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Ishan Technologies is looking for an experienced Network Performance Engineer to build, operate, optimise and maintain the high-performance network infrastructure supporting Saksham AI Services' 1000+ GPU cluster. The role will focus on backend GPU networking, high-speed Ethernet/RoCE and InfiniBand fabrics, front-end connectivity, storage and management networks. The ideal candidate should have strong hands-on experience in data centre networking, network performance optimisation, RDMA technologies, congestion control and collective communication benchmarking. The selected candidate will also act as an L2/L3 escalation point for network and performance-related issues raised by Ishan Technologies' 24x7 NOC team.\n\nKey Responsibilities:\nInstall, configure and operate high-speed backend GPU networks using RoCEv2/Ethernet or InfiniBand.\nManage front-end, storage and out-of-band management networks.\nConfigure and maintain switches, network interface cards (NICs), transceivers and fibre connectivity.\nWork on rail-optimised leaf-spine network architecture.\nMaintain network topology, cable mapping and infrastructure documentation.\nConfigure and optimise BGP, EVPN-VXLAN and leaf-spine network architecture.\nImplement congestion control mechanisms, including PFC, ECN/DCQCN, adaptive routing and QoS.\nMonitor network bandwidth, latency, packet loss, link flaps and congestion.\nTroubleshoot GPU-to-GPU communication and collective performance issues.\nEnsure full-bandwidth network performance across different workload and cluster sizes.\nManage RoCEv2 and InfiniBand fabrics for GPU/HPC environments.\nWork with NVIDIA UFM and InfiniBand management tools.\nConfigure and troubleshoot RDMA drivers, SR-IOV and GPUDirect RDMA.\nWork with NVIDIA ConnectX and AMD Pensando Pollara networking technologies.\nMaintain VLAN/VRF segmentation, PKeys and fabric-level tenant isolation.\nPerform collective communication benchmarking using RCCL, NCCL, MPI and related testing tools.\nConduct RDMA performance testing using perftest, ib_write_bw and ib_read_bw.\nWork with nccl-tests and rccl-tests to validate network performance.\nUnderstand how data, tensor and expert parallelism impact network utilisation.\nInvestigate slow-running AI jobs, communication bottlenecks and straggler GPUs.\nCollaborate with compute and MLOps teams to optimise AI workload performance.\nDevelop network monitoring dashboards using Prometheus and Grafana.\nMonitor switch health, link errors, optics performance and network congestion.\nAutomate network configurations, health checks and compliance activities using Python and Ansible.\nMaintain network performance baselines and conduct acceptance testing after infrastructure changes.\nSupport Kubernetes RDMA networking using Multus, SR-IOV device plugins and network operators.\nHandle L2/L3 network and performance escalations from the 24x7 NOC team.\nLead network incident investigations and root cause analysis.\nCoordinate with customers, solution architects, vendors and internal engineering teams.\nPlan and execute switch, NIC and optics firmware upgrades under change management.\nMaintain network runbooks, technical documentation and operational standards.\nSupport internet edge connectivity, peering and private customer network links.\n\nRequired Technical Skills:\nStrong hands-on experience in Data Centre Networking.\nExperience with RoCEv2 or InfiniBand networking.\nStrong understanding of BGP, EVPN-VXLAN and leaf-spine architecture.\nKnowledge of PFC, ECN/DCQCN, QoS and adaptive routing.\nExperience with RDMA, GPUDirect RDMA and SR-IOV.\nHands-on experience with NVIDIA ConnectX, Spectrum-X or AMD Pensando Pollara.\nKnowledge of RCCL, NCCL, MPI and collective communication benchmarking.\nExperience with NVIDIA UFM and InfiniBand management.\nUnderstanding of VLAN, VRF, PKeys and network tenant isolation.\nExperience with 400G/800G networking, optics and fibre connectivity.\nWorking knowledge of Python, Ansible and network automation.\nExperience with Prometheus, Grafana, SNMP and streaming telemetry.\n\nEducational Qualifications:\nBachelor's degree in Engineering or Technology.\nPreferred specialisations: Computer Science, Information Technology, Electronics, Telecommunications or related disciplines.\nRelevant data centre networking certifications will be an added advantage.\n\nPreferred Certifications:\nCisco CCNP/CCIE Data Center.\nArista ACE.\nJuniper JNCIP-DC.\nNVIDIA Networking (InfiniBand/Spectrum-X) certifications.\n\nExperience Requirements:\n6-10 years of overall professional experience.\nMinimum 4+ years of relevant experience in Data Centre Networking for GPU, HPC or hyperscale environments.\nHands-on experience with RoCEv2 or InfiniBand fabrics is essential.\nExperience with large-scale leaf-spine networks, cabling and optics is essential.\nExperience in RCCL/NCCL or MPI performance optimisation is preferred.\nExposure to AMD Pensando, NVIDIA Spectrum-X or ConnectX networking is preferred.\n\nKey Competencies:\nStrong troubleshooting and analytical skills.\nHands-on approach to network engineering and performance optimisation.\nAbility to handle critical production incidents under pressure.\nStrong ownership and root cause analysis capabilities.\nEffective communication with customers, NOC teams and technical stakeholders.\nWillingness to participate in a 24x7 on-call support rotation.\nAbility to learn and adapt to evolving AI and GPU networking technologies.\n\nKey Success Outcomes:\nStable, high-performance GPU networking infrastructure.\nFull-bandwidth collective communication across cluster workloads.\nVerified network isolation between multiple customers and tenants.\nImproved network performance and reduced communication bottlenecks.\nFaster resolution of network incidents and performance escalations.\nStandardised, automated and well-documented network operations.\nSkills\nData Center Networking, GPUDirect RDMA, InfiniBand, RDMA, RoCEv2, SR-IOV","description_format":"text","description_chars":5895,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-11-12T21:35:00Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":30,"reasons":["seen:0","win:early"],"computed_at":"2026-11-12T23:35:52Z"},"pay":null,"html_url":"https://alion.io/job/ishantechnologies-network-performance-engineer-gpuhpc","json_url":"https://alion.io/job/ishantechnologies-network-performance-engineer-gpuhpc.json","meta":{"generated_at":"2026-11-12T23:35:52Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":49900,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":3776410},"rest":"https://alion.io/mcp/rest/get_company?id=3776410"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fishantechnologies-network-performance-engineer-gpuhpc"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fishantechnologies-network-performance-engineer-gpuhpc"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fishantechnologies-network-performance-engineer-gpuhpc"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/ishantechnologies-network-performance-engineer-gpuhpc\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fishantechnologies-network-performance-engineer-gpuhpc"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4199483}},{"tool":"search_jobs","arguments":{"company":"ishantechnologies.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4199483},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}