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# Software Engineer - AI/HPC Middleware

- **Company:** Cornelis Networks
- **Location:** New York, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, C++ (Programming Language), Profiling, Nvidia CUDA, Network Congestion, Linux, Middleware, Ethernet, Open Source Technology, Performance Tuning, Remote Direct Memory Access, System Programming, Performance Testing, Information Technology, Cerner CCL
- **Published:** August 17, 2026
- **Apply:** https://www.dice.com/job-detail/836951c9-bc1b-4701-aa45-1aae22746300

## About the Role

* 6+ years of experience in systems programming in C/C++ on Linux; Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience). Master's or Doctorate a plus.
 * Hands-on experience with HPC middleware internals (Open MPI, MPICH, MVAPICH, and/or SHMEM) or optimizing collective communications for AI, including NCCL/RCCL, CUDA/ROCm) and/or other CCL stacks.
 * Demonstrated ability to deliver low-latency/high-throughput communication paths and to diagnose performance issues using profiling/tracing tools.
 * Working knowledge of transport/integration layers such as OFI/libfabric, UCX, verbs-style concepts.
 * Solid background in RDMA concepts and performance tuning.
 * Experience contributing to open-source projects.

Preferred Qualifications

 * Prior experience developing or maintaining libfabric providers.
 * Familiarity with Ultra Ethernet (UEC/UET) specifications.
 * Experience with RoCEv2, congestion control, and/or Ethernet-based RDMA deployments.
 * Experience with cluster-scale benchmarking, profiling, and optimization.
 * Background with HPC fabrics, such as Omni-Path.

## Description

* AI/HPC Middleware Enablement & Optimization: Implement and help optimize features for HPC middleware (HPI and SHMEM) and AI middleware (CCL stacks ie: NCCL/RCCL and related collective communication libraries)
 * Transport & Integration: Assist in integrating middleware capabilities with underlying transports and provider layers (ie: libfabric / OFI, UCX, verbs-like semantics where applicable)
 * Upstream & Open-Source Leadership: Prepare and submit upstream contributions across MPI/SHMEM projects, CCL ecosystems, and related components
 * Cross-Stack Collaboration & Performance Validation: Collaborate with kernel/driver and switch teams to help deliver end-to-end performance aligned to the Cornelis product roadmap
 * Customer & Field Impact: Help analyze performance traces and reproduce customer issues, and assist in translating findings into fixes.


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