Senior HPC Developer (RDMA Networking)

TL;DR

Senior HPC Developer (C++/RDMA): Building and optimizing high-performance GPU and networking subsystems for AI fabrics with an accent on cross-stack observability and workload fault tolerance. Focus on debugging performance issues across kernel, driver, and network layers to maximize GPU cluster utilization.

Location: On Site, Palo Alto, California

Salary: $150,000 - $230,000

Company

hirify.global Systems is pioneering a software-driven approach to AI fabrics to increase GPU cluster utilization through cross-stack observability and performance acceleration.

What you will do

• Build and optimize high-performance GPU and networking subsystems.
• Work with collective communication libraries and algorithms for multi-node, multi-GPU workloads.
• Debug performance issues across kernel, driver, GPU, and network layers.
• Develop and improve GPU-aware networking solutions.
• Profile, analyze, and tune system performance using low-level tooling.
• Collaborate with a small engineering team and take ownership of core systems.

Requirements

• 5+ years of experience in systems, HPC, or performance-critical software development.
• Strong proficiency in low-level C/C++.
• Solid understanding of RDMA networking, including InfiniBand, RoCE, and IBVerbs.
• Experience working with multi-node, multi-GPU workloads.
• Familiarity with collective communication libraries and communication algorithms.
• Ability and willingness to debug complex issues across hardware and software boundaries.

Nice to have

• Experience with congestion control mechanisms such as DCQCN.
• Exposure to GPU-aware networking or advanced communication optimizations.
• Experience with performance profiling, tracing, or observability tooling.
• Background in AI infrastructure, HPC clusters, or distributed systems.

Culture & Benefits

• Challenging projects in a fast-moving startup environment.
• Friendly and inclusive workplace culture.
• Competitive compensation and a comprehensive benefits package.
• Catered lunch.