Senior HPC Developer (RDMA Networking)

Location: On-site in Palo Alto, California, United States

Base salary: $150,000–$230,000 per year. The compensation package may also include stock options or other equity awards.

Company

hirify.global is a startup founded by Stanford researchers and systems engineers that develops software-driven fabrics for improving GPU cluster utilization through observability, fault tolerance, and performance acceleration.

What you will do

• Build and optimize high-performance GPU and networking subsystems.
• Develop 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 own 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 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 involving GPU clusters and high-performance networking.
• Friendly and inclusive workplace culture.
• Competitive compensation and benefits package.
• Catered lunch.