Director - Host Software (AI/HPC)

TL;DR

Director - Host Software (AI/HPC): Leading the engineering team responsible for the host-side software ecosystem, including Linux kernel drivers and high-performance transport libraries, with an accent on system-level performance and ecosystem integration. Focus on designing low-latency communication paths, optimizing AI/HPC middleware, and scaling networking solutions for GPU/CPU clusters.

Location: Remote (Must be based in the United States)

Company

hirify.global delivers high-performance scale-out networking solutions for AI and HPC datacenters.

What you will do

• Lead and grow a high-performance host software organization focused on systems programming and ecosystem integration.
• Define and deliver the host software stack for future product generations, aligning capabilities with hardware features.
• Oversee the development of Linux kernel-mode drivers (netdev, RDMA, PCIe) with a focus on low-latency communication.
• Direct the implementation of user-mode libraries and protocol state machines such as libfabric/OFI providers.
• Optimize collective communication libraries (NCCL/RCCL) and MPI/SHMEM for AI/HPC frameworks.
• Partner with hardware, firmware, and switch software teams to ensure end-to-end system stability and performance.

Requirements

• 8+ years of experience in high-performance systems programming in C/C++ on Linux.
• Proven track record in technical leadership or management roles (Team Lead, Manager, or similar).
• Strong understanding of Linux kernel internals and networking transport protocols.
• Hands-on experience with RDMA or high-performance networking concepts.
• Must reside within the United States.

Nice to have

• 12+ years of experience in software engineering with significant time in director-level roles.
• Deep expertise in libfabric/OFI, UCX, or specific interconnects like Omni-Path, InfiniBand, or RoCE.
• Proven track record of meaningful contributions to major open-source projects like the Linux kernel.
• Master’s or PhD in Computer Science, Engineering, or a related discipline.

Culture & Benefits

• Competitive compensation package including equity, cash, and incentives.
• Comprehensive medical, dental, and vision coverage, plus disability and life insurance.
• 401(k) with company match.
• Open Time Off (OTO), sick time, bonding leave, and pregnancy disability leave.
• Flexible work environment collaborating with influential leaders in the semiconductor industry.