Senior HPC Developer - RDMA Networking
Clockwork.io4 hours ago
Base Salary
$150k - $230k/yr
Responsibilities
- 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 the 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 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.
- Bonus: experience with DCQCN, GPU-aware networking, advanced communication optimizations, performance profiling, tracing, observability tooling, AI infrastructure, HPC clusters, or distributed systems.
Benefits
- Competitive compensation with an expected base salary range of $150,000–$230,000 for candidates hired at the posted level.
- Stock options or other equity awards may be included, subject to the company’s equity program and applicable approvals.
- Great benefits package.
- Catered lunch.
- Friendly and inclusive workplace culture.
About Clockwork.io
Clockwork.io pioneers Software-Driven AI Fabrics™, delivering a programmable software layer that makes large-scale AI clusters observable, deterministic, and resilient by design to drive continuous workload progress and peak cluster utilization. Its FleetIQ platform enables enterprises to train, deploy, and serve the world's most demanding AI workloads faster, more reliably, and at lower cost. Companies including Uber, Wells Fargo, DCAI, Nebius, Nscale, and White Fiber trust Clockwork.io to power their AI infrastructure. Learn more at www.clockwork.io