Clockwork Systems, Inc.

Clockwork Systems, Inc.

Senior HPC Developer - RDMA Networking

On Site, Palo Alto, California · Senior

Sponsorship not specified$150k-$230kDetected 14 days ago
C++CLinuxSystems Engineering

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odds of building a lasting career here

59Sponsors, lottery-bound
Cap-exempt (no lottery)0
Sponsors this role80
Entry-level history0
PERM / green-card track0
Lottery odds (Level IV)94
Fits your clock70

Sponsors, but it's cap-subject — you still face the weighted lottery (~61% per draw at Level IV). Good if you win; have a cap-exempt backup on your list.

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Files H-1B transfers

1 transfer filing in the last year, covering 1 worker. Median labor-condition decision: 10 days. An employer that already files transfers is one that can take over an existing H-1B.

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About the role

  • You'll work across RDMA networking and storage data paths, spanning compute hosts, NICs, DPUs, smart switches, storage systems, and the Linux software stack.
  • The work includes RoCE networking, NVMe-over-Fabrics, congestion control, performance optimization, programmable network hardware, and debugging complex interactions across hardware and software.

Responsibilities

  • Design, build, and optimize high-performance RDMA networking and storage systems
  • Develop systems that leverage DPUs, SmartNICs, and programmable switches for packet processing, telemetry, control, and data-path acceleration
  • Develop and optimize software using queue pairs, completion queues, memory registration, zero-copy I/O, and other RDMA primitives
  • Develop mechanisms to improve network performance and congestion behavior in high-bandwidth RDMA fabrics
  • Build tooling and instrumentation to understand end-to-end performance across compute, network, and storage
  • Own major components from design through implementation, performance validation, and deployment
  • We are committed to building world-class teams by welcoming bright, passionate individuals from all backgrounds.
  • We believe diversity drives innovation, and we grow stronger together.

Requirements

  • 5+ years of experience in systems, networking, storage, HPC, or other performance-critical software development
  • Strong proficiency in low-level C/C++
  • Strong understanding of RDMA networking, including RoCE and RDMA Verbs
  • Strong understanding of networking fundamentals, including packet processing, queues, congestion, and flow control
  • Experience debugging low-level Linux networking, storage, or driver behavior
  • Familiarity with concepts such as DMA, memory registration, queue pairs, completion queues, interrupts/polling, and zero-copy I/O
  • Experience profiling and optimizing latency- and throughput-sensitive systems
  • Ability to reason across hardware and software boundaries and independently debug complex system-level problems
  • Experience with DPUs, SmartNICs, or programmable network hardware
  • Experience with platforms such as NVIDIA BlueField or programmable switch environments

Compensation

  • For candidates hired at the posted level, the expected base salary range is $150,000-$230,000.
  • The offered compensation package may also include stock options or other equity awards, subject to Clockwork's equity program and applicable approvals.

Benefits

  • for this position will vary based on the skills and experience you bring, as well as internal equity considerations.

Company info

  • About Clockwork Systems
  • Clockwork.io - Software Driven Fabrics to increase GPU cluster utilization
  • Clockwork Systems was founded by Stanford researchers and veteran systems engineers who share a vision for redefining the foundations of distributed computing.
  • As AI workloads grow increasingly complex, traditional infrastructure struggles to meet the demands of performance, reliability, and precise coordination.
  • Clockwork is pioneering a software-driven approach to AI fabrics by delivering cross-stack observability to catch and quickly resolve problems, workload fault tolerance to keep jobs running through failures, and performance acceleration that dynamically routes and paces traffic to avoid congestion.
  • To learn more, visit www.clockwork.io.

Equal opportunity

  • Clockwork Systems is an equal opportunity employer.
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