{"id":1965562,"url":"https://alion.io/job/clockwork-senior-hpc-developer-rdma-networking","title":"Senior HPC Developer - RDMA Networking","company":{"id":39049,"name":"Clockwork","domain":"clockwork.io","url":"https://alion.io/company/clockwork-io","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":95,"open_postings":8,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":130,"computed_at":"2026-10-12T06:55:09Z"}},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Palo Alto, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":150000,"max":230000,"currency":"USD","period":"year","gross":null,"usd_annual":230000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"C++","optional":false},{"name":"HPC","optional":false},{"name":"Linux","optional":false}],"status":"live","first_seen_at":"2026-10-06T17:02:51Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-10-12T17:52:14Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"About Clockwork Systems\nClockwork.io - Software Driven Fabrics to increase GPU cluster utilization\nClockwork 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.\nTo learn more, visitwww.clockwork.io.\nAbout the Role\nWe’re looking for a Senior Systems Engineer - RDMA Networking & Storage to help build and optimize high-performance infrastructure for AI and HPC systems.\nYou’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.\nThis role is ideal for an experienced systems engineer who enjoys working close to the hardware, diagnosing difficult performance problems, and building reliable systems where latency, throughput, and network behavior matter.\nWhat You’ll Do\nDesign, build, and optimize high-performance RDMA networking and storage systems\nWork with RoCE, RDMA Verbs, and NVMe-over-Fabrics\nDevelop systems that leverage DPUs, SmartNICs, and programmable switches for packet processing, telemetry, control, and data-path acceleration\nDevelop and optimize software using queue pairs, completion queues, memory registration, zero-copy I/O, and other RDMA primitives\nDebug performance and reliability issues across applications, Linux kernel, drivers, NICs, DPUs, switches, and storage systems\nAnalyze network and storage behavior including latency, throughput, queueing, congestion, packet loss, retransmissions, and flow control\nDevelop mechanisms to improve network performance and congestion behavior in high-bandwidth RDMA fabrics\nBuild tooling and instrumentation to understand end-to-end performance across compute, network, and storage\nProfile and tune systems across PCIe, NUMA, CPU, memory, NIC, DPU, network, and storage boundaries\nOwn major components from design through implementation, performance validation, and deployment\nWhat You Bring\n5+ years of experience in systems, networking, storage, HPC, or other performance-critical software development\nStrong proficiency in low-level C/C++\nStrong understanding of RDMA networking, including RoCE and RDMA Verbs\nStrong understanding of networking fundamentals, including packet processing, queues, congestion, and flow control\nExperience debugging low-level Linux networking, storage, or driver behavior\nFamiliarity with concepts such as DMA, memory registration, queue pairs, completion queues, interrupts/polling, and zero-copy I/O\nExperience profiling and optimizing latency- and throughput-sensitive systems\nAbility to reason across hardware and software boundaries and independently debug complex system-level problems\nStrong ownership and comfort working in a small, fast-moving engineering team\nBonus Points\nExperience with DPUs, SmartNICs, or programmable network hardware\nExperience with platforms such as NVIDIA BlueField or programmable switch environments\nExperience with P4, switch SDKs, or in-network packet processing\nExperience with NVMe, NVMe-oF, NVMe/RDMA, or NVMe/TCP\nExperience with SPDK, DPDK, or other userspace I/O frameworks\nExperience with Linux NVMe and RDMA subsystems\nExperience with congestion control, including DCQCN, ECN, PFC, or related mechanisms\nExperience tuning NVIDIA/Mellanox ConnectX NICs and RoCE fabrics\nExperience working with high-performance switches and data-center network fabrics\nExperience with PCIe, NUMA, huge pages, DMA, or CPU affinity optimization\nExperience with performance profiling, tracing, or observability tooling\nBackground in AI infrastructure, HPC clusters, distributed storage, or large-scale data-center systems\nEnjoy\nChallenging, technically deep projects\nA friendly and inclusive workplace culture\nCompetitive compensation\nA great benefits package\nCatered lunch\nCompensation for this position will vary based on the skills and experience you bring, as well as internal equity considerations. 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.\nClockwork Systems is an equal opportunity employer. We are committed to building world-class teams by welcoming bright, passionate individuals from all backgrounds. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, religion, age, sex, sexual orientation, gender identity or expression, national origin, disability, or protected veteran status. 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