Senior Software Engineer - HPC & Low-Level Systems

Job DescriptionJob Description Clockwork.io is a Silicon Valley startup that delivers state-of-the-art AI compute acceleration. We are founded by Stanford researchers and veteran systems engineers with a shared belief: distributed systems powering modern AI require a new approach to managing time, reliability, and performance. Unlike traditional solutions that rely on specialized hardware or embedded telemetry in switches, Clockwork's system brings insane visibility, resilience, acceleration and efficiency to the network layer entirely through software. As AI workloads continue to scale in size, urgency, and impact, networks must evolve to keep up. Clockwork exists to make that evolution possible. About Us Clockwork.io - A Software-Driven Revolution in AI Networking 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 networking, delivering deterministic time, ultra-low latency, and seamless scalability for modern distributed systems. To learn more, visit www.clockwork.io . What you will do Use your knowledge and experience to lead/contribute directly to the design and build of high performance, reliable and scalable systems. You bring At least 5 years of experience with C/C++ systems programming Deep knowledge of Linux internals (e.g., system calls, memory management, kernel modules) Strong foundation in concurrent programming and synchronization techniques Strong understanding of the TCP/IP stack, socket programming, and low-latency networking (e.g., RDMA, DPDK, XDP) Strong understanding of memory hierarchy, CPU caches, multi-core architectures, and GPUs Strong skills in systems design, performance analysis, and low-level debugging Nice to Have Contributions to open-source HPC libraries or Linux kernel subsystems Experience with performance tuning of large-scale HPC clusters Experience with MPI, RPC frameworks, or distributed runtimes Experience with NCCL, CUDA and GPU Kernels Knowledge of RDMA APIs (e.g., libibverbs) and transport semantics Experience with NIC drivers or NIC architecture Enjoy Challenging projects. Competitive compensation. A great benefits package. A friendly and inclusive workplace culture. Catered lunches. Working in the heart of Silicon Valley. Clockwork is assembling world class teams to build cutting edge software. We look for bright people from all walks of life and we grow together. All qualified applicants will receive consideration for employment without regard to , color, ancestry, , , , sexual , , origin, or protected veteran status and will not be discriminated against on the basis of . #J-18808-Ljbffr