Senior Software Engineer– Networking and Drivers

About Xsight Labs

Xsight Labs is a pre-IPO silicon startup based in Israel with development offices in Boston MA, Durham NC, and San Jose, CA. Named one of the 10 hottest semiconductor startups of 2025, Xsight is developing and delivering revolutionary new silicon devices to address the cloud datacenter core and edge at scale. Xsight is well funded by some of the leading investments firms in the world including Intel Capital, Microsoft, Fidelity, and Atreides. Come join our team and be part of revolutionizing the future of the cloud!

About the role

As a Senior Software Engineer, in the Networking/Drivers team, you’ll lead design and development of low-level, high-throughput data paths and device drivers in C, work closely with silicon, firmware, and validation teams, and mentor junior engineers. You’ll own features end-to-end—from architecture to lab bring-up and performance tuning. What you’ll do:

• Lead design and implementation of user-space and driver components (packet I/O, control paths, performance tooling).

• Drive SW/HW integration and board bring-up; reproduce and root-cause complex issues across layers (driver, firmware, silicon).

• Optimize throughput, latency, and CPU utilization; add profiling, tracing, and automated tests to prevent regressions.

• Collaborate in cross-functional design reviews; document designs and guide best practices in code quality and testing.

• Mentor teammates through reviews, pairing, and technical guidance.

Required Experience:

• 4+ years of hands-on software development in C on Linux.

• Proven experience in the networking field (e.g., NICs, switches, packet processing, data-plane/IO stacks).

• Strong systems fundamentals: concurrency, memory management, performance profiling, and debugging (gdb, perf, ftrace, tcpdump/Wireshark).

• Excellent communication skills; ability to lead projects and collaborate across teams.

Preferred Qualifications

• Device driver design, development, debugging, and testing experience (kernel-adjacent or user-space drivers).

• DPDK user-space application and fast-path development experience.

• SW/HW integration and lab experience (PCIe, DMA, interrupts, counters/telemetry, bring-up).

• Knowledge of networking protocols (Ethernet/IP/TCP/UDP), congestion/flow control, and high-rate packet processing.

• Familiarity with CI/CD, unit/integration testing, and production observability.

• Big advantage: Knowledge of RDMA (verbs, QPs, completion model, transport semantics) and experience building or tuning RDMA data paths.

Education

• BsC or BSEE

• MSc or MsEE – an advantage