Ethernet Scale-Up Design Lead/Principal Engineer

TYLsemi • San Jose, CA

23d • $237,500 - $286,000

About The Position

TYLsemi is developing purpose-built connectivity chiplets for HPC/rack-scale AI systems. We are seeking a Principal Engineer Ethernet Scale-up to lead the architecture and design of next-generation Ethernet Scale-Up Networking (ESUN) solution. This is a high-impact technical role.

Requirements

• 15+ years of ASIC/SoC architecture and design experience.
• Proven track record delivering networking, NIC, switch, DPU, accelerator interconnect, or high-speed connectivity silicon.
• Deep expertise in SystemVerilog/RTL design and high-performance datapath architecture.
• Strong knowledge of Ethernet, RDMA, traffic management, congestion control, and scalable fabric architectures.
• Experience across the full ASIC lifecycle, from architecture to production silicon.

Nice To Haves

• Ultra Ethernet, UALink, RoCEv2, InfiniBand
• PCIe Gen6/Gen7, UCIe, CXL
• AI/HPC interconnects and collective communication acceleration
• 400G/800G/1.6T Ethernet systems
• High-speed SerDes and advanced networking architectures

Responsibilities

• Define architecture for Ethernet-based AI scale-up interconnects and accelerator fabrics.
• Lead development of high-performance Ethernet Subsystem microarchitectures including RDMA, packet processing, network offload, traffic management, congestion control, and reliability mechanisms.
• Drive execution from architecture through RTL, verification, physical design, silicon bring-up, and production.
• Optimize performance, latency, scalability, power, and reliability for demanding AI and HPC workloads.
• Collaborate across hardware, firmware, software, and system teams to deliver industry-leading AI networking solutions.
• Serve as a company-wide technical leader, influencing product strategy, roadmap, and architectural direction.

Benefits

• Define the future of AI infrastructure and rack-scale computing.
• Own architecture decisions with company-wide impact.
• Deliver technology that directly impacts AI performance, scalability, and efficiency.

What This Job Offers

• Job Type: Full-time
• Career Level: Principal
• Education Level: No Education Listed