Principal Firmware/Middleware Engineer at Renesas Electronics — Chandler, AZ

As the Principal Firmware Architect for UALink Switch Products, you will serve as the technical visionary responsible for defining, designing, and driving the end-to-end embedded software and firmware architecture for our next-generation AI cluster scale-up switches.

In this high-impact role, you will bridge the gap between cutting-edge silicon (ASICs) and upper-layer cluster orchestration software. You will define how firmware manages complex scale-up topologies, ensures raw hardware performance (maximizing bandwidth and minimizing latency), and maintains absolute reliability across thousands of connected AI accelerators.

• Architectural Definition & Design
• Fabric Firmware Architecture: Architect and specify the low-level firmware running on internal microcontrollers within the UALink Switch ASIC.
• Hardware-Software Co-Design: Collaborate heavily with ASIC design, logic design (RTL), and verification teams to define hardware-software interfaces, registers, scratchpads, and memory maps.
• Protocol Implementation: Define the firmware stack to support UALink physical, link, and transport layers, managing credits, routing tables, and flow control.
• Initialization, Boot, & Fabric Management
• Link Initialization & Training: Design deterministic, fast link-training state machines to bring up ultra-high-speed die-to-die and chassis-to-chassis UALink connections.
• Topology Discovery & Routing: Architect efficient algorithms for runtime topology discovery, dynamic routing, and credit management to prevent fabric congestion.
• Platform Orchestration: Lead the design of SDKs and APIs that expose switch functionality to baseboard management controllers (BMCs) using OpenBMC and Redfish APIs.
• Performance, RAS, & Security
• Latency & Bandwidth Optimization: Fine-tune bare-metal execution paths to guarantee deterministic low latency for collective communication primitives (e.g., All-Reduce, All-to-All).
• Advanced RAS (Reliability, Availability, Serviceability): Design robust error-handling, telemetry, and fault-isolation micro-architectures (e.g., link degradation fallback, FEC, and error containment).
• Security & Root of Trust: Implement secure boot, cryptographic firmware authentication, and runtime attestation to ensure fabric integrity.

Education & Experience

• Degree: Bachelor’s or Master’s/Ph.D. in Computer Engineering, Electrical Engineering, Computer Science, or a related discipline.
• Experience: 15+ years of hands-on experience in embedded systems, server platform architecture, or low-level silicon firmware development.

Technical Skill Set

• Language Masteries: Expert-level proficiency in C for bare-metal and RTOS environments (e.g., ThreadX, FreeRTOS, Zephyr) and Python for hardware automation and modeling.
• Protocol Expertise: Deep technical understanding of high-speed scale-up/scale-out interconnect protocols (UALink, NVLink, CXL, or PCIe Gen5/Gen6).
• Network Switching Concepts: Comprehensive knowledge of credit-based flow control, packet routing, physical layer (PHY) equalization, and SerDes management.
• Tooling: Strong familiarity with hardware debuggers (JTAG, Lauterbach Lauterbach/TRACE32) and lab equipment (Oscilloscopes, PCIe/Protocol Analyzers).