Semiconductor Jobs

Silicon Infrastructure Engineer

This role involves developing and maintaining infrastructure tooling for silicon design, focusing on EDA workflows, build systems, and compute environments. The engineer will create cacheable, reproducible workflows, support EDA tools across the chip lifecycle, and manage cloud or on-premise infrastructure using IaC. Work includes deployment, monitoring, and optimisation of high-performance computing systems used by silicon engineering teams.

Fractile London, United Kingdom

Hybrid Permanent Clearance Required

Senior/Principal Physical Design Engineer

This role involves end-to-end physical implementation of advanced ASIC/SoC designs for AI accelerators, including floorplanning, placement, clock tree synthesis, routing, and sign-off. The engineer will optimise for performance, power, and area (PPA) using industry-standard EDA tools and collaborate closely with RTL, architecture, and process technology teams. Focus areas include timing closure, low-power design, and manufacturability for cutting-edge nodes like 7nm and below.

Fractile London, United Kingdom

On-site Permanent

Senior Processor Architect

Fractile is building silicon, systems and software which will redefine the frontier of AI: running the world’s most advanced models at radically higher speed and lower cost. We have an exceptional team across hardware and software capable of bringing about...

Fractile London, United Kingdom

Senior System Architect

Fractile is building silicon, systems and software which will redefine the frontier of AI: running the world’s most advanced models at radically higher speed and lower cost. We have an exceptional team across hardware and software capable of bringing about...

Fractile London, United Kingdom

Senior Embedded Performance Engineer

This role involves developing and optimizing low-level runtime software for a next-generation AI inference chip, focusing on performance-critical ML kernels in C and assembly. The engineer will drive early silicon evaluation, create microbenchmarks, and collaborate closely with hardware, compiler, and simulation teams to deliver measurable performance gains. Work spans from firmware-level control paths to profiling and regression tracking in a tightly integrated hardware-software environment.

Fractile London, United Kingdom

Senior Linux Kernel Driver Engineer

Design and develop high-performance Linux kernel drivers for an AI inference accelerator, focusing on PCIe, DMA, memory management, and interrupt handling. Work closely with hardware, firmware, and ML teams in a co-design environment from pre-silicon through performance optimization. Build robust, low-latency kernel-space paths and stable userspace interfaces critical to system throughput and latency.

Fractile London, United Kingdom

Senior Simulation Engineer

Develop and maintain a functional simulator for Fractile’s custom AI accelerator hardware, enabling early software development and validation prior to silicon availability. Collaborate closely with hardware, firmware, runtime, and compiler teams to model low-level behaviours including MMIO, interrupts, DMA, concurrency, and error handling. Ensure simulator scalability, reproducibility, and integration into CI workflows while supporting end-to-end system validation across distributed environments.

Fractile London, United Kingdom

Senior Verification Engineer

This role involves leading pre-silicon RTL verification for AI-focused integrated circuits, developing testbenches, functional models, and coverage strategies to ensure high-quality tape-outs. The engineer will collaborate closely with RTL design, system architecture, and software teams in a fast-paced, full-stack environment. Emphasis is placed on improving verification methodologies, leveraging software-driven approaches, and contributing to architectural discussions in a highly collaborative, technically rigorous team.

Fractile London, United Kingdom

On-site Permanent Clearance Required

Verification Engineer

Work as a Silicon Verification Engineer on AI-focused IC development, verifying RTL for data centre-scale ML/AI chips. Collaborate across hardware and software teams to build high-quality silicon using modern methodologies including Cocotb and Bazel. Engage in specification, architecture, and verification planning in a fast-paced, full-stack environment.

Fractile London, United Kingdom

On-site Permanent