Senior Hardware Engineer in England

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 this change, and we are growing fast to meet demand and deliver our product at scale.

We are seeking a Hardware Electronics Design Engineer to design, develop, and validate high‑speed and high‑power electronic systems. This role involves schematic design, PCB development, signal and power integrity, and hands‑on bring‑up of complex hardware. The engineer will work closely with system, mechanical, firmware, and manufacturing teams to deliver reliable, high‑performance products from concept through production.

The ideal candidate has deep experience with high‑speed interfaces and power delivery, and is comfortable owning designs through debugging, validation, and manufacturing release.

• Design and develop high‑speed (PCIe/Ethernet) electronic circuits and systems
• Design power delivery networks (PDN) including DC‑DC converters, multi‑phase VRMs, and protection circuits
• Create schematics, BOMs, and design documentation for complex PCBs
• Lead board‑level architecture decisions including power topology, interface selection, and component choice
• Work with PCB layout engineers to ensure proper stack‑ups, routing, and return paths
• Address thermal considerations in collaboration with mechanical and thermal teams
• Lead board bring‑up, debug, and root‑cause analysis of hardware issues
• Use lab equipment (oscilloscopes, network analysers, power analysers) to validate performance
• Support compliance, reliability, and environmental testing
• Support DFM/DFT reviews and transition designs into manufacturing

• Diploma, Bachelor’s or Master’s degree in Electrical or Electronic Engineering, or equivalent experience
• 7+ years of experience in hardware electronics design
• Proven experience designing high‑speed digital and high‑power circuits
• Experience taking designs from concept through production

• High‑speed digital design (DDR, PCIe, Ethernet, SerDes)
• Power electronics and PDN design (buck/boost converters, VRMs, protection)
• Signal integrity (SI) and power integrity (PI) principles
• Schematic capture and PCB tools (Xpedition, Altium, Cadence, or equivalent)
• Hardware debug and lab instrumentation

• Experience with multi‑layer high‑speed PCBs (10+ layers)
• Familiarity with SI/PI simulation tools
• Experience with compliance testing (EMI/EMC, safety)
• Experience with AI accelerator or HPC hardware
• Thermal Management: Knowledge of techniques to manage heat dissipation in high‑power systems

• Ownership and execution: you will have full agency to drive your work forward
• Rapid iteration: we all work directly with top leadership to move from idea to hardware on ambitious timelines
• Full‑stack engagement: hardware, software, silicon, and modelling teams all work closely together to create a product with generational impact
• Optimistic and pragmatic: we possess the will to win, and to do the hard work to get us there
• Team player mentality: the mission is bigger than any of us, and we have the curiosity and technical focus to see the best idea shipped, no matter who’s it is

• Founded in 2022, team of 70+ which is expanding rapidly
• Modern, open offices in London and Bristol
• Collaborative, problem‑solving culture built on deep curiosity, entrepreneurial initiative and technical fluency

Export control and security clearance: Certain roles may involve working on technologies subject to export restrictions. Applicants may be required to undergo additional eligibility checks to ensure compliance with applicable law.