Thermo Mechanical Engineer

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 Thermal Engineer with deep experience in data centre or high-density system design, someone who can guide and shape the development of advanced cooling architectures. You might be a mechanical engineer who has specialised in thermal design, or a thermal systems expert with strong modelling and integration experience. Either way, you’ll be comfortable leading design direction and working hands-on with suppliers, prototypes, and test rigs. We are open to a contractor or permanent hires, we are most interested in finding someone who can add real expertise when it’s needed, help define the right path, and guide the build of a robust, production-ready cooling solution. The Role You will lead the design of an advanced cooling system for a high-density AI accelerator system destined for data centre deployment. This includes developing the full cooling architecture — from Direct-to-Chip (D2C) liquid cooling through to rack-level thermal management and hybrid liquid-air solutions for host chassis.