Senior Thermal Engineer

Hace 17 horas

Barcelona, Catalonia, España Semidynamics Jornada completa

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You will own the thermal path from die junction to facility water — on-die hotspots, package spreading, cold plate design, sled airflow and rack-level heat rejection. Senior IC role: you set the thermal budget the rest of the hardware team designs against. What you will work on:
• Thermal solution for a multi-die AI accelerator at high TDP
• Liquid cooling: cold plate, manifold, loop design and facility interface
• Die-level hotspot and transient thermal analysis using power maps
• Sled, shelf and rack thermal architecture, including hybrid air and liquid
• Thermal telemetry, throttling policy and thermal-aware power management

Responsibilities:
• Analysis & modelling: Build detailed and compact thermal models of die, package and board. Run CFD and conjugate heat transfer studies for cold plate, sled and rack. Perform transient analysis against real workload power profiles, not just steady-state TDP.
• Solution design: Specify cold plate geometry, flow rate, pressure drop and TIM stack. Define thermal interface requirements and bond line targets, and own the junction temperature budget across all rails and dies.
• System & rack: Define flow distribution, coolant temperature and approach, redundancy behaviour and failure response. Set the thermal design envelope for the sled and the rack it sits in.
• Validation & cross-functional: Own thermal validation on real silicon — instrumentation, on-die sensor correlation, flow and pressure measurement. Partner with mechanical on mounting and load, with power on throttling policy, and with cooling vendors on components and qualification.

Requirements:
• 8+ years in electronics thermal engineering for high-power computing, datacentre or comparable systems
• Proven thermal ownership of a processor, GPU, ASIC or FPGA at high TDP, including package-level analysis
• Strong CFD and thermal simulation experience — Icepak, Flotherm, Star-CCM+ or equivalent
• Liquid cooling design

experience:
cold plates, flow and pressure budgets, loop behaviour
• Working knowledge of TIM selection, bond line control and thermal interface reliability
• Hands-on thermal validation and model-to-measurement correlation Nice to Have:
• 2.5D, interposer or chiplet package thermal co-design
• Two-phase, immersion or direct-to-chip cooling experience
• OCP rack cooling standards, ORv3, or facility water interface design
• Electro-thermal co-simulation with power delivery and PDN teams
• Python for automation, model generation and test data analysis Why Semidynamics?
• Work for one of Europe’s most promising deep-tech semiconductor scale-ups.
• Accelerated development path.
• 4 days per week in the Barcelona office (city center), 1 day WFH.
• 1 week of work from everywhere in the world.
• Competitive package.
• A collaborative, technical, and growth-oriented environment that values direct ownership and clear thinking.

Senior Thermal Engineer

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