Hardware Design Engineer

You will own board designs end to end — architecture, schematic capture, component selection, layout direction and the design reviews that get them built. This is a hands-on ownership role: the boards you design are the ones the team brings up, debugs and ships. What you will work on: • Schematic design and ownership of boards for an AI accelerator platform • Component selection and sourcing trade-offs, from silicon to passives • Layout direction and constraint definition, working alongside PCB designers • Design reviews, DFx and the path from prototype through to production • Respins and ECOs driven by test, bring-up and field feedback Responsibilities: • Schematic capture & ownership: Own the full schematic for assigned boards — architecture, block partitioning, interface definition, power tree and sequencing. Maintain the design through revisions, ECOs and respins. • Component selection: Select and specify components against electrical, thermal, cost, lifecycle and supply constraints. Own the BOM, including second sourcing and obsolescence risk. • Layout direction: Define stackup, placement intent, routing constraints and keep-outs. Review layout against SI, PI, power and thermal requirements, and drive the iterations to closure. • Design verification: Run circuit-level simulation where it matters, build and check timing and interface budgets, and perform worst-case analysis on critical nets and rails. • Cross-functional & lifecycle: Work with SI/PI, power, thermal, mechanical and firmware teams to fold their requirements into the design. Drive formal design reviews, hand the board off cleanly to the bring-up team with the documentation they need, and take it through NPI with manufacturing partners. Requirements: • 5+ years designing complex digital boards — server, datacentre, networking, or comparable high-speed systems • Proven ownership of schematic capture on multi-layer boards carrying high-speed interfaces, from concept to production • Strong grasp of digital and mixed-signal design: power trees, sequencing, clocking, reset, level shifting, interface standards • Comfortable with an EDA suite — Cadence Allegro/OrCAD, Altium, Mentor Xpedition or equivalent • Able to define layout constraints and review layout critically, not just hand it off • Experience carrying a design through multiple revisions and ECOs on the back of test and field feedback Nice to Have: • Boards carrying PCIe Gen5/Gen6, DDR5/LPDDR, or high-speed SerDes interfaces • High-current power delivery design and PDN-aware layout work • NPI experience with CM or ODM partners, including DFM, DFT and yield feedback • Familiarity with OCP rack-scale platforms and their board form factors • Python scripting for BOM handling, netlist checks and design automation 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.