Semidynamics is building a new generation of high-performance computing products for AI based onRISC-V. The company designs custom, scalable silicon for compute-intensive applications, wheresoftware, architecture, modelling, and hardware validation meet. The work sits close to the product's technical foundations. Engineers are exposed to real architectural trade-offs, performance limits, and silicon-facing decisions earlier and more directlythan in most roles.This is demanding engineering work with a direct path into the silicon that will run the nextgeneration of HPC/AI computing. The Performance Modelling Engineer contributes directly to the work that shapesSemidynamics' products. The role carries responsibility for its assigned scope, the technicaldecisions made within that scope, and the quality of the results delivered. The engineer works in a multidisciplinary team where hardware, software, and AI specialists work side by side. Decisions are expected to follow the strongest technical argument, supported bycollaboration, direct feedback, and shared credit.



Semidynamics typically looks for around 2-5 years of relevant experience for this level. This range isa guide rather than a strict cutoff: what matters most is the depth of skill demonstrated in the technical interview. At this level, the engineer is responsible for the performance analysis and modelling of individual components from start to finish, from instrumenting simulators to signing off on the results. The role involves limited day-to-day supervision: choosing the approach for a component, validating the result, and raising issues early with a proposed path forward. This is where the technical foundation is built: simulator instrumentation, workload analysis, cycle-accurate modelling, and the ability to connect software behaviour with hardware events.
Why Semidynamics?
- Work at one of Europe’s most promising deep-tech semiconductor start up - from silicon to systems - Semidynamics.
- Accelerated deve

📌 Performance Modelling Engineer (Barcelona)
🏢 Semidynamics
📍 Barcelona