Semidynamics is a Barcelona-based semiconductor company, founded in 2016, that designs European processor technology built on the open RISC-V standard. We develop fully customisable 64-bit RISC-V processor IP, including out-of-order and in-order CPU cores and dedicated vector and tensor units, for demanding AI, machine learning and high-performance computing workloads.

Our team combines deep architecture expertise with hands-on silicon experience, and we are growing to deliver complete, high-performance SoC solutions to our customers.

Role overview

We are looking for an SoC Top RTL Integration Engineer to integrate multiple subsystems into the top level of our high-performance SoCs. You will connect CPU clusters, IP blocks and peripherals through interconnects and NoCs, and make sure the integrated design is clean, constrained and ready for tape-out.

This is a senior, hands-on role for an engineer who has already integrated large SoCs and taken them to silicon.

Key responsibilities

- Integrate multiple subsystems (CPU clusters, memory, accelerators, peripherals and third-party IP) into the SoC top-level RTL.
- Connect subsystems through interconnects and NoCs using protocols such as AXI, APB and CHI.
- Define and integrate the chip's IOs, including connections to pads.
- Write and maintain SDC timing constraints for the integrated design, working with physical design teams.
- Run, debug and close lint, CDC and RDC checks at SoC top level.
- Integrate the top-level clock, reset and power infrastructure, and contribute to UPF power intent.




- Develop Python and C scripts and tests to automate integration flows and support bring-up.
- Work closely with architecture, verification, DFT and physical design teams to drive the SoC through to tape-out.

Required qualifications

- Degree in Electrical Engineering, Electronic Engineering, Computer Engineering or a related field.
- 8+ years of experience in digital/SoC design.
- Strong hands-on RTL design experience (SystemVerilog/Verilog).
- Proven experience integrating multiple subsystems on large SoCs.
- Experience connecting subsystems through interconnects and/or NoCs, with solid knowledge of AXI and APB.
- Proven track record on one or more tape-outs.
- Hands-on experience with lint, CDC and RDC checks.
- Experience writing and managing SDC constraints and integrating chip IOs.
- Working knowledge of Python and C for scripting and automation (user level).
- Fluent English, written and spoken.

Nice to have

- Knowledge of clock, reset and power architectures.
- Experience with the CHI coherent interconnect protocol.
- Experience with UPF-based low-power design flows and pad ring integration.

Why Semidynamics

- Work at one of Europe's most promising deep-tech semiconductor scale-ups
- Accelerated development path, with room to grow into confidential computing, memory isolation and software security
- 4 days per week in the Barcelona office (city center), 1 day working from home
- 1 week of work from anywhere in the world
- Competitive package
- A collaborative, technical, growth-oriented environment that values direct ownership and clear thinking

📌 SoC Top RTL Integration Engineer (Barcelona)
🏢 Semidynamics
📍 Barcelona