Senior Electronics Engineer (Signal Integrity & Instrumentation) One of our leading European clients is looking for a Senior Electronics Engineer to join their team in sunny Barcelona.

This business is building full-stack superconducting quantum computers, from QPUs and cryogenic infrastructure to control electronics, racks, cabling, instrumentation and deployment software.

The team is currently missing a seasoned electronics engineer who designs the signal chain right before it reaches the bench; someone who simulates signal integrity before a board is fabricated. This person woule design grounding instead of guessing it, anticipating the scaling problem, and raising the technical floor of the whole team.

Ultimately, you will become the technical authority for the electronics layer.

Responsibilities:

Signal chain architecture – Define and document how signals are generated, conditioned, filtered,



routed and shielded from the electronics rack to the QPU, both the DC / flux-bias path (DC to a few hundred MHz) and the RF / readout path (a few GHz)

Grounding and shielding by design

Filtering and low-noise design

PCB design review

Instrument integration & validation

Experience:

8+ years of hands-on analog / mixed-signal and/or high-speed electronics design

Low-noise and signal-integrity design from first principles

Grounding and shielding architecture

Filter design from specification

PCB design-review depth

Superconducting quantum, cryogenic or low-temperature measurement experience

Low-noise DC biasing, microwave engineering, attenuators, filtering, twisted-pair / coaxial signal delivery, cryogenic cabling

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📌 Senior Electronics Engineer (Madrid)
🏢 Darwin Recruitment
📍 Madrid