We are looking for a highly skilled and innovative Electronics Design Engineer to join our client's team in the cutting-edge quantum key distribution (QKD) systems sector. In this role, you will contribute to delivering low-noise, high-frequency mixed-signal control and instrumentation by designing, prototyping, and validating hardware components, developing firmware, and supporting manufacturing processes.

Responsibilities

Design, prototype, and validate hardware, focusing on low-noise, high-frequency performance.
Develop and modify STM32 F4/H7 firmware in C, interfacing with Python for control and data acquisition.
Build and extend automated test setups to ensure repeatable firmware and board validation.
Support manufacturing by producing packages, maintaining test fixtures, and managing versioning.

Requirements

5 years of experience in analog/mixed-signal electronics design for R&D/instrumentation.
Strong proficiency in Altium for schematics and PCB layout; DFM/DFT.
Deep understanding of analog fundamentals, including low-noise signal chains and precision measurements.
Lab expertise in precision and high-frequency measurements.
Python proficiency for lab/test automation and instrument control; Git-centric workflow.
Proficiency in written and spoken English.
Ability to work on-site in Munich or Potsdam offices when required.
Must have the right to work in Germany and be eligible for security clearance.

Preferred Qualifications

Exposure to STM32 F4/H7; C with HAL.
Familiarity with STM32 bootloaders/updates (DFU/OTA).
Experience with calibration flows and production test fixtures.

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