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# Optoelectronics Hardware Engineer

- **Company:** Praxa Sense
- **Location:** Rotterdam, Netherlands (Remote available)
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Altium Designer, Data Analysis, Firmware, Hardware Design, Python (Programming Language), Rapid Prototyping Process, Application Specific Integrated Circuits, Wearables
- **Published:** October 31, 2026
- **Apply:** https://praxasense.com/vacancy-optoelectronics-hardware-engineer

## About the Role

* MSc in Electrical Engineering, Applied Physics or Optoelectronics.
 * 3 to 7 years of hands-on experience developing optoelectronic hardware, such as optical sensors, laser-based systems or photodetection modules.
 * Proven experience designing PCBs in Altium Designer from schematic to production, including multilayer layout, DFM and working with PCB and assembly suppliers.
 * Solid knowledge of analog and mixed-signal electronics, in particular low-noise front-ends for photodetection and laser/VCSEL drivers.
 * Good understanding of optics and semiconductor light sources, VCSELs in particular.
 * Hands-on lab skills with optical setups and measurement equipment such as oscilloscopes, spectrum analyzers, and optical power meters.
 * Data analysis skills in Python.
 * Strong communication skills: you can discuss integration topics clearly with customer engineers from electronics, mechanical and firmware backgrounds.
 * Willingness to travel occasionally to customers in Europe.
 * Fluent in English; Dutch is a plus., These are not requirements for the position, but if you have any knowledge of the following subjects, we would love to hear about it.
 * Experience with PPG or other wearable sensing modalities (strong plus).
 * Experience with wearables, miniaturization, or battery-powered devices.
 * Experience with bare-die components, chip-on-board or optical packaging.
 * Experience in a customer-facing technical role or in a start-up environment.

## Description

* Design, iterate and test the optoelectronic hardware of the sensor: VCSEL drivers, photodetectors and image sensor interface, analog front-end and power supply.
 * Design PCBs end-to-end in Altium: schematics, multilayer layout, component selection, BOM, design reviews and manufacturing files.
 * Manage prototype builds and small series with PCB and assembly suppliers, and solve issues in production.
 * Optimize the optical configuration, including VCSEL positioning and orientation, source-detector geometry, diffusers, windows and encapsulation materials.
 * Characterize sensor performance in the lab: signal quality, SNR, noise, power consumption and temperature behavior, including VCSEL stability.
 * Own the electrical, optical and mechanical interface between ALIS® and customer host systems: power, grounding, shielding, connectors, layout around the sensor and cover windows.
 * Review customer schematics, layouts and prototypes, and help diagnose integration and signal-quality issues, on site or in our lab.
 * Write hardware integration guidelines, design rules, and reference designs for customers.
 * Work closely with the firmware team on the communication interface and on the roadmap towards SiP or ASIC.