Embedded Firmware Engineer

Who we are

At Praxa Sense, we are redefining non-invasive health monitoring with our optical innovation ALIS® – a speckle-based biosensor enabling new frontiers in remote vital sign tracking.

We’re looking for an Embedded Firmware Engineer – Precision Biosensing Platform who thrives at the intersection of hardware and code: crafting the logic that turns precision optics and electronics into accurate, reliable data streams. You’ll design and implement embedded systems software for our ARM-based sensing platform, ensuring that every photon and every signal is handled efficiently and intelligently.

Your firmware will be the heartbeat of ALIS®, which means determining how the sensor measures, synchronizes, filters, and communicates.

What you will do

• Develop and maintain embedded firmware in C++ for ARM32-based microcontrollers.
• Design and implement modular drivers, data acquisition routines, and real-time control loops.
• Integrate and optimize communication protocols (e.g. UART, SPI, BLE, USB) for robust data exchange.
• Collaborate closely with signal processing and data science engineers to align timing, synchronization, and calibration logic.
• Implement unit and integration tests using GoogleTest (GTest) or similar frameworks.
• Contribute to continuous integration pipelines for automated build and regression testing.
• Optimize for power, memory, and timing constraints without sacrificing maintainability.

What we are looking for

• 3+ years of experience in embedded firmware development for real-time systems.
• MSc degree in Electrical Engineering, Embedded Systems, Computer Engineering, or equivalent.
• Expert-level C/C++ with modern coding practices, including templates and object-oriented design.
• Familiarity with ARM Cortex-M architecture and peripheral programming.
• Experience with debugging tools (e.g. J-Link, logic analyzers, oscilloscopes) and profiling firmware performance.
• Understanding of hardware/software integration, timing analysis, and interrupt-driven design.
• Familiarity with electronics.
• Experience with agile development, Git workflows, and CI/CD environments.
• Someone who thrives in a lean, agile environment, enjoys wearing multiple hats and takes ownership.

Additional skills we would be happy to hear about

These are not requirements for the position, but if you have any knowledge of the following subjects, we would love to hear about it.

• Cross-platform desktop application development (C++/Qt).
• Electronics design experience.
• FPGA programming experience (Verilog/VHDL).
• Digital signal processing.

What we offer

• Salary matching your experience with potential equity participation.
• 25 holiday days per year.
• Additional special leave days for big life events such as weddings, moving houses and funerals.
• 7% of your salary as a contribution to life annuity.
• Free office lunch on Fridays.
• Fun company outings, but no unnecessary obligations.
• If you live more than 5km from the office: travel cost reimbursement of €0,23 per kilometer, also (or especially) when you come by bike.
• Work-from-home reimbursement so you can also drink quality coffee at home.
• Hybrid work culture: in-person collaboration at the Groot Handelsgebouw in Rotterdam at least 3 days/week, work from home when you need to focus (or do some laundry).
• Direct collaboration with experts in optics, signal processing and biomedical engineering, and very friendly and ambitious colleagues.
• The satisfaction of contributing to technology that directly improves health monitoring.