Who we are

At Praxa Sense, we’re 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 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 – determining how the sensor measures, synchronizes, filters, and communicates.

What you will do

• Develop and maintain embedded firmware in C++ for ARM32-based microcontrollers.
• Build scalable CMake project structures and manage codebases via GitHub.
• 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.
• Comfortable with agile development, Git workflows, and CI/CD environments.
• Bonus: experience with RTOS, FreeRTOS, or bare-metal low-power systems.
• Thrives in lean, agile environments – enjoys wearing multiple hats and taking ownership.
• Believes in synergy: great products emerge when experts in different domains collaborate closely.

What we offer

• Salary matching your experience with potential equity participation.
• A pivotal role in building the firmware foundation of a deep-tech biosensing product.
• Direct collaboration with experts in optics, signal processing, and data science.
• The chance to shape how world-leading companies evaluate and integrate our technology.
• Hybrid work culture: in-person collaboration in Delft at least 2 days/week.
• The satisfaction of building technology that directly improves health monitoring.

To apply: Send your CV and motivation to hr@praxasense.com.
Submissions without a motivational letter will result in automatic rejection.