Hardware and Embedded Engineer

About the role: Lumius is building fast, smart, accessible 3D ultrasound systems that make real-time volumetric imaging more practical and intuitive. As a Hardware & Embedded Engineer, you will own the electronics behind our compact, battery-powered, wireless ultrasound acquisition platform: the high-voltage transmit path, analog receive chain, embedded acquisition firmware, board design, wireless link, and the host-side data stream. You should be excited to take the full signal path from a blank schematic to a working wearable prototype, then debug it at every layer. What you'll work on: · Design the transmit front end, including a high-voltage pulser and transmit/receive switching that protects the receive path. · Build the receive front end, including variable-gain amplification, anti-alias filtering, and high-speed ADC integration. · Bring up low-power MCU systems and, where useful, small FPGA blocks for transmit timing, gain control, sampling, buffering, and synchronization. · Write embedded C/C++ firmware for timing-critical acquisition, peripheral bring-up, ADC interfacing, power states, and BLE/Wi-Fi communication. · Design compact multilayer wearable PCBs that keep high-voltage, analog, RF, and digital domains cleanly separated. · Optimize battery operation through efficient regulation, duty-cycling, throughput management, and careful latency/power tradeoffs. · Build and test the wireless and host-side data path that streams ultrasound data reliably from device to application. · Debug across the full hardware loop: schematic, layout, firmware, measurement, signal integrity, power, and prototype iteration. Who we're looking for: · BS or MS in Electrical Engineering or a related field, or equivalent hands-on experience. · 3+ years building real hardware, with exceptional new graduates considered when they have strong project, startup, or research work. · Depth in at least one of RF/analog hardware, embedded firmware, or PCB design, with the desire to grow across the full system. · Hands-on mixed-signal PCB design experience in Altium or similar tools, including grounding, return paths, and high-voltage/analog isolation. · Strong embedded C/C++ on microcontrollers, including peripheral bring-up, timing-critical control, ADC interfacing, and BLE or Wi-Fi stacks. · Comfort moving quickly from design to bench validation, using oscilloscopes, logic analyzers, spectrum tools, and practical measurement to find the truth. · A high-ownership builder mindset: you can make progress in ambiguity, communicate clearly, and iterate without waiting for hand-offs. Good to have: · Experience with ultrasound systems, piezoelectric transducers, medical devices, or other regulated hardware. · High-voltage or high-speed analog and mixed-signal design experience. · Low-power, battery-powered system design with power management and duty-cycling. · Ultrasound signal processing experience, such as envelope detection, A-mode, or M-mode. · Prior experience at an early-stage startup or in a small, high-ownership engineering team. Why join Lumius: · Work on the core hardware for a new 3D ultrasound platform at the moment when the architecture is still being shaped. · Own an unusually broad technical surface area across electronics, firmware, power, wireless, and signal acquisition. · Collaborate closely with a small founder-led team with deep ultrasound and biomedical engineering expertise. · Help turn a working medical-device prototype into a compact, reliable platform that can support real clinical workflows. Pay: $80,000.00 - $110,000.00 per year Benefits: Health insurance Stock options Work Location: In person