Hardware Electrical Engineer - Vietnam

Title: Hardware Electrical Engineer (PEMF/VNS)  Location: Vietnam (Hanoi or Ho Chi Minh City) Employment: Full-time Role overview We are building a closed-loop neurostimulation alpha prototype integrating EEG-driven control with peripheral stimulation modalities (PEMF and tVNS). You will lead the hardware design and bring-up of the stimulation drivers, ensuring safety, reliability, and integration with our software control loop. Key responsibilities - Design and bench-validate a high-current PEMF driver capable of pulsed magnetic field generation (frequency, duty cycle, rise/fall characteristics per spec). - Design and bench-validate a current-controlled tVNS output stage with compliance voltage, current limits, and isolation per safety best practices. - Select components (MOSFETs, gate drivers, coils, PSU, current sense, isolation, protection) and prepare BoM with alternates and lead-time mitigation. - Develop Rev A control PCB (PEMF + VNS) from schematic to layout, DFM checks, and release for fab/assembly. - Implement safety measures: HW interlocks, emergency stop, fusing, TVS/ESD, overcurrent/overvoltage protection; collaborate with SW for software limits. - Bring-up and debugging: oscilloscope measurements, load emulation, thermal/EMI considerations, iterative tuning with SW to meet latency targets. - Documentation: schematics, layout notes, test plans, bench reports, and design rationale. - Collaborate across time zones with SW, PM, and manufacturing on schedule and risk mitigation. Minimum qualifications - B.S. or higher in Electrical/Electronics Engineering (or equivalent experience). - 5+ years in power electronics/analog design, including pulsed power or motor/solenoid/coil driving. - Hands-on experience with high-current MOSFET stages (50–200 V class), gate drivers, snubbers, and layout for fast edges. - Experience designing precision current sources (e.g., Howland/modified current pump) and bi-phasic/mono-phasic stimulation paths. - Comfort with isolation techniques (isolated DC-DC, digital isolators), patient leakage and basic medical safety practices. - Proficient with schematic/layout tools (e.g., Altium, KiCad) and lab equipment (oscilloscope, function generator, e-loads). - Strong documentation and communication skills. Preferred qualifications - Experience with neuro/biomedical stimulation systems (TENS/tVNS, FES, implantable/external stimulators) or EMC for medical devices. - Familiarity with EEG systems and noise mitigation during stimulation. - Vendor/supplier engagement in APAC; building BoMs with alternates and lifecycle awareness. What success looks like (first 90 days) - Week 2–3: Component shortlist and initial BoM with alternates and lead times. - Week 4–6: PEMF and tVNS breadboard prototypes validated on bench with dummy loads and safety checks. - Week 6–8: Rev A PCB design complete and sent for fab/assembly. - Week 9–12: Integrated alpha prototype dry run, with documented test data and iteration plan. How to apply Please send CV and a short note about your relevant PEMF/VNS or pulsed power experienceto Ms Huyen at huyennguyen@emotiv.com