Jobs at Tacit

Design, fabricate, assemble, and test mechanical, electrical, and sensor prototypes for wearable devices. Create PCBs, wiring, fixtures, jigs, and tooling; troubleshoot electromechanical systems; integrate sensors and RF components; and provide DFM/DFA feedback. Collaborate across engineering, research, design, validation, and manufacturing teams while documenting builds and transitioning prototypes into repeatable, production-ready processes.

Build polished, user-facing interfaces for novel human-computer interaction workflows using React and TypeScript. Translate product concepts and designs into intuitive UX flows, prototype and test experiences, improve onboarding and session journeys, analyze user behavior, and establish frontend patterns and component systems. The role emphasizes accessibility, performance, responsiveness, motion, visual quality, and close collaboration across design and engineering.

Own day-to-day finance and operations for an early-stage hardware startup: manage spend controls and Ramp, ensure accounting accuracy and reconciliations, maintain cap table in Pulley, own monthly forecasts and department budgets, negotiate vendor contracts and insurance, support board/investor questions, and lead cross-functional strategic modeling and diligence tasks.

Lead hardware scaling from late-stage engineering into high-volume manufacturing. Own NPI builds (EVT/DVT/PVT), factory readiness, SOPs, test station deployment, supplier management, BOM cost modeling, and yield/cycle-time optimization across global CMs to ensure on-time, low-defect ramps and predictable unit economics.

Hands-on RF hardware internship focused on characterizing RF signal chains and bringing up transceiver evaluation hardware. Work includes prototyping circuits, designing PCBs and test fixtures, using lab instruments (VNA, spectrum analyzer, signal generator), developing automated test setups with Python and embedded C/C++, analyzing measurement data, and producing validation procedures and engineering recommendations. Interns own focused projects and collaborate with RF and validation engineers onsite in San Francisco.

Lead architecture, development, and productionization of embedded firmware for battery-powered wearable neurotech/audio devices. Own realtime data acquisition, connectivity, power management, bootloaders, OTA, debugging, validation, manufacturing test systems, and reliability practices while collaborating cross-functionally to optimize performance and power.

Design, implement, and optimize embedded firmware and NPU/DSP runtimes for on-device ML. Build realtime sensor-to-inference pipelines, optimize latency, memory, and power, debug hardware/firmware interactions, and collaborate with ML, electrical, and product teams to deliver production-grade edge intelligence.

Lead architecture and transistor-level design for ultra-low-power, frequency-agile CMOS RF sensing. Define RF front-end, synthesizer, and power-management approaches; stand up RFIC design flows; simulate and design critical blocks; manage tape-out, bring-up, and external partners; and build the internal silicon team and IP strategy.

Develop and optimize deep learning models to decode multimodal biosignals from custom sensors for real-time inference on edge hardware. Build neural architectures, fusion techniques, evaluation frameworks, and collaborate with hardware engineers and neuroscientists to deploy and benchmark models across users and datasets.

Lead architecture, design, and production of mixed-signal neurotech consumer hardware. Own schematic and PCB design, power systems, high-speed interfaces, board bring-up, validation, and manufacturing ramp (EVT/DVT/PVT), collaborating with mechanical, firmware, and software teams to optimize performance, thermal behavior, and reliability.

PhD-level internship to design, simulate, prototype, and test antenna systems. Duties include EM simulations, PCB layout support, measurement with RF test equipment, prototype integration, on-body characterization, and documentation to support product development and manufacturability.