Ram P.

I design and build medical wearables and consumer smart devices end-to-end — hardware, firmware, PCB design, sensors, and on-device AI, from prototype to production. ⭐ 100% Upwork Job Success ⏳ 10+ years building hardware 📦 50+ devices shipped 🏭 Prototype → mass production 🛠️ End-to-end product development I take projects from schematic to tested production units under one roof — with in-house SMT, prototyping, and pilot assembly up to ~500 devices. No months lost lining up a contract manufacturer before you have working hardware in hand. ━━━━━━━━━━━━━━━━━━━━━━━ 🩺 MEDICAL & HEALTH WEARABLES ━━━━━━━━━━━━━━━━━━━━━━━ Devices I build: - Health & vitals wearables — heart rate / HRV, SpO₂ / pulse oximetry, ECG, respiration, skin temperature - Smart rings, bands & skin patches for continuous monitoring - Remote patient-monitoring (RPM) & connected-health devices - Pulse oximeters, ECG monitors, fitness & recovery straps - Neurostim & biosignal devices — TENS/EMS, EDA/GSR Standards-aware: IEC 60601, IEC 62304, ISO 13485, FDA 510(k) / CE. (I flag standards; I'm an engineer, not a regulatory consultant.) ━━━━━━━━━━━━━━━━━━━━━━━ ⌚ CONSUMER SMART DEVICES ━━━━━━━━━━━━━━━━━━━━━━━ Devices I build: - AI wearables & voice pendants — note-taking, voice capture, AI assistants - Smart glasses — firmware/SDK, audio & sensor integration (not optics) - Hearables & audio devices - Smartwatches, fitness & wellness wearables - Smart-home & Matter/Thread connected devices - Asset, pet & personal trackers — BLE, GPS, LoRa, UWB; Apple Find My + Nearby Interaction, Google Find Hub (Find My Device), Fast Pair ━━━━━━━━━━━━━━━━━━━━━━━ 🤖 ON-DEVICE & EDGE AI ━━━━━━━━━━━━━━━━━━━━━━━ The differentiator most teams are looking for now: - On-device inference for health signals — arrhythmia/AFib screening, fall detection, activity & sleep classification - ML-based motion-artifact rejection & signal-quality gating for wearable-grade PPG/ECG - TinyML on MCU & edge silicon — privacy-first, low-latency, no cloud dependency - AI companion-app + device integration ━━━━━━━━━━━━━━━━━━━━━━━ 🔧 TECH STACK — FULL ━━━━━━━━━━━━━━━━━━━━━━━ 🖥️ Compute & Logic MCUs — Nordic nRF52/53/54L, STM32, NXP, TI, ESP32; ARM Cortex-M, RISC-V. App processors / SoMs — i.MX, Jetson. FPGA — Lattice iCE40 / CrossLink-NX, AMD/Xilinx. 🫀 Sensors & Biosignals PPG/ECG/bio AFEs — MAX86174A, MAX30001, MAX86141, ADS1220/1292. IMUs (ST/Bosch), temperature, optical, environmental. Mic arrays & audio front-ends. 👓 Display, Vision & Audio MIPI CSI/DSI, micro-OLED / microLED display drivers, camera + FPGA video pipelines Audio codecs, beamforming, bone conduction — hearables & voice wearables. 💾 Firmware & OS Bare-metal, Zephyr, FreeRTOS, ThreadX; Embedded Linux (Yocto/Buildroot) for camera/AI-class devices. Secure boot & OTA, ultra-low-power firmware. 🤖 Edge AI TinyML, TensorFlow Lite Micro, ONNX, Edge Impulse; NPU/accelerator targets, Jetson, Coral/EdgeTPU. 📡 Connectivity BLE (+Mesh, direction finding), Wi-Fi, LoRa, Cellular (LTE-M/NB-IoT/Cat-1), UWB, Thread, Matter, NFC, GNSS. 📐 Hardware & PCB Schematic + multilayer, HDI, high-speed & RF, rigid-flex / flex. Altium, KiCad. DFM/DFT. 🔋 Power BMS, PMIC, Qi/AirFuel wireless charging, fuel gauging, energy harvesting, ultra-low-power design. 🛠️ Mechanical & Industrial Design Enclosure & wearable form-factor design, 3D printing, injection molding, FEA, DFM. SolidWorks, Fusion 360. ☁️ Cloud & App AWS IoT, Azure, MQTT; companion apps — Flutter, React Native, Swift, Kotlin. ✅ Compliance & Manufacturing IEC 60601, IEC 62304, ISO 13485, FDA 510(k) / CE, FCC, RoHS, REACH. BOM, DFM/DFA, QC, in-house SMT + pilot assembly to ~500 units. ━━━━━━━━━━━━━━━━━━━━━━━ 🚀 WHY ME ━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ One source, every stage — feasibility through QC and pilot production. No vendor handoffs, no integration gaps to manage yourself. 🏭 In-house SMT + pilot assembly to ~500 units — design and build under one roof, no multi-month wait on a contract manufacturer. 🎯 Sensor hardware + on-device AI in one place — rare; most do one or the other. 🩺 Low-risk for medical — regulatory-aware workflow, 100% job success, repeat clients. Send me the problem and your constraints — target cost, volume, certifications, timeline — and you'll get a straight technical read on feasibility before any commitment.