Hire the Best Hardware Prototyping Specialists in San Diego, CA

I am a senior electronics and embedded systems engineer with 47 years of experience in hardware design, firmware development, PCB layout, debugging, testing, and product development. I help clients turn electronic product ideas, prototypes, and hand-wired circuits into working embedded systems and manufacturable PCB designs. Typical projects I can help with include: * ESP32 and STM32 / STMicroelectronics MCU-based products * Power conversion and low-power battery-powered product design * Custom wireless and RF communications, including LoRa and ESP-NOW peer-to-peer networking * Circuit design and component selection for manufacturing * Schematic entry and multi-layer PCB design. * Ordering fabs and coordinating assembled boards. * C/C++ firmware for sensors, displays, audio, wireless, and control systems * Embedded graphics and touchscreen user interfaces using LVGL * Digital audio filtering, FFT spectrum analysis, and voice activity detection * Cloud API integration for speech-to-text, text-to-speech, and language translation * Embedded bus and peripheral interfaces: I2C, SPI, I2S, UART, RS-485, CAN, and SD/MMC * Prototype debugging and board bring-up * Converting breadboard prototypes into clean PCB designs * Design reviews before manufacturing * Analog and digital circuit troubleshooting * Production-oriented improvements for reliability and manufacturability I have founded and managed engineering companies and consulting firms, led technical teams, and helped bring electronic products from initial concept through prototype, testing, manufacturing, and production. For clients, this means fewer design mistakes, faster debugging, lower development risk, and a clearer path from concept to a working, manufacturable product.

With over a decade of experience in the tech industry, both in South Korea and Silicon Valley, I’ve established a reputation for overcoming technical challenges with innovative solutions. My passion for engineering, ignited before high school, drives me to excel in both professional and personal projects. I specialize in hardware and software design, particularly in wearable and portable bio-signal instrumentation, including Brain-Imaging devices utilizing fNIRS, EEG, and Ultrasound for medical and research purposes. What I Can Offer: Project Management & Research: - Expertise in high-level project management and research with a strong foundation in hardware and firmware integration for efficient project execution. - Successfully managed and completed projects for various clients, ensuring timely delivery and high-quality results. Hardware Design: - Proficient in circuit design, component selection, electrical schematics, and PCB layout using Altium Designer. - Deliverables include comprehensive manufacturing files (Gerber files, NC drill, pick and place, assembly diagrams, 3D prints, 3D STEP models, and electrical schematics). - Experienced in analog and digital design, RF, high-speed design, and microcontrollers. - Knowledgeable in various technologies and protocols: SPI, I2C, UART, USB, CAN, RS-485, Ethernet, Bluetooth, WiFi, etc. - Designed hardware for over 20 successful projects, many of which are currently being sold in the market. - Developed wearable and portable bio-signal instrumentation for brain-imaging devices, contributing to advancements in medical and research fields. Prototyping: - Cost-effective prototype manufacturing through established relationships with manufacturers in China, Europe, and the US. - Equipped with extensive tools: multimeters, oscilloscopes, logic analyzers, vector network analyzers, USB protocol analyzers, power supplies, digital electronic loads, and soldering equipment. - Produced high-quality prototypes for clients, leading to successful product launches. Firmware Development: - Over 10 years of coding experience in C/C++ and extensive firmware development. - Proficient in ARM Cortex microcontrollers (STM32, Nordic, Ambiq Apollo), ESP32, Raspberry Pi, Arduino ARM, TI, NXP, Atmel, PIC, FPGA firmware (VHDL, Verilog), and production-quality firmware delivery. - Specialized in ST and Nordic microcontrollers for efficient and quick firmware development. - Developed firmware for a wide range of applications, including medical devices, consumer electronics, and industrial automation. AI/Machine Learning: - Expertise in computer vision and machine learning project architecture/design (Tensorflow, Keras, PyTorch). - Skilled in embedded image processing solutions (Jetson Orin, Raspberry Pi, Intel Movidius, OpenVINO). - Capable of training models for specific purposes, managing dataset collection/preparation, and deploying applications on GCP (Google Cloud Platform) with NVIDIA GPU experience. - Developed and deployed machine learning models for object detection, shape recognition, and action recognition, enhancing product functionality and user experience. Software Development: - Competent in developing software tools for debugging, testing, and manufacturing across Linux/Windows/Mac platforms. - Created user-friendly GUIs and tools to streamline development and testing processes. Wireless Technologies: - Proficient in Bluetooth and BLE-enabled devices, 2.4GHz radio transmitters, and custom analog and digital radio systems. - Developed wireless communication systems for various applications, ensuring reliable and efficient data transmission. Manufacturing Services: - Offering contract manufacturing services to deliver finished products ready for market, ensuring high quality and reliability. - Collaborated with manufacturers to optimize production processes and reduce costs. Professional Integrity: - My rates reflect my extensive experience and knowledge, and I only bill for meaningful project advancement, ensuring transparency and value for my clients. - Committed to delivering high-quality results and providing ongoing support to clients after project completion.

I'm an engineer experienced in designing, testing, and manufacturing IoT Hardware for small and medium-sized businesses. Whether you're in the ideation phase, or ready to scale up production, I'm confident I can help. - Extensive experience with various phases of hardware development, from circuit design and component analysis to DFM optimization and product evaluation. -Specialization in Flex PCB, Multi-Layered and High-Density PCB for IoT applications - Transparent project management from start to finish.

As a dedicated freelance electrical engineer, I specialize in high-density PCB design and radio frequency (RF) technology, bringing reliable and efficient solutions to each project. Experienced in utilizing both Altium and KiCad for intricate design layouts, I also harness my skills in embedded programming to develop complex and responsive electronic systems. With a strong educational background and practical proficiency, I strive to consistently produce quality work and provide innovative solutions in the field of electrical engineering.