Hire the Best Electronic Engineers
in Spain

Most freelancers on Upwork will send you a folder with design files and let you figure out how to build it. I don't work like that. I am a Senior Hardware Engineer with a dual background in Electronics and Mechanical Design. I run my own lab in Spain equipped for complex engineering projects, using mixed-signal oscilloscopes, JTAG debuggers, and SMD rework stations, not just basic soldering irons. I come from the Aerospace and Medical (IEC 60601) sectors. I use those strict standards to catch signal integrity issues or mechanical misalignments early, so you don't waste thousands on a bad manufacturing run. My goal is to ship you a working prototype. I don't just design the circuit; I design the enclosure for it at the same time. I assemble the high-density PCB, build the custom case, and put everything together on my bench. This means when you receive the prototype, you can simply turn it on and verify it works. How I work: 1. Physical results: I don't stop at the schematic. I source components, assemble the board, build the enclosure, and test the full assembly. 2. Integrated Design: I design the PCB (Altium/KiCad) and the Mechanical Enclosure (CAD) together. 3. Verification: I use my lab equipment to check thermal stability and electrical performance before I ship the prototype. My Expertise: 1. Electronics: High-Complexity PCB Design (HDI, Rigid-Flex), FPGAs (Xilinx), and Firmware (STM32/ESP32). 2. Mechanical: Enclosure Design, 3D Printing, Thermal Management. 3. Prototyping: I handle the entire build process in my lab and send you a unit ready to test. If you want a finished prototype and not just a zip file, let's talk.

I am an Electronics Engineer with solid experience in the design, development, and prototyping of embedded systems and custom PCBs. I specialize in microcontroller-based solutions using ESP32, STM32, and STM8 architectures, as well as Arduino-based platforms when appropriate. My work spans across industrial automation, automotive electronics, and custom hardware design, including motor control, sensor integration, serial communications, and AC/DC power conversion (e.g., VIPER12ADIP-based designs). I am proficient in developing graphical user interfaces using LVGL and Nextion displays, and have implemented complete systems combining hardware and software with a focus on reliability, scalability, and documentation. I also have hands-on experience in electrical safety testing for industrial panels, as well as integration of EtherCAT-based automation components. I bring a detail-oriented, engineering-driven approach to every project I undertake.

I help companies transform embedded product ideas into reliable, production-ready devices. I'm a Principal Embedded Software Engineer with 20+ years of experience developing commercial embedded systems from concept through manufacturing. I work across the entire product lifecycle—from system architecture and firmware development to hardware bring-up, production testing, and manufacturing support. My background combines deep low-level firmware expertise with practical product development. Earlier in my career, I spent more than 10 years developing RTOS components, networking stacks, USB stacks, bootloaders, device drivers, and low-level embedded software. This foundation allows me to quickly understand complex systems, identify root causes, and design robust solutions. I don't just write firmware—I help build complete embedded products. Core Expertise Embedded C/C++ System & Firmware Architecture Embedded Linux FreeRTOS Zephyr RTOS Bootloaders OTA Firmware Updates Secure Firmware Architecture Low-Power Design Digital Signal Processing Industrial IoT MCU Platforms STM32 ESP32 Nordic nRF52 / STM32WB NXP Renesas TI MSP430 Microchip PIC / dsPIC ARM Cortex-M / Cortex-A Embedded Linux platforms Wireless & Connectivity Bluetooth Low Energy (BLE) LoRa & LoRaWAN Wi-Fi NFC GSM / GPRS LTE-M / NB-IoT GPS / GNSS Satellite Communications MQTT HTTP / HTTPS TCP/IP Areas I Can Help With Embedded firmware development Product architecture Hardware/Firmware co-design Communication protocol design Bootloader development OTA update systems BLE applications LoRa & LoRaWAN devices NFC & Secure Elements Embedded Linux Production programming Manufacturing test systems Hardware bring-up Performance optimization Power optimization Technical consulting Hardware Experience I regularly work with electrical schematics, hardware debugging, prototype bring-up, and production validation. I also collaborate with PCB designers to move products efficiently from concept to manufacturing. Engineering Tools Besides firmware development, I build engineering tools that simplify development and production: Python desktop applications Manufacturing software Production programming tools BLE diagnostic applications NFC validation tools Firmware update utilities Automated test frameworks Recent Commercial Projects BLE-enabled IoT devices LoRa & LoRaWAN industrial monitoring systems Secure NFC and authentication systems Satellite communication modem Smart beverage dispensing platform Automotive embedded systems Cellular IoT gateways Industrial controllers Secure OTA firmware update systems If you're looking for someone who can take an embedded product from an initial idea to a reliable production-ready solution, I'd be happy to discuss your project.

I'm Miguel, an embedded systems engineer from Spain with more than six years of professional experience, including projects such as navigation systems for the Spanish Navy and satellite platforms for the European Space Agency. Today I work independently with companies, startups and entrepreneurs building new electronic products. → HARDWARE SERVICES • PCB design and schematics in KiCad • Component selection • Design review • Production-ready files for JLCPCB and PCBWay (Gerbers, BOM, CPL) → FIRMWARE SERVICES • Low-level drivers • Communication protocols • RTOS • Complete embedded and IoT applications Experience with STM32, ESP32, Nordic devices and more platforms, BLE, Wi-Fi, GNSS, LoRaWAN, LTE-M, NB-IoT. Check out my portfolio to see my work. → Contact me and let's see how I can help.

Hi, I'm Salvador. I help companies, startups, and inventors transform ideas into manufacturable products. Every design I create is developed with engineering in mind—not just appearance. I focus on functionality, manufacturability, cost optimization, and reliability from the very beginning. With over 6 years of experience, I can support your project from concept to production using SolidWorks, CATIA, Fusion 360, and AutoCAD. Whether you need a 3D model, a complete mechanical assembly, manufacturing drawings, FEA simulations, CNC programming, or realistic product renderings, I can help. My goal is simple: deliver designs that work in the workshop, not only on the screen.

I’m a PCB designer experienced in creating high-performance circuit boards for all type of applications. Whether you need to design a new PCB, optimize an existing one, or ensure your electronic systems meet stringent standards, I can help. Skills: PCB design, layout and fabrication; quality assurance; project management; innovative solutions. Experience: Lead PCB designer for a Formula Student team, specializing in complex automotive systems. Full project management from concept to final implementation.