I am an experienced embedded systems engineer with a strong background in hardware development, firmware programming, and IoT solutions. Over the years, I’ve successfully designed and implemented innovative electronics projects, and I’m always eager to take on new challenges to grow my expertise and deliver impactful solutions. Programming Languages: C, C++, Python Hardware Platforms: ESP32/ESP8266, STM32F4, Arduino, Raspberry Pi Software & Tools: KiCad, EasyEDA, Arduino IDE, PlatformIO, STM32CubeIDE, TinkerCad Protocols & Skills: UART, I2C, SPI, MQTT, HTTP/HTTPS, RTOS, BLE I’m passionate about delivering high-quality solutions and helping clients bring their ideas to life through efficient and innovative embedded systems designs.

🎯 𝗪𝗼𝗿𝗸𝗲𝗱 𝘄𝗶𝘁𝗵 Spanish, American and European Companies International 𝘄𝗼𝗿𝗸 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝗼𝗻-𝘁𝗶𝗺𝗲 𝗲𝘃𝗲𝗿𝘆-𝘁𝗶𝗺𝗲 𝗖𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲 𝗽𝗿𝗶𝗰𝗶𝗻𝗴. ✅ 𝟭0 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. 𝗨𝗦 & 𝗘𝘂𝗿 𝘀𝘁𝗮𝗿𝘁𝘂𝗽 𝗰𝗹𝗶𝗲𝗻𝘁 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻. ☑️ <4 𝗵𝗼𝘂𝗿 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝘁𝗶𝗺𝗲𝘀, 𝟳 𝗱𝗮𝘆𝘀 𝗮 𝘄𝗲𝗲𝗸 🛠 2 free revisions 🥋 Professional Electrical and Electronics Engineer I am an Embedded Systems Engineer with 10 years of experience in PCB design and firmware development. I work with a wide range of microcontrollers, with a strong focus on ESP32 and ESP-IDF IoT firmware development Framework. I design high-quality multilayer PCBs following signal integrity, EMI/EMC and Electrical Engineering best practices delivering reliable, production-ready boards and firmware. My expertise include: ⚡Schematics Design ⚡PCB Design ⚡Firmware Development ⚡C/C++ ⚡ESP32 PCB Design Deliverables ✔Gerber files ✔NC Drill files ✔BOM ✔Pick and Place files ✔Any other file a client may need Why choose me: - Vast experience -Robust designs. -Proven reliability (24/7 availability). -Seamless communication with constant updates. It's my pleasure to work on your project. Just drop me a message here at Upwork to discuss further. Regards, Anthony.

I help startups and companies transform ideas into production-ready electronics products. With experience spanning 𝟰𝟬+ 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗮𝗰𝗿𝗼𝘀𝘀 𝟮𝟱+ 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀, I specialize in 𝗲𝗻𝗱-𝘁𝗼-𝗲𝗻𝗱 𝗲𝗹𝗲𝗰𝘁𝗿𝗼𝗻𝗶𝗰𝘀 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 — from architecture and prototyping to manufacturing handoff. I operate a 𝗱𝗲𝗱𝗶𝗰𝗮𝘁𝗲𝗱 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗹𝗮𝗯 for rapid prototyping, bring-up, testing, debugging, and validation, enabling faster iterations and reduced development risk. Experience spans 𝗖𝗼𝗻𝘀𝘂𝗺𝗲𝗿 𝗘𝗹𝗲𝗰𝘁𝗿𝗼𝗻𝗶𝗰𝘀, 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗮𝗹 𝗜𝗼𝗧, 𝗔𝘂𝘁𝗼𝗺𝗼𝘁𝗶𝘃𝗲, 𝗠𝗲𝗱𝗶𝗰𝗮𝗹 𝗗𝗲𝘃𝗶𝗰𝗲𝘀, 𝗗𝗲𝗳𝗲𝗻𝗰𝗲 𝗦𝘆𝘀𝘁𝗲𝗺𝘀, 𝗥𝗼𝗯𝗼𝘁𝗶𝗰𝘀, and 𝗘𝗺𝗯𝗲𝗱𝗱𝗲𝗱 𝗟𝗶𝗻𝘂𝘅 platforms. ━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗕𝘂𝗶𝗹𝗱 ✓ 𝗘𝗹𝗲𝗰𝘁𝗿𝗼𝗻𝗶𝗰𝘀 𝗣𝗿𝗼𝗱𝘂𝗰𝘁 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • Product architecture and feasibility studies • End-to-end hardware development • Design for Manufacturing (DFM) and Design for Testing (DFT) • Prototype development and production handoff • Manufacturing documentation and vendor support ✓ 𝗣𝗖𝗕 𝗗𝗲𝘀𝗶𝗴𝗻 & 𝗛𝗮𝗿𝗱𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 • Compact, manufacturable PCB designs • High-speed, low-power, and battery-powered systems • 1–6 layer rigid and flex PCB designs • Component selection and BOM optimization • EMI-conscious and reliability-focused designs • 3D PCB integration and enclosure collaboration Experience with: • Sensor interfaces • Display systems • Power electronics and battery-powered products • USB, CAN, RS-485, Modbus, UART, SPI, I²C, BLE, Wi-Fi, LTE, GPS, and custom protocols ✓ 𝗘𝗺𝗯𝗲𝗱𝗱𝗲𝗱 𝗙𝗶𝗿𝗺𝘄𝗮𝗿𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 Development experience on: • STM32 • ESP32 • AVR • PIC • ARM Cortex-M platforms • Raspberry Pi • NVIDIA Jetson platforms Software expertise: • Embedded C/C++ • Python • MicroPython • FreeRTOS • Bare-metal development • PlatformIO • Keil • Linux application development Experience includes: • Device drivers • Real-time systems • Sensor fusion • Control algorithms • Data acquisition and processing • Wireless communication stacks ✓ 𝗘𝗺𝗯𝗲𝗱𝗱𝗲𝗱 𝗟𝗶𝗻𝘂𝘅 & 𝗦𝗕𝗖 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 • Custom carrier board development • Embedded Linux platform bring-up • BSP customization • Driver development • Linux application development • Raspberry Pi Compute Modules • NVIDIA Jetson platforms • Rockchip SoMs Recent projects include custom Linux-based multimedia systems, industrial automation platforms, and AI-enabled edge devices. ✓ 𝗜𝗼𝗧 & 𝗖𝗼𝗻𝗻𝗲𝗰𝘁𝗲𝗱 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝘀 • Industrial IoT systems • Edge-to-cloud architectures • BLE, Wi-Fi, LoRa, LTE, Zigbee, and GPS-enabled products • Secure device communication • Data collection and remote monitoring systems ━━━━━━━━━━━━━━━━━━━━━━ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗪𝗼𝗿𝗸 𝘄𝗶𝘁𝗵 𝗠𝗲 ✓ 𝟰𝟬+ 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗱 𝗮𝗰𝗿𝗼𝘀𝘀 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝗶𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 ✓ 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝘀𝘂𝗽𝗽𝗼𝗿𝘁𝗶𝗻𝗴 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝘀 𝗳𝗿𝗼𝗺 𝗰𝗼𝗻𝗰𝗲𝗽𝘁 𝘁𝗼 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 ✓ 𝗗𝗲𝗱𝗶𝗰𝗮𝘁𝗲𝗱 𝗲𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴 𝗹𝗮𝗯 𝗳𝗼𝗿 𝗽𝗿𝗼𝘁𝗼𝘁𝘆𝗽𝗶𝗻𝗴 𝗮𝗻𝗱 𝘃𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻 ✓ 𝗦𝘁𝗿𝗼𝗻𝗴 𝗵𝗮𝗿𝗱𝘄𝗮𝗿𝗲 + 𝗳𝗶𝗿𝗺𝘄𝗮𝗿𝗲 + 𝗟𝗶𝗻𝘂𝘅 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝘂𝗻𝗱𝗲𝗿 𝗼𝗻𝗲 𝗿𝗼𝗼𝗳 ✓ 𝗙𝗼𝗰𝘂𝘀 𝗼𝗻 𝗺𝗮𝗻𝘂𝗳𝗮𝗰𝘁𝘂𝗿𝗮𝗯𝗹𝗲, 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗱𝗲𝘀𝗶𝗴𝗻𝘀 If you're building a new product, optimizing an existing design, or preparing for manufacturing, I'd be happy to discuss how I can help bring your product to market.

Will update a bit after I see where this goes -

I am professional of electronics, focused on designs and medium and low scale production. With more than 25 years of experience i feel each new customer is a new friend, because we offer thrust, because i are on your side: My success is your success. Want to continue being your provider even after 20 years. Our knowledge of all product stages, allow to create projects with following specifications: 1. Low production cost 2. Easy to use 3. Good reliability 4. Long lifetime 5. Easy to manufacture 6. Space/size optimized Constant training allow to offer the best technology available for developments. Including complex design as GPS, WiFi, IOT and portable devices without deprecate simple things such audio amplifier. Skillset: 1. Idea to product on store knowledge 2. Schematic/Circuit design 3. PCB Design single/2/4/6 layers insertion/SMD 4. BOM according best relation of availability, volume, and required technologies 5. Best Production cost. 6. Pre built Case/ 3D / Plastic injection 7. Normalized design process 8. Technical document with used formulas, block components discarded an Services: 1. Free of cost consultation. 2. PCB Prototyping and components Procurement Support 3. Firmware in C, C++, assembler, Android, Perl, PHP 4. Production support if required 4. Project maintenance 5. Customer Satisfaction Techs: 1. Analog / digital / Microcontroled / SOC 2. Sensing: Temperature, humidity, pressure, speed, flow, geolocation, etc. 3. WiFi, Bluetooth, RS232, LIN, Lora, Ethernet, Xbee, Cloud 4. C, Perl, php, Arduino 5. Portable, autonomous, or AC powered. 6. Many techs more.

Top 10% of all talent on Upwork (as per Upwork's Talent program). I help startups, product teams, and hardware innovators turn ideas into reliable, production-ready embedded systems - from schematic and PCB design to low-level firmware and SoC bring-up. On the hardware side, I bring hands-on experience in electronics design and PCB development. I specialize in embedded firmware development close to the hardware, working on ARM-based systems where timing, stability, and deep debugging matter. I’ve developed bare-metal and RTOS-based firmware, written custom peripheral drivers (SPI, UART, Timers, DMA, GPIO), and supported post-silicon bring-up and validation. What I Can Help You With PCB design & electronics engineering – schematics, board bring-up support. Embedded firmware development (C) – bare-metal & RTOS (Zephyr). Peripheral driver development with DMA and concurrency awareness. SoC / MCU bring-up and post-silicon debugging. Hardware debugging using JTAG/SWD, Segger RTT, logic analyzers, protocol traces. Firmware build & debug setup – CMake, ARM toolchains, VS Code / Eclipse. Platforms & Tools KiCAD, Altium, ARM Cortex-M, ARM GCC, VS Code, Eclipse, Code Composer Studio, J-Link, Wireshark, Zephyr RTOS, CMake, Saleae, Git, etc. Why Me? Strong hardware–software co-design mindset. Clear communication and structured problem-solving. Ability to debug complex issues at signal, register, and firmware level. Ownership from concept to bring-up to stabilization.

I am an electronics and firmware developer with experience in PCB design, firmware development, prototyping and SMD assembly. My journey started with hand crafting single sided PCBs — giving me a strong practical foundation from the ground up. PCB Design: 2 and 4 layer PCB design in KiCad 8,Kicad 9(Soon migrating to Kicad 10) & EasyEDA(Standard & Pro version) . Former EagleCAD user Schematic to manufacturing ready layout Custom footprint creation Gerber, drill, pick and place and BOM files Full submission support for JLCPCB(PCB & PCBA) and similar manufacturers Assembly & Prototyping: SMD soldering — 1206-0402 passives, QFN, TSSOP (except BGA) Through hole soldering Small batch prototype assembly Component procurement support Firmware & Connectivity: Microcontrollers — ESP32, ESP8266, Arduino, AVR, 8051 Cellular — Quectel EC25 & SIMCom SIM7672 with MQTT SSL/TLS Wireless — LoRa, WiFi, Bluetooth, GSM GPS — Ublox & Quectel module integration Displays — OLED, TFT, capacitive touch Protocols — I2C, SPI, UART, MQTT SSL/TLS, HTTP REST Motor drivers, WS2812 LED arrays, power circuits GPS- Quectel L89, Ublox M10S Special - WS2812 Led Projects include: GPS trackers, GSM security systems, water level controllers, , line followers, obstacle detection robots, WS2812 LED arrays and various ESP32 and Arduino IoT devices. I am a full time freelancer committed to clear communication and timely delivery — working with hobbyists, startups and commercial clients alike. Feel free to reach out!

Hello, everyone! My name is Sergey, and I have worked in the production of commercial electronics for many years. What I do best: 🛠 Embedded Systems Expertise: ✅ Low-level programming (C/C++), Python ✅ Skilled in real-time systems (FREERTOS) and OTA updates ✅ Expertise in communication protocols: I2C, SPI, UART, RS485, CAN, USB, Ethernet, MODBUS ✅ Expertise in peripheral integration: sensors, displays, motor drivers, EEPROMs ✅ Wireless IoT: WiFi, BLE, LoRa, FSK, 4G modules ✅ Hardware debugging with tools like JTAG, oscilloscopes, and logic analyzers ✅ PCB Design & Layout ✅ Electrical Engineering 🛠 Power Optimization: ✅ Low Power Design: Achieved <15µA sleep current in battery-powered IoT devices 🛠 Tools & Technologies: ✅ IDEs: STM32CubeIDE, VSCode+Platformio, ESP-IDF, Arduino IDE ✅ Platforms: STM32, ESP32, Raspberry Pi ✅ Web/Mobile: Flutter, Node-Red ✅ Version Control: Git, GitHub ✅ Protocols: TCP/IP, MQTT, MODBUS 💬 Let’s discuss how I can accelerate your embedded project

Know about MCU, SoC, ARM, SH, AVR, PIC, ESP, TI CC25xx, TI CC32xx, ESP32, ESP8266, etc. - Prototype Development kit: Arduino UNO R3, PIC16F887, ATmega128, MSP430 Starter kit, STM32F4 Discovery, Raspberry, Beagle Bone, etc. - Software: MS Visual Studio, Altium Designer, u-Vision Keil, Android Studio. - Have experience in programming languages such as C/C++, C#, Java - Have solid knowledge of the standard interface such as I2C, SPI, UART, CAN. - Have experience using debugging tools such as Segger Jlink, CAN bus analyzer (CL3000), Logic analyzer. - IoT devices with wireless connectivity such as LTE, CAT-M1, NB-IoT, LoRa/LoRaWAN, BLE, WIFI, ZigBee, NFC - Good experienced in AWS Service, AWS IoT, AWS Shadow, AWS Jobs. - Good experienced in Battery Management Systems based on BQ products from TI. - Good experienced with Audio Codec chips.

Whether you plan to build an end-to-end commercial product, need a very specific industrial solution, or just want a helping hand on a personal project, I can help turn your ideas into reality. I am an Electrical Engineer with extensive experience in IoT, embedded systems, and full-stack web & mobile app development. This combination allows me to deliver complete, end-to-end solutions where hardware and software work seamlessly together. My areas of expertise: ✅ Firmware & Embedded Systems: C/C++ for NRF52, ESP32, STM32, Arduino, Raspberry Pi; IDEs and frameworks including VS Code, Segger, STM32CubeIDE, ESPHome, Nordic SDK, STM32Cube, PlatformIO. ✅ Cross-platform app development (Android, iOS, web): React Native + Expo, Flutter, Capacitor. Native development (Kotlin/Swift). Embedded/systems Rust. ✅ Databases, backend & server-side scripting: Firebase, Supabase, MySQL, PostgreSQL, MongoDB, InfluxDB; Node.js. ✅ Data Analytics & Machine Learning: MATLAB, Python. ✅ Server Management & IoT Platforms: AWS, Azure, Google Cloud. ✅ FPGA & HDL: VHDL/Verilog, Quartus, Lattice Diamond for design and simulation. ✅ Electronics & Circuit Design: PSpice, Eagle, Altium Designer, KiCad; full prototyping and testing capabilities. I have the resources to build and test prototypes in my in-house workshop and the experience of having cutsom PCBs built with manufacturers like PCBWay and JLCPCB. I've had the privilege of working with clients from all over the globe. I encourage you to explore the reviews and feedback from my previous clients to get a sense of their experiences. I value open communication and I'm dedicated to creating a collaborative and friendly working relationship where we can work together to turn your ideas into reality. I'm always eager to take on new challenges, continuously learn, and stay updated with new technologies.