Hire the Best ESP32 Freelancers
in Ukraine

I am a Hardware Engineer with 6+ years of experience in PCB Design, Microcontroller Programming, and Embedded Systems development. I specialize in building robust Hardware solutions using ESP32, STM32, Arduino, and Raspberry Pi platforms. From initial Schematic capture in Altium or KiCad to final production-ready devices, I deliver high-performance electronics that work in the field. Highlights: - 100% Client success score - 95% first-pass PCB success rate across 100+ boards - Reduced BOM cost by 10–20% per unit through component optimization - Designed and reviewed 100+ PCBs across IoT, industrial, and automotive sectors - Firmware optimized on battery-powered ESP32 devices 📍 Core Services: 1. Professional PCB Design & Schematic Capture - High-quality PCB Design delivery using industry-standard tools like Altium and KiCad. - Schematic development and PCB Design for multilayer boards. - Hardware Design focusing on DFM/DFA (Design for Manufacturing). - Expertise as a PCB Designer in Altium Designer, KiCad PCB, and EasyEDA. - PCB Design for PCB Audio, RF, and high-speed digital interfaces. - Professional PCB Design and Circuit Designer services for Electronics projects. 2. Expert Microcontroller Programming & Firmware - Expert Microcontroller Programming for diverse industrial and consumer platforms. - Microcontroller Programming for ESP32, STM32, Arduino, and Raspberry Pi. - Embedded Systems development using Embedded C and C language. - Custom Firmware and Embedded Software for Embedded Systems IoT applications. - Advanced Microcontroller Programming for ESP32 Firmware, STM32 HAL, and Arduino Programmer tasks. - Embedded Systems and Microcontroller Programming for Robotics and Python-based logic. 3. Strategic Leadership & IoT Solutions - I lead ARTAXE Electronics, a hardware engineering team. As CEO and Electronics Engineer, I ensure every Embedded Systems project is scalable and commercially viable. - IoT architecture for ESP32 and Raspberry Pi systems. - Embedded Systems Engineer services for Embedded Systems with long-range connectivity. - Integration of Schematic designs with Antenna Design and PCB Firmware. - Deployment of Embedded Systems for AgTech (PivotHawk) and industrial monitoring. 4. Mechanical Design & Enclosure Development - Bridging the gap between an Electrical Engineer and a Mechanical Engineer. - Mechanical Design using SolidWorks, AutoCAD, and CAD tools. - Enclosure Design and Industrial Design for IP-rated devices. - Professional Mechanical Design Engineer and Enclosure Designer support. - Mechanical Designer services for custom Hardware housing. Why Partner With Me❓ ✅ Altium & KiCad Mastery: Expertise in Altium for high-end professional projects and KiCad for open-source flexibility. The workflow in Altium ensures precision, while KiCad provides cost-efficiency. ✅ Prototyping & Production: I don't just create a Schematic; I deliver a working device. From Arduino prototypes to STM32 production units. ✅ Comprehensive Hardware Support: Every Hardware project includes a thorough Schematic review and PCB Design Circuit Design validation. ✅ Reliable Microcontroller Programming: Providing Embedded Engineer grade code for ESP32, STM32, and Raspberry Pi nodes. 💡 Technical Toolkit: ✅ Software: Altium, KiCad, EagleCAD, EasyEDA, SolidWorks, AutoCAD. ✅ Platforms: ESP32, STM32, Arduino, Raspberry Pi, nRF52, i.MX8. ✅ Focus: Embedded Systems, IoT, PCB Design, Microcontroller Programming. Ready to bring your hardware vision to life❓ From the initial Schematic stage to the final PCB Design and production support, I am dedicated to your project's success. Whether you need a simple prototype or a complex Hardware system, let's discuss how my expertise can drive your innovation forward. ❗ Click the "Message" or "Invite" button to start a conversation about your project today❗

❤Thank you for visiting my profile.❤ My name is Tetiana Medetska, a dedicated Electronic Hardware and Firmware Engineer specializing in creating innovative and high-quality solutions for electronic product development. I am passionate about transforming ideas into reality through meticulous design and development. -Core Competencies: -PCB Design & Development: Expert in designing reliable, high-performance printed circuit boards (PCBs). Specialization in power supply circuits (DC-DC, AC-DC conversions) and multilayer designs for embedded systems. Proven track record in developing efficient LED driver circuits and RF PCB layouts. -Firmware Development: Extensive experience programming microcontrollers including STM32, DSPIC, ESP32 and ESP8266. Mastery of communication protocols such as UART, SPI, Ethernet, USB, CAN, and MODBUS for seamless integration. Proficient in implementing wireless technologies including Wi-Fi, Bluetooth, and ZigBee. -RF Design & Analysis: Strong capabilities in RF circuit design, antenna optimization, and simulation for applications like WiFi, Bluetooth, and RFID. Expertise in developing RF filters, splitters, transceivers, and power amplifiers tailored to specific application needs. I am committed to delivering cost-effective, high-quality solutions without compromising performance or deadlines. I welcome the opportunity to connect and discuss how I can contribute to your projects.

Nordic Bluetooth, Zephyr, nRF Connect SDK, nRF Mesh, Cypress/Infineon BT/WiFi, STM32, Silabs, Espressif ESP32, NEC/Renesas/Dialog, Atmel/Microchip, Arduino preferably. C/C#/Python Have over 11 years of professional experience in electronics development, embedded systems, hardware design, IoT. In past I have worked for prosperous Startup, manufacturer company and have designed electronics products from scratch to mass production. Experienced in development and testing of embedded systems. MCU: Nordic nrf52 BT SoC. Espressif ESP32 WiFi BT. Cypress/Infineon PSoC6 BT/WiFi WICED ST STM32 F0, L4, L4+ Cortex-M0-M4. ST Bluetooth 5 BLUENRG-2 SiLabs (Energy Micro) EFM32 ARM Cortex-M3 Atmel AT90S, ATtiny, ATMEGA, XMEGA.. Microchip 12F, 16F, 18F. Renesas/Dialog (Nec) 78k. DA. Rockchip. Development Tools - Eclipse - IAR - CodeVisionAVR - Keil µVision IDE. - Visual Studio - Altium - GCC - CCS C Compiler - Arduino VERSION CONTROL/BAG TRACKING - SVN - Git - Jira - Asana

🎯 Experienced Embedded Software Developer delivering reliable, secure, and scalable firmware for IoT and smart devices. With over 10 years of hands-on experience, I’ve built embedded systems deployed in commercial products across international markets, including Europe. I specialize in low-level programming, real-time architectures, and secure communication protocols across diverse hardware platforms. Passionate about building embedded systems from scratch -integrating low-level drivers, designing scalable architectures, and crafting intuitive device logic with user interaction in mind. I enjoy working across the entire stack, ensuring that each layer - from hardware abstraction to application behavior - is thoughtfully designed, efficient, and reliable, even in resource-constrained environments. Strong communicator with experience leading small development teams and collaborating with clients, committed to supporting products through their full lifecycle - from development to long-term maintenance and improvement. 🤝 I’m ready to help bring your idea to life. Feel free to reach out anytime. 🛠️ Technical Skills Programming languages & IDEs: - Embedded C/C++ - primary language for firmware development - Python - used for utilities, scripting, and support tools - IDE - VS Code, IAR Embedded Workbench, STM32CubeIDE, System Workbench, Eclipse Microcontrollers & SDK: - STM32 (F1x, F2x, F4x, H7), STM8, ESP32, ESP8266, nRF52, AVR - STM32-HAL, STM-SPL, ESP-IDF, nRF SDK RTOS - FreeRTOS Connectivity & Communication - Wi-Fi, Ethernet, BLE - TCP/IP (LwIP), MQTT, HTTP/HTTPS, SNMP, FTP, SMTP, SNTP, WebSocket, Modbus - UART, SPI, I2C, RS232, RS485, 1-Wire, CAN, MDB, USB Cryptography & Security - MbedTLS - Symmetric encryption algorithms: AES - Asymmetric encryption algorithms: RSA, ECC - Digital signature algorithms: ECDSA - TLS/SSL communication, including client- and server-side handshake flows - Applied cryptographic techniques in bootloaders, firmware protection, and OTA update mechanisms File Systems & Storage - FatFs, LittleFS - Accessed and managed EEPROM and FLASH memory across various platforms - Applied storage techniques in bootloaders, data logging, and firmware update systems GUI Development: - Develop embedded web interfaces for fast, user-friendly device setup and management - TouchGFX - creating GUI for TFT & LCDs - Develop custom framebuffer algorithms optimized for TFT & LCD operation in low-resource embedded systems Bootloader & Firmware Updates - Develop custom bootloaders for STM32 - Design secure firmware update mechanisms with encrypted and signed packages - Implement OTA updates over Wi-Fi and Ethernet - Work with dual-bank architectures, rollback logic, and update validation - Integrate version control, update file formats, and fail-safe recovery paths - Apply digital signatures and hash verification to ensure firmware integrity Compliance & Certification - Experienced in ensuring Radio Equipment Directive (2014/53/EU) compliance for embedded devices, including meeting regulatory requirements and preparing the necessary technical documentation Other Tools & Practices - Version Control: Experienced in Git for source code management and collaborative development - Hardware Interaction: Skilled in reading schematics and performing soldering tasks, including surface-mount (SMD) components - Diagnostics & Debugging: Skilled in using logic analyzers and oscilloscopes for signal analysis and troubleshooting embedded systems - Arduino - PlatformIO

I’m an Electronic Engineer. I have more than 5 years working in the electronic world as a developer. I have skills to solve both software and hardware tasks based on: arduino, rp2040, esp32, different PLC like Omron, stm32, FPGA. I prefer to design electronic boards in KiCad. I always make 3D models of future boards and advise clients on ordering these boards from manufacturers such as JLCPCB, PCBway. I can also develop a future board case using Solidworks. My main work is the development of control systems for elevators and various technological equipment, such as slicers for the bread industry, autoclaves, etc. So I can help with the invention of an electrical circuit diagram for controlling various mechanisms.

Wide range of experience in firmware development for different embedded systems and MCUs: - STM32 series F0, F1, F4, G0: digital & analog environmental sensors, SD card, bootloaders, communication with GSM modules; - ESP32: LCD, touch controller, BLE hub for monitoring wireless sensors with proprietary protocol, customized websocket client, driver for industrial vent actuator controlled by WIFI; - CC2541: customized BLE environmental sensor with proprietary backend protocol. - NRF52: smart lock, communication with external sensors. Computer vision & video recognition: - tracking objects using color pattern detection; - finding parameters of electrical SMD components (as part of customer's concept). Additional knowledge: - protocols: SPI, I2C, USART, RS485; - Bluetooth low energy (BLE); - OpenCV.