Hire the Best Firmware Engineers
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Embedded hardware and firmware engineer with 25+ years of experience developing electronic devices from idea to production. I design schematics, PCBs, embedded firmware and help clients bring prototypes to manufacturable products. Experience includes industrial electronics, battery-powered devices, IoT, sensors, communications interfaces and microcontroller firmware.

❤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.

I am a Hardware Engineer with 10+ 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: Professional PCB Design & Schematic Capture - High-quality PCB Design delivery using Altium and KiCad with 100+ commercial products launched globally. - Schematic development and PCB Design for high-density multilayer boards (up to 16+ layers, microvias, HDI). - Hardware Design focusing on DFM/DFA, achieving 98% First-Time-Right fabrication with zero board respins. - Expertise as a PCB Designer in Altium Designer, KiCad PCB, and EasyEDA with 10,000+ hours of hands-on layout experience. - PCB Design for PCB Audio, RF (up to 6+ GHz), and high-speed digital interfaces (DDR4/PCIe Gen4 length matching). - Professional PCB Design and Circuit Designer services for Electronics projects, cutting time-to-market by 30% via IPC-Class 3 compliance. Expert Microcontroller Programming & Firmware: - Expert Microcontroller Programming for diverse industrial and consumer platforms with 99.9% uptime in production. - Microcontroller Programming for ESP32, STM32, Arduino, and Raspberry Pi, covering 200+ deployed nodes. - Embedded Systems development using Embedded C and C language, optimizing memory footprint by up to 40%. - Custom Firmware and Embedded Software for Embedded Systems IoT applications with MISRA C compliance and AES-256 security. - Advanced Microcontroller Programming for ESP32 Firmware, STM32 HAL, and Arduino Programmer tasks with FreeRTOS multi-threading. - Embedded Systems and Microcontroller Programming for Robotics and Python-based logic, accelerating sensor polling rates by 3x. 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, managing $500K+ in R&D budgets. - IoT architecture for ESP32 and Raspberry Pi systems, supporting 10k+ active concurrent devices in the cloud. - Embedded Systems Engineer services for Embedded Systems with long-range connectivity (LoRaWAN/LTE-M up to 15km range). - Integration of Schematic designs with Antenna Design and PCB Firmware, improving signal integrity and wireless range by 25-30%. - Deployment of Embedded Systems for AgTech (PivotHawk) and industrial monitoring across 50,000+ hectares / 100+ industrial sites. Mechanical Design & Enclosure Development - Bridging the gap between an Electrical Engineer and a Mechanical Engineer, ensuring 0mm clearance errors via precise ECAD-MCAD co-design. - Mechanical Design using SolidWorks, AutoCAD, and CAD tools with 0.05mm tolerance precision. - Enclosure Design and Industrial Design for IP-rated devices (up to IP67/IP68 water & dustproof standards). - Professional Mechanical Design Engineer and Enclosure Designer support, optimizing parts for injection molding to cut tooling costs by 20%. - Mechanical Designer services for custom Hardware housing, validated through 50+ rapid prototypes (3D-printed ASA/SLA). 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❗

Over the last 10 years, I have developed a wide range of prototype and mass electronics devices using C/C++,RTOS, Embedded Linux, PCB and enclosure design. Many of the devices have different wireless modules, such as GSM/GPRS, 3G, WiFi, Bluetooth (5.0, 5.2), GPS, Lora and different microcontrollers (STM32, NRF52, PIC32, Atmel, NXP). I also have experience in design electronics devices with embedded Ethernet, POE, RS485, CAN, Web-server and USB interface. Worked with different graphics library for TFT, e-INK, LCD displays.

Full-Cycle Hardware & Embedded Engineer | PCB · Firmware · Linux · $200K+ Earned | 12 Years I take hardware products from schematic to working prototype — covering PCB design, embedded firmware, and bench validation as one integrated process. Whether you're building an IoT device, an industrial controller, or a consumer electronics product, having the PCB design and firmware developed by the same engineer eliminates handoff gaps and avoids costly re-spins. With 12+ years of experience, $200K+ earned on Upwork, and a 100% Job Success Score across 35 completed projects, I deliver end-to-end embedded product development from first schematic to production-ready hardware. I work best with product companies and engineering teams who need a reliable technical partner, not just a file deliverable. ━━━━━━━━━━━━━━━ ⚡ WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━ ✅ $200K+ earned | 100% Job Success Score | Top Rated ✅ 12+ years of PCB design and embedded systems engineering ✅ Full in-house lab — I build and test what I design, not just send files ✅ End-to-end: PCB design → firmware → embedded Linux → software → prototype validation ✅ Flexible toolset: Altium Designer (preferred for complex PCB layout), Eagle, KiCad, Fusion 360, SolidWorks — I adapt to your workflow ✅ Team-ready: experienced working as a technical partner inside product companies and cross-functional teams ━━━━━━━━━━━━━━━ 🔧 PCB DESIGN ━━━━━━━━━━━━━━━ Tools: Altium Designer (primary — schematic capture and PCB layout), Eagle, KiCad, Fusion 360 • Multi-layer PCB design — 2 to 12+ layers, rigid, flexible, and rigid-flex • PCB layout for IoT devices, industrial control boards, and consumer electronics • High-speed interfaces: USB 2.0/3.0, Ethernet, DDR3/DDR4, HDMI, PCIe, LVDS • Controlled impedance, differential pairs, length matching • Mixed-signal and analog design: ADC/DAC front-ends, power electronics, op-amp circuits, filters • EMI/EMC-optimized layouts, signal and power integrity • Design for Manufacturing (DFM/DFA): Gerbers, BOM, assembly drawings, CPL files • Component selection and BOM cost optimization ━━━━━━━━━━━━━━━ ⚙️ EMBEDDED FIRMWARE — C / C++ ━━━━━━━━━━━━━━━ • Bare-metal and RTOS firmware: STM32, ESP32, AVR/ATmega, ARM Cortex-M, NXP, Nordic nRF52 • FreeRTOS: task scheduling, inter-process communication, low-power optimization • Wireless: BLE 4/5, Wi-Fi, LoRa/LoRaWAN, GSM/LTE, NB-IoT, GNSS • Peripheral drivers: SPI, I2C, UART, CAN, RS485, USB, ADC, PWM, DAC • Bootloaders, OTA firmware updates, hardware diagnostics and logging ━━━━━━━━━━━━━━━ 🐧 EMBEDDED LINUX ━━━━━━━━━━━━━━━ • Linux-based products on iMX6, STM32MP, Raspberry Pi, and custom SoMs • Custom Linux drivers, application development, system-level integration • Cloud and IoT connectivity: MQTT, AWS IoT, REST APIs • Build systems: Yocto, Buildroot ━━━━━━━━━━━━━━━ 💻 SOFTWARE & TOOLS ━━━━━━━━━━━━━━━ • Python: test automation, data processing, scripting, GUI applications • C++ desktop and GUI applications (Qt, ImGUI) • Computer vision: OpenCV pipelines for embedded and edge platforms • 3D mechanical design: SolidWorks — enclosures, brackets, electromechanical integration • 3D scanning and point cloud processing ━━━━━━━━━━━━━━━ 🔬 IN-HOUSE LAB & HARDWARE VALIDATION ━━━━━━━━━━━━━━━ I don't just send files — I build and validate. My in-house lab covers hardware bring-up, PCB layout review and debugging, signal integrity testing, and prototype validation: oscilloscopes, logic analyzers, soldering and rework stations, programmable power supplies, and more. This means fewer surprises for you at the prototype stage — and zero surprises at manufacturing. ━━━━━━━━━━━━━━━ 🏭 INDUSTRIES ━━━━━━━━━━━━━━━ ✔ IoT & Connected Devices ✔ Industrial Automation & Control ✔ Consumer Electronics ✔ Embedded Linux Products ✔ Robotics & Motion Control ✔ Computer Vision & Machine Vision Systems ━━━━━━━━━━━━━━━ 📦 WHAT YOU RECEIVE ━━━━━━━━━━━━━━━ Each project includes complete, manufacturing-ready documentation: • Schematic source files • PCB layout files (Altium / Eagle / KiCad native format) • Gerber + NC Drill files • Bill of Materials (BOM) • Assembly drawings and CPL files • Firmware source code with comments ━━━━━━━━━━━━━━━ 📩 LET'S WORK TOGETHER ━━━━━━━━━━━━━━━ I prefer working with product companies and engineering teams on IoT, industrial, and embedded projects where full hardware-software integration matters. If that sounds like you — send a message with your project details and I'll respond with a clear assessment and plan. ━━━━━━━━━━━━━━━ 🔑 KEYWORDS ━━━━━━━━━━━━━━━ PCB Design, Altium Designer, Eagle, KiCad, Embedded Systems, Firmware Development, Embedded C, C++, STM32, ESP32, ATmega, AVR, ARM Cortex, Nordic nRF52, Embedded Linux, iMX6, STM32MP, FreeRTOS, Raspberry Pi, BLE, Wi-Fi, LoRa, LoRaWAN, MQTT, IoT, Python, Industrial, Schematic Design, PCB Layout, Multilayer PCB, High-Speed PCB, SolidWorks, EMI/EMC, DFM, DFA, BOM, Gerber, Mixed-Signal, Signal Integrity, Rigid-Flex PCB, RS485

✅ 100% Client Recommendation ✅ Top Embedded and Firmware developer ✅ Top Hardware designer ✅ Top Software design ✅ Top Mechanical design and industrial design ✅ Top Enclosure design Services: 1) Hardware/Electronics design (Power, Analog, Digital/High-speed and RF electronics design) 2) Precertification testing (EMI, ESD, EMC, FCC, CE, UL) 3) Firmware design С/C++ (Bare metal MCU/MPU, FreeRTOS, Zephyr RTOS, Embedded Linux, Wireless protocols, Security, Interfaces, etc) 4) Industrial and Mechanical design (Enclosure design, 3D printing, IP standards, Prepare all for injection molding, etc) 5) UX/UI design (Embedded devices with displays, Mobile and Desktop applications) 6) Software design (Android, IOS, Linux kernel and user space development) 7) Embedded Quality Assurance(QA) and testing 8) Manual verification/testing PCB/FPC, functional and unit testing of the Firmware/Software, stress testing, temperature range testing Service->Hardware design service: - Power electronics design: (PFC, Solar charging controller, chargers, high voltage control, Motor controllers DC/AC/BLDC ) - Analog electronics design: High-accuracy analog measurements, Noise filtration, Digital to analog conversion, Amplifying signal - Digital and high-speed electronics design: - Memories DDRx/LPDDRx, SDRAM, Camera and display interfaces (MIPI-DSI, MIPI-CSI, DisplayPort, etc), Data communication interfaces (QSpi, SPI, UART, I2C, FMC, I2S, USB 2/3.x, etc), ( - RF Designs: ( 50-60 GHz (Radars), 1-6 GHz (UWB, Wifi, BLE, ZigBee, GPS, NB-IoT, LTE-M/LTE, Z-Wave, etc), 13,6 MHz, 128 kHz (NFC, RFID, etc), 433 MHz (Custom protocols) Service->Industrial and Mechanical design - Industrial design of the sketch - it includes a few sketch designs, depending on the physical sizes of the device, specific of industry and user experience - Mechnical CAD design with deep PCB integration - it includes full mechanical draw based on the industrial design with detailed sizes, materials and manufacturing specific. - Thermal calculation and simulation - it includes simulation of the heating device inside enclosure, with theoretical cooling calculation - 3D printing and verification - we use 3D printer hp jet fusion 5210, with a very nice quality of printing, that helps us to make a good verification of parts with PCBs - Injection molding - the last step, which includes manufacturing optimization and making pres forms, preparing documentation for the manufacturing Service->Firmware design С/C++: - Languages: C/C++, Assembler - Diagrams: Block, UML, Workflow, APIs - Interfaces: I2S, SAI, MIPI-DSI, MIPI-CSI, USB 2/3.x, LTDC, DDR3/DDR4/LPDDR4, I2C, SPI/QSPI, UART, CAN, Ethernet - Wireless: NB-IoT, LTE M, GPRS, GPS, LTE, UWB, WiFi, BLE, ZigBee, Z-Wave, LoRa, Thread, 6LoWPAN, Sub 1GHz, NFC (13,6 MHz), RFID 433 MHZ and 128 kHz - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Security: AES, SSL/TLS, custom algorithms - Libs and frameworks: TouchGFX (GUI lib for MCU), emWin (GUI lib for MCU), LVGL (GUI lib for MCU), WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), osxMotionFX (Sensors fusion algorithm based on the Kalman theory), FatFS, lwIP (TCP/IP stack), WICED (Wifi stack), aws/amazon-freertos, Paho MQTT, TensorFlow - Embedded OS: FreeRTOS, TI-RTOS, ZephyrOs, Embedded Linux, Yocto, ROS - MCUs: NXP (i.MX RT1064, LPC1100, LPC4000), Nordic (NRF52xx/NRF53xx/NRF91xx), TI (CC3220/CC26xx/CC1100/CC3200, MSP430), Espressif (esp32, esp8266), ST(STM32H7/F7/F4/L4/F0/L0/WB/WL/G0 and STM8), Atmel/Microchip(SAM D20/D21/L21/R21/V70/V71, SAMA5/SAM4/SAMD4), Silicon Labs(EFR32, ZGM130S), Cypress (PSoC 3/PSoC 4), Kinetis (Family MK81FN256VDC15), Holtek (HT68xx) - MPUs: Analog Devices (ADSP-2156x SHARC), Qualcomm (Snapdragon 625/425/610/845), Allwinner (A64, A33, H3, H6 series), NXP (I.MX6/I.MX7/I.M8) , ST(STM32MP1) - SOMs: NVIDIA Jetson nano, NVIDIA Jetson Orin Nano, NVIDIA Jetson AGX Orin, Toradex (Colibri iMX6, IMX7, IMX8), Raspberry pi (CM3, CM4 modules), Inforce (Qualcomm Snapdragon 410, 820, 845 SOM), 8devices (Mango on Qualcomm IPQ6000/IPQ6010 Soc), Sensiedge(SensiBle 1 and 2, SensiLora) Service->Software: - Languages: Java, Kotlin, C#, C/C++, Python, Java Script - Diagrams: Block, UML, Workflow, APIs - Interfaces: USB, Ethernet - Protocols : MQTT, HTTP, FTP, Modbus TCP/RTU, SNMP, TCP/IP, UDP/IP, DLMS, custom protocols - Wireless: BLE, WiFi, UWB - Security: AES, SSL/TLS - Libs and frameworks: GStreamer, Paho MQTT, WolfSSL (SSL/TLS), Mbed TLS(SSL/TLS), QT framework, Xamarin Forms and Maui, ASP .NET Core and web development, React (web UI development), SQLite DB, FireBase DB, Mong DB, InfuxDB DB, Room, TensorFlow, Node.js - OS: Android, IOS, Linux, Windows