🥇TOP B2B Company according to Clutch (7+ Clutch awards in total)🥇 🏆The most experienced IoT and embedded systems development agency on Upwork according to a number of successfully completed projects in the industry🏆 🚀We helped 6 customers to raise more than $5,000,000 on Crowdfunding platforms in total ✅ Hello there! My name is Sergey and I'm a Business Development Manager at Integra Sources. My main goal is to provide you with our expertise, skills, and technical knowledge so that your project requirements and priorities are always met, and the project is delivered perfectly and just in time. If any questions arise - please feel free to touch base with me. ✅ Who we are? We founded Integra Sources with an idea to create things deemed impossible and we've been successfully doing that since 2014. Since then, Integra Sources has completed more than 100 projects making happy more than 40 clients. We are proud to have a 90% client retention rate. Currently 50+ employees. ✅ What do we do? Integra provides professional services in the areas of IoT, electronic design, embedded systems, kernel and driver development, system and application software development, computer vision, and robotics. ✅ Why choose us? - Reliable electronic design team - All kinds of embedded software development - Full-stack software development capability - Dedicated project management - Effective testing techniques - Expected delivery - Support and maintenance - Privacy security ✅ How do we cooperate? - Project-based outsourcing - Dedicated development team - Research & development - Technology consulting - Solutions for startups Because we serve the needs of different kinds of businesses, we offer a choice of different frameworks that define collaboration between us and our clients. ✅ Industries we work with • IoT/consumer devices • Smart Home • Wearables • Industry • Healthcare • Sports • Entertainment ✅ What services do we offer? ✅ Electronic Design: • Embedded hardware • Power electronics • PCB design and layout • FPGA design Platforms: • STMicroelectronics: - STM32F4 Series (STM32F401, STM32F405/415, STM32F407/417, STM32F410, STM32F412, STM32F412/423, STM32F427/237, STM32F429/439, STM32F446, STM32F469/479) - STM32F2 Series (STM32F2x5, STM32F2x7) - STM32F7 Series (STM32F7x0, STM32F7x2, STM32Fx3, STM32F7x5, STM32F7x6, STM32F7x7, STM32F7x9) - STM32H7 Series (STM32H723/733, STM32H725/735, STM32H730, STM32H742, STM32H743/753, STM32H745/755, STM32H747/757, STM32H750, STM32H7A3/7B3, STM32H7B0) - STM32F0 Series (STM32F0x0, STM32F0x1, STM32F0x2, STM32F0x8) - STM32F1 Series (STM32F100, STM32F101, STM32F102, STM32F103, STM32F105/107) - STM32F3 Series (STM32F301, STM32F302, STM32F303, STM32F334, STM32F373, STM32F3x8) • Nordic Semiconductor: - nRF51 (nRF51822, nRF51422, nRF51824, nRF51802) - nRF52 (nRF52840, nRF52833, nRF52832, nRF52820, nRF52811, nRF52810, nRF52805) - nRF52 (nRF5340) - nRF91 (nRF9160) • Microchip Technology/Atmel - PIC16 MCUs (PIC16F18446, PIC16F19197, PIC16F15386, PIC16F18346, PIC16F1779, PIC16F18877, PIC16F1619, PIC16F1709, PIC12F1572) - PIC18 MCUs (PIC18-Q41, PIC18-Q43, PIC18-Q10, PIC18-K83, PIC18-K42, PIC18-K40) - PIC32 MCUs (PIC32MK, PIC32MZ EF, PIC32MZ DA, PIC32MM, PIC32MX) - SAM MCUs (SAM C, SAM D, SAM E, SAM G, SAM L, SAM S, SAM V, SAM 4E, SAM 4L, SAM 4N, SAM4S) - AVR MCUs (tinyAVR, megaAVR, AVR XMEGA) - CEC MCUs (CEC1712, CEC1302, CRC1702) • NXP Semiconductors - iMX RT (iMX RT1170/RT1064/RT1060/RT1020/RT1015/RT1010) - iMX 8 (iMX 8/8M Plus/8M/8M Min/8M Nano/8X) - iMX 7 (iMX 7ULP/7Solo/7Dual) - iMX 6 (iMX6ULZ/6ULL/6UltraLite/6SLL/6SoloLite/6SoloX/6Solo/6DualLite/6Dual/6DualPlus/6Quad/6QuadPlus) • Allwinner Technology - Allwinner A Series (A20, A33, A40i, A50, A63, A64) - Allwinner H Series (H2, H3, H6, H80) • Texas Instruments - C2000 MCUs - Hercules MCUs - MSP430 MCUs - Sitara processors • Infineon - XMC Series - Aurix Series • Xilinx • Intel • Silicon Labs • Freescale Semiconductor • Silicon Labs • Espressif Systems ECAD software: • Altium Designer • Eagle Cad • Cadence Allegro • OrCAD • KiCad • P-CAD ✅ Embedded Software Development: • Firmware • Board Support Package (BSP) Tools: • Visual GDB • Eclipse • Keil • IAR • CrossWorks IDE • Simplicity Studio • Code Composer Studio • Atmel Studio • STM32CubeIDE Languages: • C/C++, Assembler Real-time OSs: • FreeRTOS • Zephyr • ThreadX • NuttX ✅ Kernel and Driver Development: • Windows • Linux • Mac • Android Driver types: • Kernel-mode • User-mode • Virtual device drivers ✅ System and Application Software Development: • Desktop, Web and Mobile applications • Middleware • Cloud/IoT Solutions • Machine Learning • Computer Vision (OpenCV, TensorFlow) Platforms: • Windows, Linux, Mac, Android, iOS Languages/Frameworks: • C/C++, Qt, Python, Java, Kotlin, JS, Objective-C, Swift, PHP, C# ✅ Robotic Development: • Flying drones • Robots on wheels • Autonomous movement Technologies: • RTOS, ROS, Linux, OpenCV, Visual SLAM

I design and develop embedded electronic devices, working across hardware and firmware from initial design to production-ready systems. I work end-to-end: from schematics and KiCad PCB layout to firmware bring-up, debugging, validation, and preparation for manufacturing. Platforms & systems: • ESP32, STM32, nRF52 • C / C++, ESP-IDF, FreeRTOS, Zephyr, bare-metal Wireless & device protocols: • Wi-Fi, Bluetooth LE, Thread, Matter / HomeKit • Sub-GHz RF (433 / 315 MHz), infrared Hardware & production: • Multilayer PCB design in KiCad (fab-ready files, realistic BOMs) • Hardware bring-up, debugging, and validation • Preparing designs for manufacturing and real-world use Mechanical & product design: • Functional enclosure and mechanical part design (Fusion 360) • Design for 3D printing and rapid prototyping • Mechanical integration of electronics into real products Why work with me: • Production-first mindset — not just working prototypes • Strong understanding of hardware–firmware interaction • Clear communication and realistic timelines If you’re building a device and need an engineer who can turn it into a reliable, production-ready product — let’s talk.

I turn ESP32 ideas into boards you can actually manufacture. Schematic, PCB layout, production files, firmware. If you have a concept, a half-finished design, or a prototype that does not work, I can take it to a product that ships. What I do Hardware: schematic design and PCB layout in KiCad and EasyEDA, DRC clean Gerbers, BOM and Pick-and-Place ready for JLCPCB, AC/DC power circuits, battery and LiPo charging, sensor integration, thermal and low-power design. Firmware: ESP32 and ESP32-S3 in ESP-IDF and Arduino, LVGL touch interfaces, MQTT, BLE, Wi-Fi provisioning, OTA updates, deep sleep for battery products, payment integration. Cloud side when you need it: MQTT broker, database, and a web dashboard so the device is useful outside the lab. I work in your files, not only mine. Send me a KiCad project and you get a KiCad project back, with the libraries and footprints in place. Same for EasyEDA. If you need to move a design from one to the other, I can do that too, including symbol and footprint cleanup so the netlist survives the trip. Delivered 220V smart relays, environmental monitoring boards, sonar driver modules, vending machines and payment terminals, hydroponic and greenhouse controllers, USB-C rechargeable LED products, coin-cell LCD instruments, camera boards for remote monitoring, DMX controllers for cinema equipment. How I work I ask questions before I draw anything, because most board problems come from a wrong assumption, not a wrong footprint. You see the schematic before I start layout. You get documentation with pinouts, connector tables, and assembly notes, not just files. And I stay available during bring-up, since that is where the real issues appear. I also take over broken designs. Several clients came to me with a board that did not power up or a regulator wired wrong, and left with a working revision. Tell me what you are building and what it has to do. I will tell you honestly whether I am the right engineer for it, and what it will realistically take.

🛠️ Innovative geek and problem solver. Started at a young age with Android app development and web automation, ventured into Electrical Engineering degree, mastering circuit/PCB design, embedded systems, and IoT skills. 🌐🔌 Excels in 3D printing and 3D modeling as a side hobby. Designed and built 3D Printers and CNC machines out of the passion for robotics. 🖨️ Presently, leads a team of experts to offer complete product design and prototyping solutions. Let's craft your ideas into reality! 🚀

I am a Senior Electrical Engineer with a Master’s degree and 16 years of experience designing embedded electronic systems from concept through production. My work includes electronics architecture, schematic design, PCB layout, firmware development, server-side system integration, and prototype bring-up for low-volume and production hardware. I have extensive experience with PCB design and manufacturing, including over 10 years using Altium Designer, along with Eagle, KiCad, and other professional tools. My designs account for signal integrity, power integrity, EMC considerations, and manufacturability. I regularly support projects through prototype builds, validation, and transition to contract manufacturing. My technical background includes a wide range of sensors and subsystems such as temperature, humidity, time-of-flight, reflective sensors, load cells, RTDs, pressure sensors, light sensors, smoke detection, IMUs, magnetic sensors, mmWave radar, GPS, and image sensors. I design complete systems that integrate sensing, processing, power management, communications, and backend connectivity. I have developed designs involving bidirectional motor control, piezo mist drivers, servos, heaters, LED drivers, PMICs, battery charging and protection, audio systems with mixing and noise cancellation, RFID and NFC, AC-powered systems, switch-mode power supplies, vision systems, and closed-loop temperature control using PID. My embedded software experience includes bare-metal and RTOS-based development across a wide range of platforms, including PIC, AVR, SAMD and SAMG, STM32, nRF52, EFM32, MSP430, PSoC, LPC, Kinetis, i.MX, Jetson, and Raspberry Pi. I work with Microchip, Atmel, Nordic, ST, Silicon Labs, and Espressif toolchains, as well as FreeRTOS, uC/OS-III, Zephyr, and FPGA-based systems. I have significant experience with IoT system integration beyond the device level. This includes server-side communication protocols for connected products, backend services, databases, and client-facing applications. I have worked with REST APIs, MQTT, WebSockets, TCP/UDP, and custom protocols, using Python and Node.js on the server side, along with SQL and PostgreSQL databases. I have also developed web-based client portals using React and Bootstrap to support device management, data visualization, and system administration. Separately, I use Python extensively as a development and engineering tool. This includes writing scripts and utilities for automation, testing, debugging, manufacturing support, data analysis, and workflow integration during hardware and firmware development. I have designed wireless and connected products using ESP32 and ESP8266, nRF52, u-blox cellular modules, LoRa, Zigbee, and Z-Wave. These systems have been deployed across consumer, industrial, automotive, marine, aviation, and agricultural applications. Industry experience includes RV systems, drones, consumer electronics, industrial equipment, automotive lighting and heating, marine wireless sensor networks, aviation seat and heater controls, and agricultural equipment. I am comfortable working with both startups and established manufacturers and understand the tradeoffs required to move a design from prototype to production. I focus on building reliable, manufacturable systems and communicating clearly throughout the project. If you need an engineer who can own the hardware, firmware, and system integration end to end, I am ready to help.

14+ years of experience in embedded products design and development. Key skills: - Hardware Design - Firmware development - Wireless Technologies Expert (IoT products development using WiFi(2.4GHz, 5GHz, 6GHz), BLE, Cellular(2G/3G/4G/LTE,NB-IOT), GPS/GNSS, ZigBee, LoRa etc.) Hardware Design Expertise: • Components selection • Schematic design • Decide PCB stack-ups depending upon the application • PCB layout design • Library Creation, Symbol, and Footprint • Gerber Generation • Manufacturing files generation (pick n place, SMD mount, step, DWG, DXF) • PCB assembly and troubleshooting • End to end testing EDA Tools Expertise: • Cadosft Eagle • Altium Designer • Kicad Platform Experience: • Microchip, Atmel • Texas Instruments • Nordic • Nuvoton • Analog • Avr, Arduino • STM • SiLabs • Allwinner • Espressif • u-Blox • SIMCOM • Quectel Wireless Modules Experience: • SIM300, SIM800, SIM808, SIM900, SIM908, SIM5320E, SIM28ML, SIM7600, SIM7000C, SIM7020,SIM7090G • ESP8089, ESP12E/F, ESP32-WROOM, ESP32-S3, ESP32-WROVER • nRF24L01, RN171, HC05, HC03, HM10, RN42, Ublox NEO-6M, MAX-M8 • UC20G, BG95, BG96, MC60E, L70, L80 • BT840, E73-2G4M08S1CX, CBTN10, Wireless Socs Experience: • CC2530, CC2540,CC2541, CC2640,CC2650, CC2640R2F, CC430, CC1100, CC1101 • nRF51822,nRF51844, nRF52832,nRF52840,nRF9160,nRF52810, nRF52820, nRF5340, nRF52833, nRF52811, nRF7002, nRF54L15 • nRF905, BL600, CSR8670 • CC3100, CC3200 • ESP8266-EX, ESP32-S2, ESP32-S3,ESP32-C6 Development Tools and Compilers Experience : • Mplab IDE, MplabX IDE, Microchip C30, X16, X32 compilers • μVision Keil • Nordic studio • IAR workbench for 8051 and ARM • Code Composer Studio • Segger Embedded Studio • nRF connect for Desktop • Particle workbench • Arduino • ESP-IDF • VS Code • STM Cube IDE Protocols and Standard Experience : • I2C , SPI, UART/USART • Modbus, CAN, OBD-II • TCP/IP, UDP/IP, HTTP/S, FTP/S, DHCP, SMTP/S, MQTT/S • RS-232,RS-485, AIS138,J1772, ISO17017-1, OCPP 1.6J Sensors Integration and Peripherals Experience : • Infrared sensor, Proximity sensor • Temperature sensor, Humidity sensor, Pressure sensor • Accelerometer, Gyroscope • CO2 sensor, Soil moisture sensor, Loadcell sensor • Heart rate sensor • Matrix Keypad, Dot-matrix Display, LCD, OLED display, TFT display • Water Flow sensor • Light sensor • Occupancy sensor, TOF sensor Evaluation Boards Experience : • Raspberry Pi Zero/2/3/4/5 • Beaglebone black • Olinuxino A10 • STM32F discovery board • PIC32F development board • CC2640R2F EVM, CC2650 EVM • Firefly RK3288 development board • Arduino Uno, Atmega256 development board • ESP32-WROOM DevKit, ESP12F development kit, Argon Development board, nRF52832-DK, nRF52833-DK, nRF52840-DK, ESP32-S3 DevKit, ESP32-C6 DevKit, nRF5340-DK, nRF7002-DK, nRF54L15-DK Embedded Systems Expertise: • Requirement analysis and research • Firmware development on microcontrollers/microprocessors • ARM 7, ARM Cortex A8, ARM Cortex A9, ARM Cortex M0, ARM Cortex M3, ARM Cortex M4, ARM Cortex M33 • Wireless drivers and applications for WiFi, LoRa, BLE, Cellular, GPS/GNSS, RFID, NFC • IoT product development • Protocols knowledge and implementation • Networking protocols • Hands-on experience on development boards • Sensors integration • Vehicle Health System using OBD-II • Embedded C, C++, Python, and Shell Scripting • Windows, Linux, TI-RTOS, TI-SIMPLE LINK, Free RTOS, Zephyr RTOS, AWS FreeRTOS

I help startups, product teams, and engineering companies turn embedded product ideas into working hardware, firmware, connected IoT systems, AI-enabled devices, and mobile/cloud platforms. I lead MHTechFusion, an embedded systems and IoT engineering team with hands-on experience in PCB design, firmware development, BLE, hardware bring-up, prototyping, wireless connectivity, AI/computer vision integration, LLM/RAG applications, mobile app integration, and end-to-end product development. We support clients from early concept and feasibility stage to schematic design, PCB layout, firmware development, testing, manufacturing files, and prototype validation. Core areas I can support: -Embedded Hardware & PCB Design: ESP32, STM32, nRF52, Raspberry Pi, sensor boards, wearable electronics, power circuits, communication interfaces, multilayer PCB design, Gerbers, BOM, Pick and Place files, and DFM support. -Firmware Development: C/C++, FreeRTOS, Zephyr, BLE, Wi-Fi, LoRa, CAN, OBD-II, UART, SPI, I2C, ADC, bootloaders, OTA updates, low-power firmware, and hardware bring-up. -IoT & Connected Products: Cloud dashboards, mobile app integration, device communication, MQTT, REST APIs, data logging, alerts, and remote monitoring systems. -AI, Computer Vision & LLM/RAG: Computer vision pipelines, AI-assisted inspection, object detection, OCR/ANPR-style systems, edge AI integration, LLM-based assistants, RAG systems, document intelligence, approval workflows, and AI-enabled dashboards. -Mobile & Web Applications: iOS and Android companion apps, Flutter/mobile app integration, device configuration apps, BLE/Wi-Fi device pairing, dashboards, admin panels, backend APIs, and cloud-connected product interfaces. -Testing & Prototyping: Prototype assembly coordination, lab testing, debugging, firmware flashing, signal validation, and product iteration. Recent project experience includes wearable electronics, smartwatch PCB and firmware, automotive CAN/OBD-II tools, LoRaWAN monitoring systems, industrial control boards, ESP32/STM32 firmware, custom PCBs, AI/computer vision systems, LLM/RAG platforms, iOS/Android apps, and cloud-connected IoT products. My working style is practical and milestone-based. I first understand the technical requirements, identify risks early, and then break the project into clear phases so the client knows exactly what will be delivered at each step. If you need reliable support for embedded systems, hardware, firmware, BLE, IoT, AI-enabled products, mobile apps, or cloud-connected product development, I would be happy to discuss your project.

I am a professional embedded software engineer with more than ten years of experience. My current areas of expertise are IoT Applications & Embedded Systems Design, including embedded hardware/software. - Connectivity Domain Ethernet 802.3, WLAN (Wireless 802.11), Bluetooth Low Energy protocol stack, and low layer I2C, SPI, UART, RS485, etc. technologies. - Good exposure and worked with various protocols likes I2C, SPI, UART, CAN. - Proficient with ESP32, Raspberry Pi, Atmel, ARM, PIC32, Renesas boards, and communication with various sensors. - Experienced in Android framework & HAL layer exploration, development, Customization and bug fixing on Qualcomm development boards. - 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 - Experienced in AWS Service, AWS IoT. 🔑𝐊𝐄𝐘𝐖𝐎𝐑𝐃𝐒: Embedded Design, Hardware Design, Firmware Development, Mobile App Integration, IoT Device, Medical Device Design, Embedded Systems, Real-time Operating Systems (RTOS), Microcontroller Programming, Sensor Integration, Wireless Communication (Bluetooth, Wi-Fi), Low Power Design, Wearable Devices, Firmware Architecture, Embedded Software, Device Drivers, System-on-Chip (SoC), PCB Design, Signal Processing, IoT Platforms, Cloud Integration, Mobile App Development, Web Portal Design, Healthcare Technology, Remote Monitoring, Data Security, Telemetry, ARM Cortex, ESP32, Device Connectivity, Embedded Prototyping, Human-Machine Interface (HMI), Medical Device Compliance, Mobile-Connected Devices, IoT Security, BLE, Firmware Debugging, Connectivity Solutions, Edge Computing, Smart Devices, Industrial IoT.

As a Top-rated Upwork freelancer and experienced Hardware Engineer, I thrive on designing and developing complete electronic systems that solve real-world engineering challenges. My work blends deep technical expertise in PCB design, RF engineering, and embedded systems with a strong focus on building production-ready, reliable, and scalable hardware products. Over the years, I’ve worked across the full hardware development cycle — from concept, schematic design, and PCB layout to firmware development, prototyping, RF optimization, and manufacturing support. I enjoy turning complex ideas into functional, manufacturable electronic systems that perform reliably in real environments. Here's a snapshot of the domains I've mastered: Hardware Specialties 💻🔌 ✅ Embedded Systems Development: Expert in designing embedded solutions using ESP32, STM32, PIC, Arduino, and Raspberry Pi (including CM4/CM5 platforms). I handle everything from low-level firmware (C/C++) to hardware integration, real-time control systems, and IoT-enabled devices. ✅ PCB Design & Hardware Engineering: Advanced experience in schematic design, multilayer PCB layout (2–16 layers), high-speed routing, power distribution, signal integrity, and EMI/EMC-aware design. I focus on turning circuits into robust, production-ready boards. ✅ RF & Microwave Engineering: Specialized in RF circuit design, antenna development, and electromagnetic simulation using CST, HFSS, ADS, and 4NEC2. My work includes LoRa, GPS, RFID, wireless communication systems, and RF optimization for real-world performance. ✅ Wireless & IoT Systems: Designing connected systems using Bluetooth, WiFi, LoRa, and custom RF protocols. I develop IoT devices for automation, monitoring, sensing, and smart control applications. ✅ Sensor & Embedded Integration: Experience with MEMS/IMU, GPS modules, RFID systems, displays, motor drivers, and industrial sensors for data acquisition and intelligent control systems. Design Tools 🧰 Altium Designer | KiCad | EasyEDA | CST Studio Suite | HFSS | ADS | MATLAB & Simulink | LTspice | NI Multisim | Proteus | 4NEC2 Project Experience 🚀 ✔ Raspberry Pi CM4/CM5 Carrier Board Development ✔ High-speed Multilayer PCB Design for complex systems ✔ ESP32, STM32 & Arduino-based embedded products ✔ RF & Antenna Design for LoRa, GPS, and RFID systems ✔ IoT & Wireless Communication Devices ✔ Motor Control & Automation Systems ✔ Power Electronics & DC-DC Converter Designs ✔ Custom Sensor-based Data Acquisition Systems ✔ Smart Home & Industrial Automation Solutions ✔ Prototype development to manufacturing-ready hardware My approach is centered around engineering precision, manufacturability, and system-level reliability. Whether it’s a small embedded controller or a complex RF-enabled multi-layer system, I ensure every design is optimized for performance, stability, and real-world deployment. I also support full product development — from initial architecture and schematic design to firmware, debugging, testing, and production assistance. I’m always excited to collaborate on innovative hardware ideas and help transform concepts into fully functional electronic products ready for manufacturing and deployment. Tags: Electrical Engineer, Electronics, Hardware Design, PCB Design, PCB Layout, RF Engineering, Antenna Design, Embedded Systems, Firmware Development, ESP32, STM32, Arduino, Raspberry Pi, IoT, Signal Integrity, EMC Design, High-Speed PCB, LoRa, GPS, RFID, Microwave Engineering, Altium Designer, KiCad, CST, HFSS, ADS, Power Electronics, Automation Systems, C, C++, Embedded C, RTOS, Wireless Communication, Prototyping, Manufacturing Support. Warm Regards, Muhammad Waleed

A versatile Embedded Systems & IoT Expert I bring a unique blend of expertise in Embedded systems, PCB High Speed designs and IoT app development. - Embedded Systems Expert (C/C++) - STM32, Arduino, ESP32 boards and Raspberry PIs - PCB Mixed Signal and High Speed Design - FPGAs, Verilog/VHDL - Assembly Language (x86, MIPS, Arm/Thumb) - ROS Robotics, Drones, IMUs applications - Native and Cross platform BLE/IoT Mobile App development With hands-on experience in creating advanced projects like drones, robotic arms, IMU gloves and developing path planning and navigation systems utilizing depth cameras for autonomous robots, I excel at integrating cutting-edge technology to solve complex problems. My skills extend to app development for Android, iOS, and web platforms, IoT apps and Sensor Integration ensuring comprehensive solutions for diverse needs. Let's collaborate to transform your ideas into a Reality!