Hire the Best Embedded Systems Engineers

Hey, I’m Dosithée— an Embedded Design Engineer with over eight years of professional experience in embedded systems, electronics design, and firmware development. I focus on building robust, efficient, and production-ready solutions, turning complex ideas into reliable hardware and software products. Experienced across a wide range of architectures and vendors, including: 🔹 Microcontrollers & SoCs - Nordic Semiconductor: nRF51, nRF52, nRF53 - Texas Instruments: CC13xx, CC25xx, CC26xx, CC32xx - STMicroelectronics: STM8, STM32, BlueNRG-1/2 - Espressif: ESP8266, ESP12, ESP32, ESP32-S3, ESP32-C3 - AVR & 8051 families (Atmel, Intel, Nuvoton) - Cypress BLE PSoCs and Dialog Semiconductor DA145xx series 🔹 Development Platforms & SBCs - Arduino (Uno, Nano) - STM32 Nucleo & Discovery - TI LaunchPad - Raspberry Pi, Banana Pi, BeagleBone Black 🔹 Hardware & Peripheral Integration - RFID and biometric (fingerprint) modules - RF modules: Wi-Fi, BLE, Zigbee, Nordic, Silicon Labs - Camera modules (OmniVision) - Displays: LCD, TFT, OLED, GLCD, LED - External storage: SD cards, memory ICs - IoT and wireless communication modules 🔹 Software, Tools & Simulation - IDEs: Keil, STM32CubeIDE, Visual Studio Code - PCB Design: Altium Designer, KiCad, Eagle, EasyEDA - Simulation & Modeling: MATLAB/Simulink, Proteus, Multisim, Logisim - IoT Platforms: Blynk, Arduino Cloud, Adafruit IO, ThingsBoard 🔹 Wireless & Networking - Wi-Fi, BLE, Zigbee, LoRa - MQTT, HTTP/HTTPS - TCP/IP, FTP, RTSP - Selected Projects - STM32-based Automatic Street Lighting System - Gesture-Controlled Robot using ATmega32 - Smart Touchless Trash Bin - Industrial IoT Gateway (NodeMCU) - Battery Management System (BMS) using STM32 - ESP32 Motor Driver PCB - Custom Power Supply and RF Module PCB Designs Why Work With Me? ✔️ Consistent, on-time delivery with production-quality results ✔️ Cost-effective solutions without sacrificing reliability ✔️ Strong communication and long-term project support ✔️ Client satisfaction is always the top priority Thank you !

🎯 𝗪𝗼𝗿𝗸𝗲𝗱 𝘄𝗶𝘁𝗵 𝗠𝗲𝗿𝗰𝗲𝗱𝗲𝘀-𝗕𝗲𝗻𝘇, 𝗣𝗼𝗿𝘀𝗰𝗵𝗲, 𝗧𝗼𝘆𝗼𝘁𝗮 & 𝗙𝗼𝗿𝗱. 🇩🇪 𝗚𝗲𝗿𝗺𝗮𝗻 𝘄𝗼𝗿𝗸 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱 𝗼𝗻-𝘁𝗶𝗺𝗲 𝗲𝘃𝗲𝗿𝘆-𝘁𝗶𝗺𝗲 🤝 𝗖𝗼𝗺𝗽𝗲𝘁𝗶𝘁𝗶𝘃𝗲 𝗽𝗿𝗶𝗰𝗶𝗻𝗴. ✅ 𝟭𝟭+ 𝘆𝗲𝗮𝗿𝘀 𝗽𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲. 𝟮𝟬𝟬+ 𝗽𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝗱𝗲𝗹𝗶𝘃𝗲𝗿𝗲𝗱. 🇺🇸 𝗨𝗦 & 🇪🇺 𝗘𝘂𝗿 𝘀𝘁𝗮𝗿𝘁𝘂𝗽 𝗰𝗹𝗶𝗲𝗻𝘁 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘇𝗮𝘁𝗶𝗼𝗻. ☑️ <𝟴 𝗵𝗼𝘂𝗿 𝗿𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝘁𝗶𝗺𝗲𝘀, 𝟳 𝗱𝗮𝘆𝘀 𝗮 𝘄𝗲𝗲𝗸. 🛠 𝟮-𝗺𝗼𝗻𝘁𝗵 𝘀𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗯𝘂𝗴 𝘄𝗮𝗿𝗿𝗮𝗻𝘁𝘆 𝗼𝗻 𝘄𝗼𝗿𝗸. 🥋 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗟𝗲𝗮𝗻 𝗦𝗶𝘅 𝗦𝗶𝗴𝗺𝗮 𝗕𝗹𝗮𝗰𝗸 𝗕𝗲𝗹𝘁 (𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘄𝗶𝗹𝗹 𝗯𝗲 𝗺𝗮𝗻𝗮𝗴𝗲𝗱 𝗲𝘅𝗰𝗲𝗽𝘁𝗶𝗼𝗻𝗮𝗹𝗹𝘆 𝘀𝗺𝗼𝗼𝘁𝗵𝗹𝘆) Hi, I’m Muhammad! You can think of me as your go-to expert to design and develop the firmware and software for all types of hardware devices and products. I cover both on-device needs and their matching companion apps on desktop and mobile. Beyond the software, I work in person with a small, talented team that can support every aspect of hardware development and mechanical design as well. When you work with me, you get a one-stop shop for bringing your product to market. 📞 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮𝗻 𝗲𝗮𝗿𝗻𝗲𝘀𝘁𝗹𝘆 𝗵𝗲𝗹𝗽𝗳𝘂𝗹 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼 𝗰𝗵𝗮𝘁 𝗮𝗯𝗼𝘂𝘁 𝗯𝗿𝗶𝗻𝗴𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗹𝗶𝗳𝗲. ⭐️⭐️⭐️⭐️⭐️ ❝ Muhammad and his team did an absolutely fantastic job. They are the real deal. Not only did they complete everything I asked for to build me a very complicated machine, they constantly added in their own innovations and modifications to improve the performance of the device. It was extremely easy to work with them, and they are extremely professional and true experts in their fields. I proposed many changes during the development of the product, and they were able to accommodate my requests and provide valuable insight if changes weren’t needed or were too costly. They are backed by an engineering firm with specialists in so many fields, so we never needed to outsource work to an outside firm. Their firm felt like a one-stop shop that had all the resources needed to build a complicated mechanical product. I really could not imagine that many other engineer freelancers would have access to the resources needed to build my machine, so I am very grateful I found Muhammad instead of wasting my time and money with other freelancers. Do not hesitate to hire him. ❞ 🗣𝙏𝙖𝙣𝙫𝙞𝙧 𝙆𝙖𝙗𝙞𝙧 - 𝘾𝙀𝙊 - 𝘼𝙪𝙩𝙤𝙈𝙚𝙖𝙡 𝘿𝙮𝙣𝙖𝙢𝙞𝙘𝙨 Highlights of the software skills I support my clients with include: ☑️ Hardware Device Firmware Development - ☑️ Software Development - Software Architecture Design ☑️ Desktop App Development - Desktop Software Development ☑️ Printed Circuit Boards - PCB - Circuit Design - Altium - KiCAD - Eagle ☑️ Controllers - Raspberry Pi - Nordic (NRF) - Espressif - ESP32 - ESP8266 - STM - NXP - TI - Nvidia Jetson ☑️ Programmable Circuit Boards - Microcontroller Projects - Integrated Development Environment (IDE) ☑️ Electronic Design Automation - EDA - Eagle ☑️ Mobile App Development For Hardware Devices - Flutter (Hybrid) - Swift (Apple iOS) - Java/Kotlin (Android) ☑️ IoT Development ☑️ Embedded Systems - Embedded Engineering - C - C++ - Python - Rust - RTOS - Zephyr ☑️ Web Technologies - HTML5 - JavaScript - Node.js - RESTful APIs - PyQt ☑️ Tools & IDEs - Visual Studio - STM32CubeIDE - Eclipse - Keil Product Examples I’ve Worked On Include: 🔹 Consumer Electronics - Headphones - Smartwatches 🔹 Kitchen Appliances 🔹 Medical & Health - Medical Devices 🔹 Vending Machines - Retail 🔹 Automotive Tech 🔹 IoT - Internet of Things 🔹 Gadgets 📞 𝗜𝗻𝘃𝗶𝘁𝗲 𝗺𝗲 𝘁𝗼 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗼𝗻 𝗨𝗽𝘄𝗼𝗿𝗸 𝗼𝗿 𝘀𝗲𝗻𝗱 𝗺𝗲 𝗮 𝗱𝗶𝗿𝗲𝗰𝘁 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝘁𝗼 𝗯𝗼𝗼𝗸 𝗮𝗻 𝗲𝗮𝗿𝗻𝗲𝘀𝘁𝗹𝘆 𝗵𝗲𝗹𝗽𝗳𝘂𝗹 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻 𝗰𝗮𝗹𝗹 𝘁𝗼 𝗰𝗵𝗮𝘁 𝗮𝗯𝗼𝘂𝘁 𝗯𝗿𝗶𝗻𝗴𝗶𝗻𝗴 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝘁𝗼 𝗹𝗶𝗳𝗲. Thanks for taking the time to learn a bit more about me. Look forward to supporting you with your product soon! Muhammad Usman Sardar ⭐️⭐️⭐️⭐️⭐️ ❝ Working with Muhammad has been an absolute pleasure! He is incredibly skilled, reliable, and went above and beyond to deliver high-quality work on time. He communicated clearly throughout the project, understood the requirements perfectly, and handled every challenge with professionalism and a positive attitude. The end result exceeded expectations, and I’m truly grateful for his contribution. I highly recommend Muhammad to anyone looking for a talented and trustworthy developer. ❞ 🗣 𝘾𝙝𝙡𝙤𝙚 𝙑𝙞𝙡𝙙𝙚 - 𝘾𝙀𝙊 - 𝙏𝙚𝙙 & 𝘾𝙤.

I’m Hamza a Biomedical Engineer with a passion for Embedded Systems, IoT, Electronics, and Robotics. I turn ideas into real, working prototypes and products. Whether it’s designing smart devices, building automation systems, or creating medical technology, I bring innovation to life. What I Do Best: Embedded Systems & IoT Experience with ESP32, NRF52, ATMEL, STM32, PSOC, PIC Work with Raspberry Pi, VisionFive (Linux Board), and Unihiker Programming Proficient in C/C++, Python, Java, MATLAB, JavaScript, and Flutter Connectivity & Communication Skilled in UART, I2C, SPI, MQTT, BLE, BLE Mesh, Sigfox, and Wi-Fi Hardware Design & Prototyping Specialize in PCB Design, 3D Modeling, and Product Prototyping GUI Development Develop Touchscreen Interfaces, E-Paper & TFT Displays, Web Dashboards, and Desktop Applications Work with LVGL, Tkinter, PyQt, and Kivy Framework IoT & Cloud Integration Experienced with AWS IoT, Firebase, ThingsBoard, and WebSocket-based real-time control Industrial IoT (IIoT) Expertise in CAN Communication, Factory Automation, and Smart Sensor Networks Remote Monitoring & OTA Updates Work with ESP-IDF OTA, BLE DFU, and Cloud-Based Device Management I’ve built industrial prototypes, smart sensors, automation systems, and medical devices, real-time data processing and device connectivity. If you need a reliable, high-quality solution, let’s make it happen! Let’s Collaborate!

🏆 Top Rated Product Developer ( I've developed my own products || I'm now helping others on the Upwork platform ) 🏠 I have a Small Home Laboratory to develop/debug prototype boards for your product 💭 I'm a native English speaker My name is Stephen, and I have 25+ years in product development, including 13 years at Microchip in roles like Test Engineer, Design Engineer, Silicon Validation, and Applications Engineer. My clients communicate directly with me - I don't use any AI chatbots as intermediaries. I specialize in developing products from concept to working systems. I can handle both hardware and software or work flexibly on specific areas like architecture and hardware design. I’ve developed two successful products: (1) KEYKatcher hardware keylogger – A device plugged into a PS/2 keyboard port to record and play keystrokes. It was popular among parents for monitoring children's computer use, with tens of thousands sold. Sales declined as PS/2 ports became obsolete (2) TightWatt pool timer – An intelligent controller for swimming pool motors, featuring a year-round algorithm. It was awarded a patent and gained national distribution. Through all the product development, I’ve created a system for planning and designing working products. This system reduces costs ( by reducing mistakes ). I frequently make product improvements in 1️⃣ Lowering energy usage: important in battery-powered products 2️⃣ Increasing performance: increasing sample rates or changing communications protocols 3️⃣ Lowering product cost: making full use of the microcontroller peripherals to reduce external components I have completed more than 70 projects on Upwork but to check my capabilities or skills, you can check out the following projects: ➡️ Hardware Prototype Design for Plant Monitor Product using ESP-32 ➡️ Microchip ATtiny202 Code Development ➡️ Energy Storage Monitoring System ➡️ BM83 Bluetooth Application Schematic ➡️ Embedded System with PIC Microcontroller & Accelerometer ➡️ PCB Power Usage Optimization ➡️ TI MSP430 Development Additional Skills: ➕ Leading-edge technologies such as USB/USB-C, Lithium Battery Charging, LED and Color Mixing, I2S Digital Audio, and Analog Measurements ➕ Common Communication Busses: USB, RS-232, RS-485, CAN, I2C, SPI, Infrared ( with carrier ) As mentioned above, I have a small home laboratory where I have all the tools I need to develop/debug prototype boards for your product. This includes: ⚙️ Multiple programmers for Microchip, Atmel, and TI parts ⚙️ Logic analyzers to quickly find issues with communication busses such as I2C, SPI, UART, I2S, …. ⚙️ A “power profiler” with picoAmp range ( yes, picoAmp, a trillionth of an Ampere ) for power optimization of low-power products ⚙️ A reflow oven for assembling prototype PCBs ⚙️ Inspection equipment for verifying PCB assembly ⚙️ A fellow Upwork contractor is available to do the physical assembly work. She works at a much lower rate than me and has the patience to hand-populate / hand-solder prototype boards Some electronic inventory is on hand. I may have all the components in-house to complete your project Feel free to contact me through UpWork. Best Regards, Stephen

I'm an experienced PCB Designer and Firmware developer with a strong background in Embedded Systems , PCB Design and manufacturing. With over 3 years of expertise, ✅ PCB DESIGN SERVICES: • Expertise in PCB layout/design for up to 8 layers, offering cost-effective and space-saving solutions. • Skill in creating custom schematics, footprints, symbols, and libraries from scratch. • Proficiency in board design, including the creation of 3D models of PCBs in CAD and PDF formats. • Experienced in firmware development and programming. • Preparation of Gerber files for production, with a focus on selecting components, creating a bill of materials (BOM), and preparing comprehensive manufacturing documentation. ✅ FIRMWARE DEVELOPMENT: • I develop custom firmware for various platforms such as FPGA, MCU, SoCs, ARM, NXP, PIC, Arduino, and Atmel. • I specialize in programming for Bluetooth Low Energy (BLE) and other wireless technologies. ✅ PRODUCT DEVELOPMENT: • I use SolidWorks for mechanical design, including 3D modeling and mold designs. • I also design product enclosures. ✅ SPECIALIZATIONS: FOR ELECTRIC VEHICLES: • I design Battery Management Systems . ✅ FOR INDUSTRIAL/REMOTE CONTROL APPLICATIONS: • I create microcontroller-based designs for robotics, automation, power systems, VFDs, and instrumentation. • I have expertise in communication technologies like WiFi, TX/RX, Bluetooth, BLE, GATT, and radio. ✅ SOFTWARE EXPERTISE: • I'm proficient in software like Altium Designer, Eagle PCB, KiCad, Proteus Design, and more. • I'm skilled in using SolidWorks and AutoCAD for mechanical designs. I understand and can design products to comply with UL Standards, ensuring safety and reliability. My commitment is to provide high-quality, custom PCB designs that meet the specific needs of each client, using the latest software and adhering to the highest industry standards

With over 15 years of hands-on experience in embedded systems engineering, I specialize in designing, developing, and delivering robust embedded solutions with a strong focus on code quality, reliability, and long-term maintainability. My background includes end-to-end embedded product development—from concept and architecture to firmware, hardware, testing, and production support. I have collaborated with Silicon Valley teams, including former Apple engineers, which has shaped my engineering discipline, documentation standards, and commitment to building scalable, high-performance systems. 🔧 Core Expertise ⚙️ Firmware Architecture & Development Skilled in architecting clean, modular, reusable, and well-documented firmware. Strong focus on MISRA-C compliance, static analysis, RTOS-based designs (FreeRTOS, Zephyr), and bare-metal development. Experienced in building robust driver layers, HAL, bootloaders, communication stacks (SPI, I²C, UART, CAN, RS485), and secure OTA update mechanisms. 📡 IoT Systems & Connectivity Design and integration of IoT architectures including MQTT, BLE, Wi-Fi, LTE, and mesh networks. Experience with cloud platforms (AWS IoT, Azure IoT, Google Cloud) and secure device provisioning. Development of low-power, battery-optimized embedded IoT devices. 🔌 Power Electronics & Control Systems Development of control algorithms for inverters, motor control (FOC, BLDC, PMSM), PFC stages, and DC-DC converters. Firmware for Battery Management Systems (BMS) including cell balancing, SOC/ SOH estimation, and safety protection layers. High-reliability firmware design for power and industrial electronics. 🔲 PCB Design & Hardware Engineering Schematic capture, PCB layout (1–6+ layers), signal integrity optimization, EMC/EMI-aware design. Experience with Altium Designer, KiCad, and Eagle. Ability to take a design from concept → prototype → production. 🧠 Microcontroller & SoC Platforms Extensive experience across multiple architectures and ecosystems, including: ARM Cortex-M Series (M3, M4, M7) ESP32 / ESP8266 Nordic NRF52 Series (BLE applications) TI C2000 / TI Stellaris Microchip PIC32 NXP Kinetis / LPC STM32 Family (all major series) 🌍 Why Work With Me? 15+ years crafting reliable embedded solutions. Proven ability to work with global engineering teams and Silicon Valley standards. Strong communicator with clear project documentation and milestone planning. Passionate about designing high-quality firmware, efficient hardware, and full stack embedded systems. Committed to delivering results that work in real-world conditions—not just in the lab. If you’re looking for an experienced embedded engineer who can take your idea, prototype, or existing product to the next level, I’d be happy to discuss your project. Let’s build something exceptional.