Hire the Best Computer Hardware Engineers

Over 4700 hour worked in Upwork TOP rated 14 Years Practical Experienced on - **Research and Development *Micro Controller Hardware & Software *Android App Developer *Embedded Systems Design and Solution *PCB Design/Pcb - Eagle Cad PCB Design ,eagle ,Designspark ,1-6 Layer PCB *Atmel,Arduino,Attiny ,PIC 16F,PIC 18F,ARM (STM 32F),M0-M4 *Electronics Design,Circuit Design,Schematic Design , *Power Electronics *Wireless Technology *IOT *ESP32,ESP8266 **Raspberry PI *Bluetooth ,GSM,WIFI,IR Remote,Transformer Design *Bio Medical Technology (X - Ray Viewer ,Photo Therapy,Pressure ,Heart Rate & SPO2 Measurement ) *RFID ,Buck &Boost ,Touch Display,Low Cost Technology,GPS System *Dot Matrix ,RGB,LED Dimmer , Fingure Print ,Temparature & Humidity *3 Phase Fault & Auto changer ,Motor (DC,Servo,Stepper ,BLDC ) Driver *Solar Battery Storage ,ZigBee Communication ,RF Technology,DC to DC Converter *MOSFET ,Transistor ,Relay Driver ,Frequency Generator (Varaible) *Lipo Battery Charging ,SLA Battery Charging *WS2812 RGB LED DRIVER AND DESIGN *Power Supply Design *oled display,PWM,LCD Display *Prototype Design ,Assembling ,SMD Technology *AI,Machine learning *EV charger , OCPP protocol ,PLCC *Test & Debug

Hello! I’m Ben, a hardware and firmware expert with 8+ years of experience in designing hardware, programming embedded systems, and developing high-performance software solutions. My goal is to provide innovative, reliable, and high-performance solutions that meet your needs. With a strong track record on Fiverr (Level 2, 5 stars) and Upwork (Top Rated Plus, 5 stars), I have successfully delivered top-tier service to over 100 clients. What I Offer 1. End-to-End Embedded & Hardware Solutions - Advanced PCB Design & Hardware Development: Expertise in schematic capture, PCB layout, and multi-layer board design for reliable, high-performance, and manufacturable products. Experienced with KiCad, Altium, OrCAD, and Eagle. - High-Speed Design: Strong experience in 1–12 layer PCBs, including DDR3/DDR4/LDDR4, PCIe, USB (2.0/3.0/3.1/3.2), HDMI and 10/100/1000/10Gbase-T1 Ethernet. - Microcontrollers & SoMs: Firmware and hardware development for ARM Cortex-M3/M4 (STM32, ESP32, Nordic nRF52/53/91 series); custom boards for Raspberry Pi CM4/CM5, Orange Pi, iMX8, Jetson Nano/Xavier/Orin, RK3588, RK3568, RV1126, Allwinner, Zynq-7010. - Power & Hardware Integration: Experience in DC-DC, AC-DC, Buck, Boost, and Flyback converters, along with hardware design involving audio, RF modules, PA, LCD, filters, RFID, touch screens, and LVGL-based interfaces. - Prototype, Testing & Validation: Full support for board bring-up, debugging, validation planning, and functional testing to ensure hardware works reliably in real-world applications. - Manufacturing & Prototyping Support: Preparation of BOM, Gerber, and manufacturing-ready files, with hands-on support for prototype production and manufacturing through JLCPCB and PCBWAY. 2. Robust Firmware Development - Languages & Development: Strong embedded firmware development in C/C++, Python with experience using Visual Studio Code, STM32CubeIDE, Arduino IDE, ESP-IDF, and Segger. - Communication Protocols: Proficient in USB, UART, I2C, SPI, I2S, RS232, and RS485, enabling reliable communication across embedded systems and connected devices. - Wireless & Connected Systems: Experience with BLE, BLE Mesh, ZigBee, UWB, LoRa, NB-IoT, 4G LTE, Wifi, WiFi Mesh, and NFC for IoT and wireless product development. - Sensor: light sensor, CO, Smoke Sensor, Dust Sensor, Air Sensor, pH sensor, IMU sensor, Accelero, Gyro sensor,... - UI/UX for Embedded: Figma, TouchGFX, LVGL for STM32, ESP32, Raspberry Pi. - Motors Control: BLDC, Stepper, Servo, DC Motors - Robotics: Expertise in ROS/ROS2 for applications like AGV, AMR, 6-axis robots. Some of my product that I have designed and released to the market: - Home IP Camera: SoC-based design with DDR3 RAM, Ethernet/Wi-Fi streaming, CMOS image sensor, IR LED array, IR-cut control, USB, and MicroSD - Smart Home Products: Home Gateway with Ethernet, Wi-Fi, Zigbee, and TFT LCD; Smart Switch with capacitive touch, Zigbee, power metering, and AC load control - Tablet Mainboard: RK3399-based board with DDR3, eMMC, touch screen, LTE. - Smart Water Meter: BLE/Wi-Fi design with TI MCU. - Wearable Devices: Low-power wearable designs with wireless connectivity, sensors, and battery management - High-Performance ESC for Drones: Real-time motor control design for efficient and stable drone operation - Custom SBC with AI Module: Raspberry Pi-based SBC solutions with integrated AI capabilities And a lot of other products. With our experience and expertise, I’m confident I can provide tailored solutions to help you complete your project and release your product to the market . I look forward to the opportunity to work with 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.

Luka Knežević – Hardware Engineer & PCB Designer I am a highly experienced Hardware Developer and PCB Designer with over 5 years of professional engineering experience and more than 50 successfully completed projects ranging from low-power embedded systems to multi-kilowatt power electronics. My background spans high-performance LED drivers, motor control, energy systems, wearable devices, medical devices, NFC solutions, industrial controllers, and advanced multi-layer PCB design. I have deep experience in designing reliable, production-ready hardware using modern MCUs (ESP32, STM32, PIC, TI, C2000, Spartan 7 (AMD)), high-power topologies, battery systems, and a wide range of communication protocols. My lab is fully equipped for prototyping, testing, and validation, including oscilloscope work, precision measurements, firmware bring-up, and full board bring-up. ________________________________________ Professional Background • 5+ years of hardware engineering experience • 50+ completed projects, including: o Buck, boost, flyback, and PFC buck converters o BMS systems (1–16 cells) o E-bike inverter, motor control boards, motor drivers o E-bike chargers and high-efficiency power supplies o Nanosatellite power supply modules o Wearable devices (ultra low power + haptics + sensors) o Medical devices (Class A/B prototyping) o Industrial control cards (TI, ESP32, STM32, C2000, Spartan 7 (AMD)) o Wireless systems (BLE, Wi-Fi, LoRa, NFC) o Toys and consumer electronics o Rigid and rigid flex PCBs (2–16 layers) o Screen sterilization system controllers I have designed boards ranging from 1 to 16 layers, including rigid flex adapters, ultra compact wearable PCBs, motor control boards, high voltage/current power stages (up to 3 kW), and RF capable layouts. ________________________________________ Technical Expertise Hardware & Power Electronics • Topology selection: buck, boost, flyback, SEPIC, PFC buck, forward, synchronous drivers • Wide range power design up to 3 kW, switching frequencies up to 200 kHz • Battery systems: BMS, balancing, charging, MOSFET drivers • Motor control drivers (BLDC, brushed DC, E bike) PCB Design • Professional PCB layout using: o Altium Designer (primary) o KiCad, OrCAD, PCAD, EasyEDA • High density, mixed signal, high current, HV, and EMC safe design • Rigid flex, flex adapters, microcontroller modules, RF layouts • Full DFM/DFT optimization for production Communication Protocols • CAN, I²C, SPI, UART, RS485 • Bluetooth, Wi Fi, BLE Mesh, ESP NOW, LoRa • Ethernet LWIP, NFC, custom short-range communication Software & Simulation • MATLAB, Simulink, PSpice • LTspice, TINA, Altium simulations • Firmware bring up (ESP-IDF, STM32 HAL, Arduino) Prototyping & Testing • Soldering, rework, fault analysis • Gate driver tuning, feedback loop stabilization • Load testing, thermal evaluation, EMC preparation ________________________________________ Achievements • 1st Place – IFEC 2019 (E-bike drive) • 2nd Place – IFEC 2020 (Nanosatellite power supply) — Team Leader & Hardware Lead • Former CTO of a hardware startup (2 years) • Project Manager for solar power plant automation (1 year) • Over 50 projects and 1300+ billable hours on Upwork ________________________________________ Notable Project Types • Screen sterilization controllers (UV / chemical) • Wearable devices (IMU + LRA haptics + battery optimization) • Medical device prototyping • Power supplies (industrial, consumer, nanosatellite grade) • Custom rigid flex boards & adapters • NFC-triggered activation devices • Motor control & drive boards ________________________________________ Let’s Work Together Best regards, Luka Knežević

Passionate about designing Embedded devices, power electronics, battery operated systems, Raspberry Pi HATs, Arduino Shields. I turn your ideas into market ready products. Expertise in KiCAD, Eagle, Altium and EasyEDA. I have fully functional electronics lab where I offer prototype testing services. I can manage production runs from any PCB manufacturer. On firmware side, I can program in Arduino IDE, stm32Cube IDE and others... With customer satisfaction a priority. I let my work profile speak for myself. Proudly boost my top rated status and 100% happy clients...

I’m a senior Japanese Mechanical & Electronics Engineer. I help people turn ideas into real working products, from early concept to prototype and manufacturing-ready files. My work covers both the electronics side and the mechanical side, so I can help when a product needs a PCB, enclosure, structure, wiring, assembly design, or full product development. I like working on practical designs that are easy to build, easy to test, and ready for real use. On the electronics side, I can help with: - PCB design and layout - Schematic design - Circuit review and troubleshooting - Power supply circuits - Sensor and control circuits - Microcontroller-based systems - Wiring diagrams - BOM preparation - Gerber files and manufacturing files On the mechanical side, I can help with: - 3D CAD design - Product enclosure design - Mechanical parts and assemblies - Sheet metal or plastic part design - Prototype design - Design for manufacturing - 2D technical drawings - Assembly drawings - Mechanical improvements for existing products I can also help review an existing design and find problems before manufacturing. Many small issues in PCB layout, enclosure clearance, mounting holes, wiring, heat, or assembly can become expensive later. I try to catch those problems early and keep the design simple and reliable. My usual goal is not just to make something look good on screen. I focus on whether the product can actually be made, assembled, tested, and used properly. I care about clear communication, clean files, and practical engineering decisions. I can support you with: - New product development - Prototype improvement - PCB and enclosure matching - CAD model changes - Manufacturing file preparation - Product redesign - Technical drawings - Engineering consultation I’m comfortable working with clients who have only a rough idea, a sketch, an old design, or a product that needs fixing. You can explain the problem in simple words, and I’ll help turn it into a clear engineering plan. Before starting, I usually like to understand: - What the product should do - How it will be used - Size or space limits - Power requirements - Manufacturing method - Any current problem in the design This helps me give better suggestions and avoid unnecessary work. If you need someone who can think about both electronics and mechanical design together, I’d be happy to help.