"Sergey is knowledgeable of electronics principles and able to complete electronics design." "Excellent to work with." "Outstanding work. You can trust this guy. Will hire again." "Sergey has a lot of knowledge with PCB designs and is a valuable asset to any team." I provide high-quality full cycle Electrical Engineering services from Idea to Mass Production: Hardware, Firmware, Product Design, Prototyping, Manufacturing. HARDWARE: - PCB design: Altium, Eagle. Experience in Digital, Analog, Power electronics, Digital Signal Processing. - 6-12 layers PCB layout, HDI routing, dense routing, thermal management. - Gigabit Ethernet and USB-C. High-speed routing with length matching; impedance calculations. - Component selection, BOM optimisation, preparation of manufacturing documentation. - High current PCB routing up to 200A - EMC reduction, EMC problem fixing FIRMWARE: - MCU firmware in C for ARM, TI, NXP, Atmel, PIC, Arduino; Python; - Bluetooth, Bluetooth Low Energy (BLE), and wireless modules programming. PROTOTYPING: - PCB Prototype manufacturing, debugging, and validation; - Consultation on any aspect of design and manufacturing. MANUFACTURING - BOM optimization to save cost / get better components availability - Creating test instructions, work instructions, test jigs - Organization of contract manufacturing in China I HAVE EXPERIENCE IN: - IoT projects, sensors, wearable electronics, Smart-home systems; - Automotive and Climate control equipment. I developed hardware equipment for autonomous driving systems. - High current high power electronics (BLDC drivers, frequency converters, battery chargers, battery balancers, inverters, power banks, home power storage systems) - High voltage power supplies up to 20 kV - Energy harvesting (solar, piezo, thermal) - Digital signal processing, audio signal processing, Sigma Studio - Solar trackers - Video recording systems for commercial delivery fleet - Wearable projects with tiny flex rigid pcbs AUDIO: - Analog signal processing, High End audio amplifiers - Room acoustic treatment consultations - ANC earbuds and headphones development INDUSTRIAL: - High-reliability systems for critical applications (Robotics, Oil and Gas, Automation); - Micro-controller control systems; - Power Supplies (AC/DC/AC) - AC, DC, BLDC, Step motors, robotics MEDICAL: - ECG, EMG, PPG, SpO2 sensors - Blood pressure monitoring - Respiration rate monitoring - Limbs position monitoring WIRELESS: - GPS, GNSS, telematics - Bluetooth and BLE-enabled devices; - 2.4Ghz radio transmitters (nRF24 family); - NFC tags: hacking, cloning; - Wireless charging Tags: Electrical Engineer, Electrical Engineering, Electronics, Hardware, Firmware, PCB layout, Board layout, Schematics, Altium, IoT, Internet of Things, Power Electronis, Bluetooth, BLE, TI, Texas Instruments, C, C++, MCU, Microcontroller, prototype, validation, BMS, Fusion360, USB-C, Jetson Orin, Jetson Xavier, STM32, GNSS, GPS

I have strong background on applied mathematics, mathematical modelling, and digital implementation of numerical algorithms. My experience inclines to differential equations, control system, estimation theory, and robotics in general.

Do you need help with your next hardware project ? Here is what I can do for you: *Hardware & PCB design: -From simple MCU boards with sensors and actuators to complex circuits containing RF blocks, CPUs, SoCs, FPGAs, PMICs and DDRx memory. -High-speed digital design and routing (Ethernet, HDMI, USB, PCIe, LVDS, SATA, MIPI, CAN). -Power electronics: battery management systems and BLDC drivers. -Signal integrity, power integrity, DFM, EMC and thermal considerations. *What you can expect -Clear and consistent communication. -Professional documentation and organized schematics. -Fast, reliable turnaround. -Support from idea - block diagram - schematics - PCB layout - Fabrication My hourly rate is flexible, it depends on your project's complexity and the level of support required. If this sounds good to you, feel free to send me a message so we can discuss more details. I am looking forward to working with you. Kamal

I am a professional in hardware design, communication systems and microwave engineering, a field I'm passionate about, with a master's degree in electrical engineering and +2 years of experience. ➢ I have competences in : - RF Fundamentals, Basic Concepts and Components - PCB Design (Hardware & Firmware) - Radio propagation, concepts of cellular technology - Design of RF/microwave components (Analyze, Understand, Simulate, Measure) - The architecture of front-end Transceivers (Filters, Diplexers, Antennas...). - Radio-Frequency Identification (FRID) ➢ I have experience with : - ADS (Keysight) - CST-Studio, HFSS. - Kicad, Altium, EasyEDA, Proteus • Programming: C++, VHDL, Java, MATLAB.

✅ Hardware Designer | ✅ Embedded & Firmware Developer | ✅ Software Engineer I'm an experienced electronic engineer with over 14 years of expertise in hardware and software design. My key strengths include: - PCB Design - Circuit Design - Firmware Development for STM8 & STM32 Whether you need a custom PCB layout, a sophisticated circuit, or reliable firmware, I’m here to deliver innovative solutions that meet your needs. Core Skills: - Programming: C, C++, Python, PyQt, Bash - Tools: KiCAD, Altium Designer, LtSpice, IAR, STVD + COSMIC, Keil, Postman, Wireshark, PyCharm, MySQL Workbench, Visual Studio, Eclipse, Git Extended Experience In my most recent project, I utilized: - Project Management Tools: Jira, Confluence, Bitbucket - Embedded Software: C, C++, Python, Embedded Linux, MariaDB, Qt - PC Software: Python, PyQt - Cloud Technology: AWS, Python, MariaDB, Docker, JavaScript - PCB Design Tools: Altium Designer, KiCAD, LtSpice - Testing & Debugging: UL2524, Wireshark, Postman, MySQL Workbench, Oscilloscope, Digital Analyzer, Soldering Equipment Let's Work Together: With my broad skill set and attention to detail, I can turn complex engineering challenges into seamless, practical solutions. I’m excited to collaborate and bring your projects to life!

🅻🅾🅾🅺🅸🅽🅶 for new challenging projects which will allow me to keep growing and use my talents to the maximum. I am available for up to 30 hours bi-weekly. My fields of expertise are: • Communication: ZigBee, Bluetooth, CAN, RS485, I2C, RS232, SNMP, MODBUS, USB, DNP3, TCP/IP, 3G • Writing application for microcontrollers • Testing • Design system architecture: microcontroller + database + cloud + mobile app • Prototyping on single board computers like Raspberry Pi or BeagleBone • Bring to life custom prototype boards • Improve the code performance • Bug fixing • C / C++ code review • Writing PC utility program I can solve your problems fast, efficient not compromising the quality. Thank you for your time. P.J.

Hi, I'm Al Fahad — a passionate Full Stack Developer with over 5 years of hands-on experience in mobile app development, cross-platform architecture, and smart software systems. I come from an engineering background, currently pursuing my BSc in Electronics and Communication Engineering at KUET, and I’ve turned my love for coding, electronics, and design into a full-time professional journey. 🧰🧰 You can directly check my portfolio items, they are all real life projects and the reviews of all the works are also attached with them. All the people were very satisfied. Take a look without a delay. During the pandemic, I dived deep into Data Structures and Algorithms, building a strong foundation in core computer science concepts and problem solving. Since then, I've worked on countless personal projects to sharpen my skills, then moved on to freelance platforms where I delivered quality solutions and earned great client reviews. ⚙️ What I Do I specialize in cross-platform development across mobile, web, and desktop — ensuring smooth, high-performance user experiences, scalable backends, and efficient system automation. Whether it's a business app, a startup prototype, or an embedded IoT system — I bring both technical depth and creative thinking to the table. 🧠 My Core Skills 🔹 Mobile & Frontend Development: Flutter, React Native, Jetpack Compose Win32 API, .NET, Custom UI systems 🔹 Backend Development: Node.js, Django, Flask Firebase, REST APIs, Websockets 🔹 System & Automation: Linux system administration (Ubuntu, Debian) Advanced scripting and automation in Python Bash scripting, DevOps fundamentals, Docker 🔹 UI/UX & Design: Figma, Penpot, Adobe Illustrator, Photoshop Clean, modern, and responsive interface design 🔹 IoT & Embedded Systems: Arduino, Raspberry Pi, ESP32 Microcontroller programming, sensor integration 🔹 Others: WordPress site development Web scraping, task automation, OpenWRT router customizations 🧰 Notable Projects ✅ Flutter based Event Management app with advanced UI/UX and API integrations ✅ Cross-platform Location Tracking app using React Native + Node.js + Firebase full stack ✅ Automation script in Python for scraping and data processing ✅ OpenWRT-based custom router system testbed development ✅ Branding and logo design for a martial arts company 🌟 Why Work With Me? ✅ Deep Technical Knowledge: I don't just "make it work" — I understand the how and why behind the code. ✅ Full Stack Confidence: I can build your entire system from frontend to backend to deployment. ✅ Passionate and Self-Motivated: I truly love what I do, and it shows in my work and dedication. ✅ Great Communication & Freelance Experience: You’ll find me reliable, easy to collaborate with, and open to feedback. ✅ Try Before You Hire: I’m confident in my skills — feel free to send a small task to test me before committing. 🎯 Let’s Build Something Great If you're looking for a reliable full stack engineer who can confidently deliver across mobile, web, desktop, and IoT — you’re in the right place. I’m open to both short- and long-term projects, and always excited to bring new ideas to life. Feel free to reach out — I’d love to learn about your project and see how I can help!

Experience: 🔹 I have been specializing in RF & Microwave Antennas for the past 2 years, working on a range of projects that involve designing, simulating, and optimizing antenna systems. Education: 🔹 BTech in Electronics and Communication 🔹 Master's in Communication and Signal Processing Technical Skills: 🔹 Expertise in Software Tools: CST Microwave Studio Suite (3D EM Simulation) Advanced Design System (ADS) High Frequency Structure Simulation (HFSS) AWR Microwave Office Altium Designer MATLAB, Multisim, Proteus Programming in C, Python, and C++ Area Expertise: 🔹 Antennas: Single Element Antennas Array Antennas (including MIMO for 5G/6G) Phased Antenna Arrays mmWave & THz Antennas Wideband Arrays and Dual Polarized Arrays Antennas for Medical Applications Low-Cost Commercial Antennas 🔹 RF Circuits & Components: RF Circuit Design Antenna Matching Circuits Amplifiers and Filters Power Dividers and Feed Networks 🔹 Advanced Topics: Beamforming MIMO and Metamaterial Phased Arrays Array Signal Processing I am committed to leveraging my academic background and hands-on experience to deliver high-quality solutions and tackle complex challenges in the RF and microwave domain.

I am a robotics software engineer with expertise in ROS, SLAM, autonomous navigation, and path planning. I have developed software for autonomous robots, integrating sensor fusion (LiDAR, IMU, encoders) and motion planning algorithms like A* and DWA. In addition to robotics, I bring skills in control systems, PCB design (KiCad), and CAD modeling for mechanical prototyping. My experience includes working on complex projects like a solar panel cleaning robot, robotic arm simulations, and parallel manipulators. I’m passionate about delivering innovative and reliable solutions tailored to your needs. Let’s work together to make your vision a reality!

My expertise is developing firmware for STM32WL55 in C/C++, leveraging both cores (Cortex-M4 and M0+) to achieve a high performance output and maintaining ultra low power consumption. Share your project goals and I provide you the right solution how to get there.