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Hello, Everyone! I am an embedded systems engineer, PCB designer, and firmware developer with over 10 years of professional experience. I provide complete, end-to-end solutions for a wide range of electronic device designs, supporting clients from initial concept and schematic design to PCB layout, prototyping, assembly, and full system testing. I have strong expertise in high-speed PCB design, including PCIe and DDR4 routing, as well as precise impedance matching for reliable performance at high frequencies. I also specialize in RF and antenna design for modern IoT devices, ensuring optimal signal integrity and system efficiency. In addition, I have deep experience in ultra-low power design, achieving microamp and sub-microamp current consumption for battery-operated and wearable systems. I specialize in firmware development for LTE-GPS-LoRa-BLE-based embedded systems (nRF52 series), including low-power optimization and high-precision sensor acquisition. My focus is on delivering robust, production-ready solutions with high reliability and performance. 🔥 Main Skills 👉Embedded Systems 👉Schematic Circuit Design(Low Power consumption Design) 👉Firmware Development(All Microcontrollers-STM32, TMS320, ESP32, FPGA, nRF52, Raspberry PI) 👉PCB Design(High speed signal routing, PCIe, DDR4, 18 multi-Layers Design, RF antenna Design,) using Altium Designer, KiCad, EasyEDA, Fusion 360(No problem in DFM-JLCPCB) 👉IoT with nRF52(BLE), LoRa(for example, SX1262), LTE(SIM card interface), GPS and other variety of sensors 🛠️Tools & Technologies: 👉 nRF5 SDK / nRF Connect SDK 👉SEGGER Embedded Studio + J-Link debugging 👉 C/C++ (bare-metal & RTOS) 👉 BLE GATT, LTE AT commanders, custom wireless protocols 👉SPI / I2C / UART / ADC integration 👉Low-noise measurement systems (nA level) 👉STM32CubeIDE, Cube MX, Keil, CCS, Arduino, ... 👉MQTT, Free RTOS, Zephyr RTOS 🚀 I can support your project from concept to production.

🎯 I'm a Mechatronics and Robotics Engineer who combines Mechanical Engineering, Electronic Engineering and Software Development to drive efficient end to end product/prototype development. My approach combines strong theoretical foundations with hands-on project experience, ensuring robust, efficient, and well-documented solutions are delivered. ☎️ Contact me for a ꜰʀᴇᴇ ᴠɪᴅᴇᴏ ᴄᴀʟʟ to discuss your project. Core Expertise: 🔵 Mechanical Engineering & CAD 🟣 Electronics & Custom PCB Design 🟠 Robotics & Mechatronics What Makes Me Different ✔️ Multi-disciplinary - mechanical + electronics + firmware as one system ✔️ UK Ltd with regulated PII insurance ✔️ Top Rated Plus, 100% JSS across 50 contracts ✔️ Discrete specialist work welcome I operate through H. Nanda Engineering Solutions Ltd, a UK-registered limited company. The company maintains UK-regulated professional indemnity insurance, providing clients with the reassurance that all projects are delivered with professionalism, accountability, and to a high standard 🔒 TOOLS, PLATFORMS & CAPABILITIES: Mechanical Engineering, CAD, Fusion 360, SolidWorks, enclosure design, mechanism design, sheet metal, DFM, DFA, 3D printing, injection-mould-ready parts, Electronics, Custom PCB Design, Schematic and layout, mixed-signal PCB, multilayer boards, sensor electronics, power electronics, motor driver circuits, EMC, KiCad, Altium Designer, Embedded Systems, Firmware, STM32, ESP32, Arduino, ARM Cortex, embedded C, C++, MicroPython, RTOS, BLE, Wi-Fi, LoRa, MQTT, CAN bus, I2C, SPI, UART, low-power design, OTA updates, Robotics, Mechatronics, ROS, ROS2, Gazebo, SLAM, Nav2, MoveIt, LiDAR, IMU, sensor fusion, computer vision, manipulator and gripper design, AGV, AMR, cobot integration, industrial automation, Industry 4.0, Control Systems, Simulation, MATLAB, Simulink, Unreal Engine, dynamic modelling, PID, LQR, state-space, MPC, motor control (BLDC, stepper, servo), digital twin, model-based design, IoT, Connected Hardware, End-to-end IoT product builds, telemetry, smart sensors, companion apps, web dashboards, edge devices on Raspberry Pi and NVIDIA Jetson, AI in Hardware, Edge AI on STM32 and Jetson, computer vision on devices, perception for robotics, TensorFlow, PyTorch, OpenCV.

I turn product ideas into working prototypes — electronics, PCB and firmware, delivered by one engineer so you don't have to coordinate separate hardware and software contractors. I'm a qualified electronics engineer with a second degree in software development and over 20 years' experience, specialising in proof-of-concept designs and one-off builds for startups, inventors and product companies. If you have a concept, a stuck project, or a design that needs taking from idea to something that physically works, that's my core work. What I do: • Circuit and PCB design — schematic capture, layout, BOM, manufacturer-ready files • Arduino, ESP32 and embedded systems • Firmware development in C/C++ • Low-power and battery-operated designs • Sensor, Bluetooth and Wi-Fi integration • Robotics and motor control • Reverse engineering and improving existing designs, EMC debugging • 3D-printed enclosures to complete the build How I work: I agree scope and components before starting, keep communication clear, move quickly, and tell you up front what's realistic. I've built a track record of clients returning for repeat projects because the work is fast and does what they need. To discuss a project, send me what you're trying to build and any constraints, and I'll outline how I'd approach it, the likely scope, and timing.

From concept to tested prototype, I design high-performance PCBs and embedded systems for startups, engineers, and product teams who need results that work the first time. With 8 years of experience in embedded systems and hardware design, I specialize in creating production-ready electronics that are efficient, reliable, and built for scale. Whether you're developing a new product or improving an existing design, I bring the technical expertise and problem-solving mindset to get it done right the first time. 💡 What I Offer: 🔹 Embedded System Development: ARM Cortex, STM32, ESP32 🔹 Advanced PCB Design: From 2-layer to complex multilayer boards with BGA, RF, and high-speed signals 🔹 Cost-Effective Engineering: Focused on value without compromising quality 🔹 Rapid Prototyping: Helping you move from idea to working prototype quickly 🔧 Core Technical Skills: ✔️ Analog & Power Circuit Design: LED drivers, SMPS, sensor interfacing ✔️ Motor Control & Drive Systems ✔️ Signal Integrity & EMC/EMI-Conscious Design ✔️ Communication Protocols: RS232, RS485, I2C, SPI, UART, CAN ✔️ Firmware Development: Embedded C/C++ for real-time applications 🛠️ Tools & Platforms I Work With: 👉 Altium Designer – Industry-standard PCB design 👉 LTspice – Analog simulation & validation 👉 Proteus – Embedded system simulation 👉 Signal integrity tools and EMI/EMC testing preparation 🚀 Why Work With Me? ✨ Proven record of delivering on time and exceeding expectations ✨ Strong communicator who makes complex things simple ✨ Practical experience with certification-ready hardware ✨ Affordable, efficient, and results-oriented 🎯 Let’s Build Something That Works Whether you're launching a new product, troubleshooting a design, or scaling to production, I’m ready to help bring your vision to life with solid engineering and dependable execution. 👉 Check out my work: github.com/zainsiddiqui-zz 📩 Let’s connect and build your next success.

Primarily an embedded developer (low-level, hardware registers, etc) but capable of putting my hand to all manner of programming tasks, especially in the mobile domain. With extensive experience in C, Android, Java, C# and web-based technologies such as HTML and CSS, I am capable of working on a multitude of tasks and jobs.

I help startups, product teams, and hardware companies 𝐝𝐞𝐬𝐢𝐠𝐧, 𝐝𝐞𝐯𝐞𝐥𝐨𝐩, 𝐚𝐧𝐝 𝐬𝐡𝐢𝐩 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐞𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 by combining 𝐟𝐢𝐫𝐦𝐰𝐚𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭, 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱, 𝐈𝐨𝐓 𝐜𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲, 𝐚𝐧𝐝 𝐫𝐞𝐚𝐥-𝐰𝐨𝐫𝐥𝐝 𝐡𝐚𝐫𝐝𝐰𝐚𝐫𝐞–𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧. With 𝟏𝟓+ years of experience in 𝐞𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐂 𝐚𝐧𝐝 𝐬𝐲𝐬𝐭𝐞𝐦 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, I focus on 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐦𝐚𝐢𝐧𝐭𝐚𝐢𝐧𝐚𝐛𝐥𝐞, 𝐚𝐧𝐝 𝐦𝐚𝐧𝐮𝐟𝐚𝐜𝐭𝐮𝐫𝐚𝐛𝐥𝐞 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 — not quick prototypes that break at scale. If you need 𝐄𝐒𝐏𝟑𝟐 𝐟𝐢𝐫𝐦𝐰𝐚𝐫𝐞, 𝐧𝐑𝐅𝟓𝟐/𝐧𝐑𝐅𝟓𝟐𝟖𝟒𝟎/𝐧𝐑𝐅𝟓𝟑𝟒𝟎, 𝐃𝐅𝐔, 𝐙𝐞𝐩𝐡𝐲𝐫 𝐨𝐫 𝐅𝐫𝐞𝐞𝐑𝐓𝐎𝐒 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, 𝐘𝐨𝐜𝐭𝐨-𝐛𝐚𝐬𝐞𝐝 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱 𝐜𝐮𝐬𝐭𝐨𝐦𝐢𝐳𝐚𝐭𝐢𝐨𝐧, 𝐬𝐞𝐜𝐮𝐫𝐞 𝐎𝐓𝐀 𝐩𝐢𝐩𝐞𝐥𝐢𝐧𝐞𝐬, 𝐨𝐫 𝐜𝐨𝐦𝐩𝐥𝐞𝐭𝐞 𝐈𝐨𝐓 𝐝𝐞𝐯𝐢𝐜𝐞 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, I deliver structured engineering from bring-up to deployment. 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 𝐁𝐞𝐬𝐭 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐅𝐢𝐫𝐦𝐰𝐚𝐫𝐞 & 𝐌𝐢𝐜𝐫𝐨𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐞𝐫 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • ESP32 firmware (Wi-Fi, BLE, MQTT, REST, OTA) • Nordic nRF52 / nRF52840 firmware & DFU • STM32, ARM Cortex-M, Arduino-based systems • Bare-metal, FreeRTOS, Zephyr development • Secure OTA (including production-grade FOTA systems) • Low-power design & optimization • Clean, scalable C/C++ firmware architecture 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐋𝐢𝐧𝐮𝐱 & 𝐎𝐒-𝐋𝐞𝐯𝐞𝐥 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 • Yocto-based Embedded Linux development • Linux bring-up on Raspberry Pi & custom boards • Driver integration & hardware debugging • Application-layer firmware on Linux • Production hardening & system optimization 𝐈𝐨𝐓 & 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐯𝐢𝐭𝐲 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 • AWS IoT Core, MQTT, TCP/UDP • Wi-Fi, BLE, LTE, GNSS, LoRa, CAN • Secure device-to-device communication • Gateway architecture & cloud integration • Reliable data transmission & validation 𝐇𝐚𝐫𝐝𝐰𝐚𝐫𝐞–𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 • ESP32, STM32, Nordic, u-blox, BeagleBone, Raspberry Pi • Sensor integration (IMU, environmental, GNSS, flow, etc.) • Hardware bring-up & debugging • Oscilloscope & logic analyzer-based validation • System-level architecture & scalability planning 𝗧𝗲𝘀𝘁𝗶𝗻𝗴, 𝗩𝗮𝗹𝗶𝗱𝗮𝘁𝗶𝗼𝗻 & 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗥𝗲𝗮𝗱𝗶𝗻𝗲𝘀𝘀 • Hardware & firmware testing • Debugging & troubleshooting • Performance optimization & reliability testing • Simulation, emulation & field-deployment validation • Production-ready handoff & documentation 𝐍𝐨𝐭𝐚𝐛𝐥𝐞 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐅𝐎𝐓𝐀 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐟𝐨𝐫 𝐮-𝐛𝐥𝐨𝐱 Architected and implemented a complete firmware-over-the-air system with secure updates and version control. 𝐍𝐨𝐫𝐝𝐢𝐜 𝐁𝐋𝐄 𝐖𝐞𝐚𝐫𝐚𝐛𝐥𝐞 𝐒𝐲𝐬𝐭𝐞𝐦 (𝐧𝐑𝐅𝟓𝟐𝟖𝟒𝟎-𝐃𝐨𝐧𝐠𝐥𝐞/𝐧𝐑𝐅𝟓𝟑𝟒𝟎) Designed GATT architecture with 517-byte MTU, serial command interface, and multi-sensor communication stack. 𝐋𝐨𝐑𝐚-𝐁𝐚𝐬𝐞𝐝 𝐒𝐦𝐚𝐫𝐭 𝐃𝐨𝐨𝐫 𝐋𝐨𝐜𝐤 (𝟐𝟎𝟎+ 𝐔𝐧𝐢𝐭𝐬) Built secure unlock feedback system with device-to-device communication and structured unit validation logic. 𝐒𝐦𝐚𝐫𝐭 𝐀𝐪𝐮𝐚𝐫𝐢𝐮𝐦 & 𝐏𝐥𝐚𝐧𝐭 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 Designed real-time environmental monitoring systems integrating sensors, pumps, and actuators with embedded control logic. 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 Firmware: C, C++, Embedded C, FreeRTOS, Zephyr, ESP-IDF, Nordic SDK, Arduino Embedded Linux: Yocto, Buildroot, OpenWrt Hardware Platforms: ESP32, STM32, nRF52, nRF53, ARM Cortex-M, Raspberry Pi, u-blox Connectivity: Wi-Fi, BLE, LTE, GNSS, LoRa, CAN, MQTT, REST, MODBUS Cloud & IoT: AWS IoT Core Tools: Git, CI/CD pipelines, Keil, PlatformIO, Oscilloscopes, Logic Analyzers 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞 End-to-end embedded expertise (firmware to deployment) Strong OTA and connectivity background Production-focused engineering mindset Clean, maintainable code architecture System-level debugging capability Experience supporting hardware bring-up and manufacturing transition Long-term collaboration & NDA-friendly 𝐊𝐞𝐲𝐰𝐨𝐫𝐝𝐬: Embedded Systems, Firmware Development, ESP32, nRF52840, nRF5340, Zephyr, FreeRTOS, Embedded Linux, Yocto, IoT, OTA, FOTA, ARM Cortex-M, MQTT, LoRa, BLE, AWS IoT, Modbus, Sunspec, Hardware Software Integration, Low Power Design, Production Firmware 𝗛𝗮𝘀𝗵𝘁𝗮𝗴𝘀 #EmbeddedSystems #FirmwareDevelopment #ESP32 #IoT #EmbeddedLinux #Microcontrollers #RTOS #FreeRTOS #HardwareEngineering #FOTA #OTA #IOT #MODBUS #SunSpec #LowPowerDesign #ProductionReady #IoTGateway If you need an 𝐄𝐦𝐛𝐞𝐝𝐝𝐞𝐝 𝐒𝐲𝐬𝐭𝐞𝐦𝐬 and 𝐈𝐨𝐓 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 with deep expertise in firmware, hardware design, manufacturing processes, and real-world deployment, I’m ready to collaborate.