Hire the Best IOTA Freelancers in Karachi, PK

I build production-ready IoT systems using ESP32, STM32, PCB Design, Modbus RTU/TCP, MQTT, and FreeRTOS—covering everything from bare-metal firmware to cloud integration with AWS IoT Core and Azure IoT Hub, plus Flutter mobile apps and real-time dashboards when needed. My solutions are built for real-world industrial and commercial deployments, not just prototypes or breadboards. If you need embedded firmware that is stable, connected, scalable, and maintainable—let’s talk. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD FOR CLIENTS ✅ IoT Firmware Development End-to-end IoT firmware on ESP32, STM32, and ATSAM microcontrollers. MQTT over TLS, secure boot, OTA firmware updates, and low-power wireless design for battery-operated devices. I write firmware that runs in production — not just demos. ✅ Industrial Automation & Modbus Integration Modbus RTU and Modbus TCP firmware for industrial sensors, VFDs, PLCs, and energy meters over RS-485. FreeRTOS multitasking with concurrent Modbus polling, PID control loops, and cloud data publishing. Built for 24/7 uptime. ✅ Cloud-Connected Embedded Systems Full IoT pipeline: device firmware → MQTT broker → AWS IoT Core / Azure IoT Hub → time-series database → Grafana or custom dashboard. Experience with EMQX, Mosquitto, Firebase, and Docker-based deployments on Raspberry Pi. ✅ BLE & Wi-Fi Device Development Bluetooth Low Energy (BLE) firmware for sensor devices, wearables, and gateways. BLE GATT profiles, custom services, DFU (Device Firmware Update) over BLE. Wi-Fi provisioning, WPA2 enterprise, and mesh networking on ESP32. ✅ Flutter Mobile Apps for IoT Cross-platform iOS and Android apps that connect to your hardware via BLE, MQTT, or REST API. Real-time sensor dashboards, device configuration screens, push alerts, and OTA trigger from mobile. Flutter + Firebase or Flutter + custom backend. ✅ PCB Design for Embedded Systems Schematic capture and PCB layout in KiCad, EasyEDA, and Altium Designer. ESP32 and STM32 custom boards, power supply design, EMC considerations, and Gerber files ready for manufacture. DFM-reviewed layouts for production. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TECHNICAL STACK Microcontrollers: ESP32, ESP32-S3, STM32F1/F4, ATSAM, Arduino RTOS: FreeRTOS (tasks, queues, semaphores, timers, interrupts) Protocols: MQTT, Modbus RTU/TCP, BLE GATT, I2C, SPI, UART, RS-485, CAN, HTTP/HTTPS Cloud: AWS IoT Core, Azure IoT Hub, Firebase, Google Cloud IoT, EMQX Languages: C, C++, Python, Dart (Flutter) PCB: KiCad, EasyEDA, Altium Designer, Proteus, EasyPCB Tools: Docker, Git, VS Code + PlatformIO, STM32CubeIDE, ESP-IDF, FreeRTOS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ INDUSTRY EXPERIENCE HVAC Control Systems Multi-zone HVAC automation with STM32, Modbus RTU sensors, FreeRTOS PID control, and remote monitoring via Azure IoT Hub. Designed for commercial buildings with 24/7 reliability requirements. Energy Monitoring Three-phase energy monitoring sensors, ESP32 firmware, MQTT data pipeline, and real-time dashboards showing voltage, current, power factor, and kWh consumption per circuit. Industrial IoT Modbus-based data acquisition from industrial sensors and meters. RS-485 networks with multiple slave devices, data aggregation, cloud upload, and alarm management. Multi-Sensor Integration Environmental monitoring systems combining temperature, humidity, pressure, CO2, and motion sensors. Wireless sensor nodes with BLE or Wi-Fi, gateway aggregation, and cloud storage. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW TO GET STARTED Message me with a brief description of your project. I respond within hours and can usually schedule a discovery call within 24 hours. For fixed-price projects, I provide a detailed scope document before any work begins — no surprises. Shakaib Naqvi IoT Firmware Engineer · ESP32 · STM32 · FreeRTOS · AWS IoT · Azure IoT · Flutter · Modbus · PCB Design

I help startups, product companies, and engineering teams transform ideas into market-ready electronic products. With 10+ years of hands-on experience in embedded systems, electronics design, and industrial automation, I specialize in developing reliable, scalable, and production-ready solutions that work in the real world—not just in the lab. My expertise includes designing high-performance hardware and firmware using ESP32, STM32, Arduino, Raspberry Pi, and other embedded platforms. I have extensive experience building connected products that integrate seamlessly with cloud platforms, mobile applications, industrial equipment, and enterprise systems. Core Technical Expertise • Embedded Firmware Development (C/C++) • ESP32, STM32, Arduino, Raspberry Pi • Custom PCB Design (Altium Designer) • Schematic Capture & Hardware Architecture • Product Prototyping & Manufacturing Support • IoT Solutions (MQTT, Firebase, AWS, Cloud Integration) • UART, I2C, SPI, CAN, Modbus, RS-232, RS-485 • Industrial Automation & Control Systems • Sensor Integration & Data Acquisition • Wireless Technologies (Wi-Fi, Bluetooth, Zigbee, GSM/LTE) • Battery Management & Low-Power Design • Power Electronics & Embedded Power Systems • EMI/EMC-Aware PCB Layout & Design Validation • Hardware Debugging, Testing & Optimization What You Can Expect • Complete Product Development – Hardware, Firmware, and System Integration • Production-Ready Designs – Built with manufacturability, reliability, and scalability in mind • Strong Problem-Solving Skills – Able to diagnose and resolve complex hardware and firmware challenges • Clear Communication – Regular updates, transparent progress tracking, and professional collaboration • Long-Term Reliability – Designs focused on stability, maintainability, and real-world performance If you are looking for an engineer who can understand your requirements, take ownership of the development process, and deliver a professional, production-ready solution, I would be happy to discuss your project.

From prototype to production I build complete IoT and embedded systems that work in the real world, not just on a breadboard. With 5+ years of experience and 150+ projects delivered across aviation, agricultural, automotive, industrial and smart home applications, I handle the full stack: firmware, PCB design, cloud integration, and deployment. You get one engineer who owns the whole product not "three freelancers patching each other's work." What I build: Embedded firmware for ESP32, STM32, Raspberry Pi, Arduino, ATmega, and NRF52 including OTA updates, low-power optimization, watchdogs, and protocol stacks (UART, SPI, I2C, CANbus, RS485, Modbus). End-to-end IoT systems with Wi-Fi, BLE, LoRa, Zigbee, GSM, and NB-IoT connectivity, integrated with AWS IoT Core, Firebase, ThingsBoard, Node-RED, MQTT, and REST APIs. PCB design up to 3 layers using Altium, KiCad, and EasyEDA covering power supply, sensor interfacing, EMI/ESD protection, prototyping, and validation. Custom cloud dashboards and platform integrations: Grafana, Blynk, Home Assistant, ESP Rainmaker, and custom HTML/API solutions. Industries I've worked in: - Aviation (Solar powerd Aviation lights control) - Industrial IoT - Agriculture and Hydrophonics - Smart building automation - Automotive How I work: I communicate at every milestone, write clean modular code built for production (not just demos), and deliver on time. I'm open to NDA for any project requiring confidentiality. If you're building a smart device, an industrial automation system, or a connected hardware product, message me with your idea and we can scope it out in a quick call.

Need hardware that actually works in the field? I design PCBs and write embedded firmware for ESP32, STM32, Arduino and Raspberry. From schematic to production-ready prototype. Having 25+ years of hands-on experience. Clean layouts, stable firmware, and real-world tested results." I’ve worked extensively with microcontrollers, processors SOCs and development boards. My work includes 𝗲𝗺𝗯𝗲𝗱𝗱𝗲𝗱 𝗰𝗼𝗻𝘁𝗿𝗼𝗹𝗹𝗲𝗿𝘀, 𝗜𝗼𝗧 𝘀𝘆𝘀𝘁𝗲𝗺𝘀, 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻 𝗰𝗶𝗿𝗰𝘂𝗶𝘁𝘀, and wireless communication setups such as 𝗪𝗶-𝗙𝗶, 𝗕𝗟𝗘, 𝗟𝗼𝗥𝗮, and 𝗚𝗦𝗠. 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵: • PCB design (KiCad, EasyEDA, Altium) • Firmware development in C/C++ • ESP32/STM32 projects • Sensor automation & motor/servo control • MQTT/Firebase IoT dashboards • Long-range wireless communication • Converting ideas into working prototypes My approach is 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗮𝗻𝗱 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲-𝗱𝗿𝗶𝘃𝗲𝗻. I focus on clean 𝗰𝗶𝗿𝗰𝘂𝗶𝘁 𝗱𝗲𝘀𝗶𝗴𝗻, 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲𝗱 𝗳𝗶𝗿𝗺𝘄𝗮𝗿𝗲, and proper debugging to ensure 𝗹𝗼𝗻𝗴-𝘁𝗲𝗿𝗺 𝘀𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆. If you need a senior engineer who understands electronics from the 𝗳𝗼𝘂𝗻𝗱𝗮𝘁𝗶𝗼𝗻 𝗹𝗲𝘃𝗲𝗹 and can deliver a 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲, 𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻 then i am your guy.

With 8+ years of hands-on embedded systems experience, I help startups and product companies ship reliable, production-ready firmware from prototype to 33,000+ deployed devices worldwide. 🔧 WHAT I BUILD: • Bare-metal and RTOS firmware (FreeRTOS, Zephyr) for STM32, ESP32, nRF52, RP2040 • IoT device connectivity MQTT, BLE, Wi-Fi, LoRa, LTE-M • Bootloaders, OTA update systems, low-power optimization • Sensor integration, motor control, industrial protocols (Modbus, CAN, I2C, SPI) • Embedded Linux (Yocto, Buildroot) for application processors 📦 INDUSTRIES SERVED: Industrial automation · Smart home · Medical devices · Agriculture tech · Wearables ✅ WHY CLIENTS CHOOSE ME: • 100% Job Success Score every project delivered • Top Rated on Upwork with 5-star feedback • I write clean, documented code not just code that works, but code your team can maintain • Clear communication + weekly updates, no surprises If you have a hardware project from a quick firmware fix to a full product build let's talk. 📩 Message me with your project details and I'll respond within 01 hours. Tags: Electronics, Hardware, Firmware, PCB, PCB layout, Board Layout, Schematics, Altium Designer, IoT, Internet of Things, Electrical Engineer, Electrical Engineering, Power Electronics, Bluetooth, BLE, TI, Texas Instruments, FPGA, SoC, VHDL, Verilog, Xilinx, Altera, VHDL, C, C++, MCU, RTOS, Microcontroller, prototype, validation, Enclosures, BMS, SolidWorks, Android, iOS, Java, Swift, Mobile Apps, Database, React, AWS, Python, ESP32, Arduino, PLATFORMIO, PIC, NXP, Texas Instrument, Nordic, DIALOG, STM32, LCD, Raspberry Pi, Robotics, Oil and Gas Automation, RF, XBEE, Wi-Fi, BLE, Production, Prototyping, LoRa WAN, Manufacturing, Assembly, Motor Driver, Prototype, Wireless Module, Controllers, PLC, CREO, Industrial Designer, EASY EDA, KiCAD. Best Regards, Shan Ahmed Usmani

With over 10 years of experience, I have worked as a Team Leader overseeing a team of in-house accountants with a range of skill levels, from basic data entry personnel to certified accountants developing high-level solutions for international companies. I have a robust history of working successfully with a multitude of companies in various stages of growth, from start-ups and small businesses to large companies. I am now starting my own company as a sole freelancer exclusively on Upwork, with my employers' endorsement. As your point of contact, my accessibility is 24/7, so timezone differences are not an issue. I have connections with inexpensive accounting experts, accounting software developers, website developers, 3D rendering, and animation video experts to scale your business as it grows. My mission is to build long-term relationships with clients in all phases of their business. I possess distinguished international certifications in Certified Management Account (CIMA UK), Advance Diploma in Management Accountant (CIMA UK), Diploma in Management Accountant (CIMA UK), and Certified Business Accountant (CIMA UK). I have expert command in the following applications - QBO – Certified - Xero - Certified - Odoo - Wave - Zoho Book - QB Pro/Enterprise - Avalara - Fathom - Amazon - Dynamics / Business Central 365 - Stripe - Odoo implementation - Odoo Development - Tax Dome - PayPal - Bliss - UAE VAT I have successfully managed various projects for clients, including poultry producers, packaged food item distributors, Amazon traders, Shopify traders, grocery delivery mobile app startups, dropshipping traders, and real estate property traders. As a freelancer, I am hungry to build my business, so you can expect extremely prompt responses and turnaround to your communication. I am fluent in English (both written and spoken) and have an enormous amount of problem-solving experience to bring to your project, giving you the most cost-effective and quick results to keep your business moving forward. I am also savvy and creative and can think outside the box to come up with custom solutions that are an ideal fit for your company. If you're looking for an experienced and certified accounting professional with prompt communication, cost-effective solutions, and creative thinking, then I am the ideal fit for your project. Let's work together to achieve your business goals! Madiha (CGMA) (ACMA)