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I design and build Flutter mobile applications that communicate with real-world smart devices using Bluetooth (BLE) and cloud IoT platforms. With 9+ years of mobile development experience, I help companies deliver stable, scalable, and production-ready mobile apps especially in IoT, BLE, and device-connected systems. 🧠 What I Specialize In Flutter & Mobile Architecture - Scalable Flutter apps using Clean Architecture - Modern state management (Riverpod, Bloc, Provider, GetX) - Platform channels for native Android & iOS integrations - Performance optimization and maintainable codebases BLE & Smart Device Integration - Bluetooth & BLE scanning, pairing, and reconnection logic - GATT services, characteristics, notifications - Reliable communication with smart devices (fans, sensors, health-care devices) IoT & Cloud Connectivity - AWS IoT Core integration using MQTT - Secure device-to-cloud-to-app communication - Telemetry, commands, and real-time updates - ThingsBoard SDK for device management and data visualization Backend & Real-Time Features - REST API integration - Authentication flows - Real-time communication (Socket-IO, Firebase) - Offline-first data sync strategies CI/CD & Release Automation - GitHub Actions for Flutter projects - Android & iOS Xcode build automation - Versioning and release pipelines - TestFlight & Play Store deployments 🛠 Technical Stack - Flutter / Dart - Android: Kotlin, Java - State Management: Riverpod, Bloc, Provider - BLE, NFC - AWS IoT Core, MQTT - ThingsBoard - SQLite, Drift, Hive - Firebase, AWS S3 - GitHub, GitLab, Bitbucket - CI/CD (GitHub Actions, Xcode) 🤝 Who I Work Best With - IoT startups & hardware companies - Agencies needing a senior Flutter engineer - Teams that need architecture ownership, not just task execution If your app involves BLE devices, smart hardware, or cloud-connected systems, I can help you build it right the first time. 🏆 Upwork Credentials - ⭐ Top Rated Freelancer (Top 10% on Upwork) - ✅ 100% Job Success Score - 💬 100% Client Recommendation Rate - 🌍 Long-term international client collaborations

I help companies turn electronics ideas into real, production-ready products. I am an Embedded Systems Engineer with 10+ years of experience designing hardware, developing firmware, and building connected IoT and Edge AI devices from concept to mass production. I have worked with startups, research labs, and global organizations, including collaborations with Fortune 500 companies, The University of Bristol, and PGA of America. I don’t just build circuits I build complete products that are reliable, scalable, and ready for manufacturing. What I do end-to-end • System architecture and product definition • PCB design and hardware engineering • Firmware development and optimization • Edge AI integration (TinyML, on-device inference) • Wireless connectivity and IoT cloud integration • Mechanical design (enclosure + DFM-ready CAD) • Prototype development and production support I regularly take products from idea to prototype to production-ready hardware. --- Core expertise Embedded hardware development • ESP32 • Nordic (nRF51, nRF52, nRF91) • STM32, STM8 • Raspberry Pi platforms • NXP, Snapdragon, BeagleBone • NVIDIA Jetson AGX Orin • Google Coral Edge TPU • Axelera Metis AI Platform • EdgeCortix SAKURA • ARM Cortex controllers • Texas Instruments MSP and CC series • Atmel AVR and Arduino I design reliable embedded systems used in IoT devices, industrial equipment, wireless products, and research hardware. --- PCB design and hardware engineering Tools • Altium Designer • KiCad • EagleCAD • OrCAD Services • Schematic design • Multilayer PCB layout • High-speed PCB design • RF and wireless board design • Design for manufacturing (DFM, DFA) • BOM optimization and cost reduction • Production-ready manufacturing files --- Firmware development • Embedded C and C++ • FreeRTOS • Embedded Linux • Driver and low-level development • Low-power firmware optimization --- Edge AI • TinyML and on-device AI models • Sensor data processing and inference at the edge • ESP32 / ARM-based AI deployment • Reducing cloud dependency with real-time intelligence • AI-enabled IoT product design --- Communication and connectivity • Bluetooth, BLE, BLE 5 • WiFi • LoRa, LoRaWAN • NB-IoT • Thread, Zigbee • NFC, RFID • CAN • UART, SPI, I2C, USB, Ethernet Cloud and protocols • MQTT • HTTP • AWS IoT, AWS Lambda and cloud integration --- Mechanical design • Enclosure design for embedded products • 3D CAD modeling (production-ready) • Thermal and space optimization • Design aligned with PCB and manufacturing constraints • Support for injection molding and prototyping --- IoT product experience • EdgeAI Device for ATM • High-Speed Autonomous Surveillance Drone (350–400 km/h) • AI Personal Assistant • Smart Home Automation Systems • Wireless IoT Sensors • Industrial Monitoring Systems • GPS and Tracking Devices • Medical and Research Hardware • Automation Controllers • Cloud-connected Embedded Devices --- What I deliver • Production-ready PCB designs • Stable, optimized firmware • Functional hardware prototypes • Edge AI-enabled intelligent devices • Hardware debugging and performance optimization • Complete manufacturing support and documentation --- Client feedback “Bhavin is such a fantastic developer to work with. He was professional and handled all modifications seamlessly. He also immersed himself in the problem and provided unique solutions to the hardware and software challenges.” “I would happily employ Bhavin again. He is extremely efficient, works very fast, and communicates very well. The product was delivered on time and worked perfectly.” --- If you are building a new hardware product, IoT device, or Edge AI system, feel free to reach out to discuss your project. Best regards Bhavin Vaghela

I help companies design, build, and scale industrial-grade IoT platforms — from edge devices to cloud and real-time dashboards. With 10+ years of experience, 36+ projects, and 35,000+ connected devices, I specialize in delivering production-ready IoT systems that are scalable, secure, and reliable in real-world environments. 🔧 What I Do 🧠 IoT Architecture (End-to-End) • Edge → Gateway → Cloud → Dashboard design • Multi-tenant IoT platforms • High-throughput telemetry pipelines • Real-time monitoring & alerting systems ⚙️ Industrial & Edge Integration • Protocols: MQTT, OPC UA, Modbus (RTU/TCP), DNP3, IEC104, CAN/J1939 • PLC, SCADA, RTU integrations • Edge computing (Python, Docker, Linux-based gateways) • Offline-first and low-bandwidth architectures ☁️ Cloud IoT (AWS & Azure) • AWS IoT Core, Lambda, API Gateway, DynamoDB, Timestream • Azure IoT Hub, Event Hub, IoT Edge, Digital Twins • Secure device onboarding (X.509, JITP/JITR) • Scalable ingestion (Kafka/Kinesis-based pipelines) 📊 Dashboards, Data & Analytics • ThingsBoard (CE & PE) – custom dashboards, rule chains • Grafana, InfluxDB, Timeseries analytics • Real-time event processing & anomaly detection 🔄 Deployment & DevOps • Docker, Kubernetes, CI/CD pipelines • OTA updates & device lifecycle management • Production monitoring, logging, and scaling 💡 Key Strengths ✔️ Designed systems handling thousands of devices & high-frequency data ✔️ Strong in Edge + Cloud combined architecture (not just one side) ✔️ Experience with industrial environments (Oil & Gas, Energy, Fleet, Smart Infra) ✔️ Focus on performance, reliability, and long-term scalability ✔️ Able to translate business problems into technical IoT solutions 🤝 Let’s Build Something Scalable If you need someone who can own your IoT system end-to-end — from architecture to deployment — I can help. 👉 Message me with your use case, and I’ll propose a clear, scalable solution approach.

With over 18 years of experience, I am a seasoned professional in embedded and IoT product development. My expertise spans sensor-based solutions, audio algorithm development, and cloud-based SaaS solutions using AWS, GCP, and Azure. I also have extensive experience with mobile applications, including BLE apps / hardware integration over BLE developed with Flutter, ReactNative, SwiftUI, Kotlin (native development ) too. I began my career as an Audio DSP firmware engineer, specializing in digital signal processing algorithms and filter design for multichannel audio decoders and encoders, building and optimizing them for multiple DSP chipsets. This foundation led me to technical leadership roles within offshore development centers and eventually into leading product development in IoT startups. Of late, I've focused on developing analytical solutions in the smart home, Industry 4.0, and health tech sectors using nRF52, STM32 and ESP32. My key contributions include solution architecting and algorithm design for these cutting-edge applications, including BLE-powered medical device solutions. I am a process-oriented professional with deep knowledge in audio compression, data encoding, DSP Filters and post-processing algorithms. My core technical skills include: - Proficiency in C, C++, Python and Assembly programming for optimizing algorithms on resource-constrained embedded platforms. I'm also well-versed in golang and node.js. - Designing and building cloud-based analytical IoT solutions for enterprise energy management, leveraging multiple services across AWS ( including AWS IoT Core, AWS Greengrass ), GCP, and IBM Cloud. - Extensive knowledge of the BLE stack, having developed mobile applications for diverse IoT solutions and BLE-based medical devices. - Hands on experience with all BLE profiles - LE Coded PHY, 1M, indoor positioning using Beacons, AoA etc. - Experience with MQTT-based solutions, including hardware - firmware integration, integration of the solution with custom cloud platforms and GCP / AWS IoT Core. - Experience building multiple medtech / healthcare solutions - involving hardware / firmware / mobile application integrated over Bluetooth ( BLE ) and cloud applications adhering to HIPAA. Also worked with FDA / 510(k) compliance processes. - Proficiency in LoRa technology, having built embedded applications for IoT solutions primarily using LoRa EU and US frequencies. My background in developing regulated medical devices and health tech solutions makes me the ideal candidate for your project. I have extensive experience architecting and implementing secure, HIPAA-compliant solutions that integrate hardware, firmware, and mobile applications over BLE. I've successfully navigated the complexities of FDA and 510(k) compliance processes, ensuring not only technical excellence but also regulatory adherence. My skills include developing robust BLE-based medical device solutions, building analytical cloud platforms, and optimizing firmware for performance and reliability. I can offer both the deep technical skills and the critical regulatory knowledge required to bring your innovative medical product to market safely and effectively. As a specialist in wireless communication protocols for IoT, I can provide the targeted expertise you need for your project. My extensive hands-on experience with the entire BLE stack—including AoA, LE Coded PHY, and indoor positioning with Beacons—allows me to tackle even the most complex integration challenges. I've developed numerous mobile applications that seamlessly integrate with BLE hardware, ensuring a smooth and reliable user experience. I am also highly proficient in LoRa technology, having built complete embedded applications for EU and US frequencies. Whether you need to optimize a high-performance BLE application or build a long-range LoRa network, I have the in-depth knowledge to deliver a top-tier solution. As you can see, I have over a decade of experience in leadership roles, having led cross-functional offshore teams, including managing groups of 20 or more engineers and QA professionals. I'm eager to take up the next Upwork project and contribute my skills / experience to a highly competitive team.

IoT Consulting, IoT solution development, IoT Prototype development, IoT Minimum Viable Product ( MVP ) development since 2014. 100+ IoT projects completed Served clients from over 20 countries Over 30000 hours in IoT projects With over a decade of experience and a proven track record of delivering 100+ successful IoT projects, we're your partners in innovation. Our team of IoT enthusiasts, embedded engineers, and web/mobile app developers has successfully transformed complex ideas into tangible IoT solutions across diverse industries. We have helped clients optimize operations, reduce costs, and drive growth in a variety of industries. Sensorvision IoT Platform: Our customizable platform excels in device management and data visualization, providing actionable insights. We specialize in IoT Development with the following technologies - ESP32, LoRa, LoRaWAN, BLE, Particle, Mobile app development with React Native IoT use cases - IoT enabled product development, Energy monitoring and management, High value asset monitoring and tracking, Industrial condition monitoring, Smart farming, Hydroponics, Irrigation control, IoT building automation, Smart garments, Rule-based alert systems The IoT applications we have developed used: Hardware platforms used – Particle (Electron, Argon, Boron, Xenon) ESP(ESP8266, ESP32) STM 32 nRF 52 Arduino Raspberry Pi, ATmega and ARM Pycom Controllers Communication networks - Wi-Fi and Cellular (GSM/GPRS) Bluetooth and BLE LoRa, LoRaWAN and LPWAN Zigbee and Zigbee Mesh BACnet and Modbus Sigfox, NRF and MRF transceivers and Ethernet connections. Cloud services - Integration established using HTTP and MQTT protocols AWS cloud - EC2, S3, SNS, AWS IoT, AWS Greengrass, AWS Lambda, Cognito and RDS & Dynamo DB. Azure IoT Particle Device Cloud Google Cloud ThingsBoard IBM Bluemix Clients’ custom cloud platforms Web and Mobile App Development - LAMP, MEAN & MERN stacks Core Technologies – HTML, CSS and JavaScript JavaScript – Node.js, Angular.js, React.js, Vue.js, React Native .NET, Python and Node-RED Ionic and Native App Development Actuators - Solenoid Valves, Relays and LEDs. Hardware communication protocols - UART, SPI, I2C, USART, RS232, RS485, 1-Wire. Sensors Used – GPS based tracking solutions with additional sensor integration IMU sensors (Accelerometer, Gyrometer, Magnetometer) Environmental sensors (Thermocouple, Dht22, Lm35, DS18B20, BMP280, Rain sensors, Leaf wetness sensor, Soil moisture sensor, Water level, Water flow, Ambient light, LDR) Proximity sensors (Ultrasonic, IR, PIR) Detection sensors (Contact, Level, Hall effect sensor, Reed switch, Limit switches) Air quality sensors (OMRON, Sensiron, Co2 Sensors, Dust sensor, VOC, MQ135, CCS811) Vibration sensors, Vibration sensor switch, Tilt sensors Motion sensors (ADXL345, GY521)

Firmware, Embedded systems software, C/C++/Assembly, BLE, Sub-GHz, LoRA, Wi-Fi, Thread, Matter, Zigbee, IoT, BLE Mesh network, various MCU's, Zephyr nrf connect sdk, stm32 sdk, various ble sdk