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I am an electronics and firmware developer with experience in PCB design, firmware development, prototyping and SMD assembly. My journey started with hand crafting single sided PCBs — giving me a strong practical foundation from the ground up. PCB Design: 2 and 4 layer PCB design in KiCad 8,Kicad 9(Soon migrating to Kicad 10) & EasyEDA(Standard & Pro version) . Former EagleCAD user Schematic to manufacturing ready layout Custom footprint creation Gerber, drill, pick and place and BOM files Full submission support for JLCPCB(PCB & PCBA) and similar manufacturers Assembly & Prototyping: SMD soldering — 1206-0402 passives, QFN, TSSOP (except BGA) Through hole soldering Small batch prototype assembly Component procurement support Firmware & Connectivity: Microcontrollers — ESP32, ESP8266, Arduino, AVR, 8051 Cellular — Quectel EC25 & SIMCom SIM7672 with MQTT SSL/TLS Wireless — LoRa, WiFi, Bluetooth, GSM GPS — Ublox & Quectel module integration Displays — OLED, TFT, capacitive touch Protocols — I2C, SPI, UART, MQTT SSL/TLS, HTTP REST Motor drivers, WS2812 LED arrays, power circuits GPS- Quectel L89, Ublox M10S Special - WS2812 Led Projects include: GPS trackers, GSM security systems, water level controllers, , line followers, obstacle detection robots, WS2812 LED arrays and various ESP32 and Arduino IoT devices. I am a full time freelancer committed to clear communication and timely delivery — working with hobbyists, startups and commercial clients alike. Feel free to reach out!

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.

I am the Founder & Principal Consultant at Iottive, where I lead high-performance engineering teams to design, architect, and build sophisticated IoT and AIoT products for global clients. With 15+ years of deep hands-on experience, I specialize in transforming complex hardware-software ideas into robust, scalable, production-ready connected systems. My work sits at the intersection of embedded engineering, wireless connectivity, cloud architecture, and AI-driven intelligence — enabling organizations to move faster, reduce engineering risk, and build products that stand up to real-world industrial, medical, and consumer environments. If you’re looking for a consultant who can step in at a senior architecture level, bring clarity to your roadmap, design the right system architecture, and then guide your engineering stack toward successful delivery, I’m the partner you want. I support clients as a technical advisor, lead engineer, and fractional IoT architect, depending on the engagement. How I Work (High-End Consulting Model) I operate as a: - Fractional CTO - Fractional IoT Architect - Senior Technical Advisor - Lead Engineer for Complex Subsystems - R&D Partner for New Product Development - Technical Due Diligence Reviewer Why Clients Pay a Premium to Work With Me - I bring founder-level ownership, speed, and clarity. - I reduce engineering uncertainty — the most expensive part of IoT development. - I combine hardware, firmware, cloud, and AI knowledge — rare in one person. - I don’t guess — I architect solutions based on real-world deployments. - I lead teams and systems with long-term reliability in mind. - Clients come to me when they can’t afford false starts, delays, or re-architecture — and when they need an expert who can think 10 steps ahead. What I Bring to High-Level Projects 1. System Architecture for Complex IoT Products - I design end-to-end architectures covering hardware, firmware, connectivity, cloud, apps, data flow, device security, and scalability. 2. Embedded, Firmware & Connectivity Leadership - Zephyr, FreeRTOS, ESP-IDF - BLE 5.x, Mesh, Wi-Fi, NFC, UWB, Matter, Thread - OTA, secure boot, power optimization - I bring a strong combination of low-level engineering and system-level thinking, ideal for teams building new hardware devices. 3. Mobile + Device Integration (iOS/Android/Flutter/ReactNative) - I architect and build mobile experiences that sync reliably with embedded devices — pairing, control, OTA, dashboards, alerts. 4. Cloud, Data & Digital Twins - AWS IoT Core, Azure IoT Hub, MQTT/Kafka pipelines, digital twins, role-based access, observability. - This includes designing multi-layered systems for manufacturing, energy, healthcare, and consumer IoT. 5. Edge AI & Intelligent Automation - Predictive maintenance, anomaly detection, vision analytics, on-device inference. 6. Pilot, Certification & Production Advisory - I guide clients from prototype → pre-production → compliance (CE/FCC) → manufacturing scale. Industries Where I Deliver the Most Impact 🏭 Industrial & Manufacturing - Predictive maintenance, digital twins, AGVs, condition monitoring, energy management, QA automation. 🏥 Healthcare & Medical IoT - Remote patient monitoring, RTLS, equipment tracking, compliance-driven devices (HIPAA-ready). ⚡ Energy & Utilities - Smart metering, grid monitoring, field telemetry, outage detection. 🛒 Retail & Connected Commerce - Smart shelves, automated checkout, inventory tracking, real-time analytics. I work best in environments where reliability, security, real-time operation, and scalability matter. Engagement Style - High-touch, transparent communication - Technical leadership + hands-on engineering - Strong attention to architecture, quality, and long-term maintainability - Ability to work with your internal teams or bring my own specialists through Iottive Typical Client Profiles - Funded startups building a connected product - Enterprises modernizing manufacturing or medical systems - Hardware companies needing BLE/firmware/cloud expertise - Teams preparing for compliance, pilots, or production Core Technical Expertise - Embedded & Hardware - PCB & Circuit Design - Zephyr, FreeRTOS, ESP-IDF - Sensor architectures - Power optimization - OTA, secure boot, TPM - BLE, Wi-Fi, UWB, Zigbee, Matter, Thread - Mobile & UX for Connected Devices - iOS / Android - Flutter & React Native - BLE pairing, control, logging - Real-time dashboards - Cloud & Backend - AWS IoT Core - Azure IoT Hub - MQTT, Kafka, gRPC - Digital Twins - Role-based access & observability - AI & Analytics - Predictive maintenance - Anomaly detection - TensorFlow Lite, ONNX, Edge AI

✅ TOP Rated ✅ 100% Job Success ✅ 5 Star Reviews ✅ 12+ Years Experience ✅One of the Best BLE | Bluetooth | Beacons | NFC | RFID | QR Code | Custom Sensors/ Gateway | WiFi | LoRa | nb-IoT based IoT Service Provider I am a full-stack IoT technology expert with over 12 years of experience in building smart, scalable, and secure digital solutions. My specialization spans across IoT, Embedded Systems, Mobile & Web App Development, and Cloud Infrastructure, catering to industrial, commercial, and consumer-grade applications. I offer end-to-end product development services—from hardware prototyping and firmware development to mobile apps, web platforms, and cloud deployment. My focus is on turning ideas into robust, real-world solutions that prioritize usability, security, and performance. 🛠 Core Technical Expertise 🔹 Business Consulting → Product Discovery & MVP Planning → Technical Feasibility Assessment → Requirement Gathering & SRS Documentation → Wireframing & User Journey Mapping → Development Strategy & Budget Planning 🔹 Hardware & Firmware Development → PCB Design, Prototyping, Mass Production → Firmware for Microcontrollers: Nordic, Espressif, Qualcomm, TI, Cypress, NXP → Rugged hardware design for defense and industrial environments 🔹 Mobile App Development → Platforms: Android, iOS, Flutter, React Native → IoT Integrations: BLE, Beacons, NFC, RFID, QR Codes, Wi-Fi, and Smart Sensors 🔹 Web Development → Languages: Python, PHP, Java → Frameworks: Django, Flask, Laravel, Spring → APIs: RESTful APIs, GraphQL → Databases: SQL (MySQL, PostgreSQL), NoSQL (MongoDB, Firebase, Time Series DB) → Tools: Garafana, Chart.js, Highchart.js, Plotly.js 🔹 Cloud & DevOps → AWS: EC2, Lambda, S3, RDS, IoT Core, API Gateway, CloudFormation, CloudWatch → Serverless & Microservices Architecture → CI/CD pipelines and scalable backend infrastructure → Private Data Center Infrastructure: Secure, cost-efficient, and fully managed hosting with complete operational control, ideal for projects needing enhanced security, reliability, and compliance → Cloud strategy and optimization aligned with business needs 🔹 Wireless Interfaces & Protocols → BLE, WiFi, Beacon, Sensors, NFC, LoRa, UWB, QR Codes, RF, NB-IoT 🌐 Industries We Serve ✔ Healthcare & Fitness ✔ Automotive & Logistics ✔ Industrial Automation ✔ Agriculture ✔ Retail & Proximity ✔ Smart Cities ✔ Sports & Performance ✔ Indoor RTLS - People/Assets (Movable Or Non Movable) ✔ Satellite Systems 🌟 Why Choose Me? ✅ End-to-End Expertise – I offer complete development services, from hardware design and firmware engineering to mobile apps and cloud platforms, ensuring seamless integration and faster time-to-market. ✅ Industry-Focused Experience – I’ve successfully delivered solutions across diverse sectors including healthcare, automotive, agriculture, defense, and more tailored to real-world industry challenges. ✅ Scalable Engineering – My solutions are built with scalability in mind, ready to evolve with your product roadmap and business growth. ✅ Client-Centric Mindset – I work closely with you to understand your vision and deliver results aligned with your goals, timelines, and expectations. Let’s build the future together. 💬 Reach out today to discuss your IoT, embedded, or full-stack product vision. We’re here to turn complex ideas into connected, real-world solutions. Best Regards, Himen Patel

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

✅ 100% Job Success | Top Rated on Upwork 📊 49 Jobs | 5,025+ Hours Worked | 5★ Reviews 🏆 Certified by the Government of Mauritania (World Bank Projects) 👨‍💻 10+ Years’ Experience in Native Mobile App Development 🚀 Specialising in Automotive, BLE, IoT, HealthTech, Wearables 🤖 Fun Fact: I use AI tools like ChatGPT & Copilot to speed up development & debugging. 🔧 Core Tech Stack Android (Kotlin/Java): • Jetpack Compose, AndroidX, RxJava, Coroutines • Hilt, Dagger, Room, WorkManager • Material Design, ConstraintLayout, MotionLayout • Testing: Espresso, Robolectric, JUnit iOS (Swift/Obj-C): • SwiftUI, UIKit, Combine, CoreData, AVFoundation • MapKit, Vision, CoreML, SiriKit • Tools: Xcode, Instruments, Fastlane, SwiftLint • Testing: XCTest, XCUITest 🚘 Automotive & Multimedia • Android Auto & Apple CarPlay • MediaBrowserService, ExoPlayer, AVPlayer • Turn-by-turn SDKs: Google Maps, Mapbox, HERE • Voice Assistants: SiriKit, Google Assistant 📶 IoT, BLE & Connectivity • BLE, Classic Bluetooth, CoreBluetooth • Nearby Connections, WiFi Direct • MQTT, WebSockets, IoT Device Sync ☁️ Cloud, APIs & Backend • Firebase (Auth, Firestore, FCM, Remote Config) • Supabase, AWS Amplify, AppSync • REST APIs, GraphQL, Retrofit, Apollo • Local Storage: Room, CoreData, SQLite 💰 Monetization & Notifications • RevenueCat, StoreKit, Google Billing • FCM, APNs, PushKit, Local Notifications 🧱 Architecture & Clean Code • MVVM, Clean Architecture, Repository Pattern • SOLID Principles, Modular Codebases • DI Tools: Hilt, Dagger 🚀 Deployment & CI/CD • Play Console, App Store Connect • Fastlane, Bitrise, Firebase Distribution • GitHub Actions, Code Signing, TestFlight 🧠 Advanced Features • Geolocation, Geofencing, Biometric Auth, Background Services • Deep Linking, App Clips, Widgets, Spotlight, Siri Shortcuts • WatchOS, WearOS, HealthKit, Google Fit • Accessibility, RTL, Multilingual Support 🏅 Certifications Government of Mauritania – World Bank Projects Android Jetpack Masterclass – Udemy (Feb 2025) iOS SwiftUI Mastery – Simplilearn (Feb 2025) Agile Scrum Master – Simplilearn (Feb 2025) Firebase Essentials – Google Developer Training BLE & IoT Mobile Integration – Coursera 🤝 Why Clients Choose Me ✔️ 100% Job Success + Top Rated + Long-Term Clients ✔️ Native-first with Automotive, BLE & Wearable Expertise ✔️ Fast Delivery, Clean Code, Agile Collaboration ✔️ Sharp UI/UX & Robust Architecture for Scaling 📌 Let’s bring your mobile app idea to life — with speed, quality & clarity. #Kotlin #Swift #JetpackCompose #SwiftUI #AndroidAuto #CarPlay #BLE #Firebase #RevenueCat #WearOS #WatchOS #GraphQL #RoomDB #Fastlane #GitHubActions #MobileDev