Hire the Best NFC Freelancers
in India

Senior mobile engineer with 12+ years of experience building production-grade iOS and React Native applications, with hands-on experience in BLE/Bluetooth, NFC, native iOS development, third-party SDK integrations, subscriptions, and complex mobile features. I help startups and product teams build, stabilize, and ship reliable mobile applications especially projects where React Native needs to work closely with native iOS/Android capabilities, hardware devices, or third-party SDKs. I don't just focus on completing tickets. I take ownership of the mobile side of a product, understand the existing architecture, identify technical risks, and build solutions that are stable, maintainable, and ready for real users. WHAT I SPECIALIZE IN ---------------------------- React Native: • React Native with JavaScript / TypeScript • iOS & Android development • Native modules and bridges • Third-party SDK integrations • Performance optimization and debugging • Architecture, refactoring, and production maintenance • React Native / Expo upgrades Native iOS: • Swift, SwiftUI, UIKit, Objective-C • CoreBluetooth / BLE • CoreNFC / NFC • HealthKit • Apple Sign In • StoreKit & In-App Purchases • Push Notifications • Background capabilities • App Store submission and rejection fixes BLE / Hardware Integrations: • BLE device discovery, pairing, and connection • Reconnection and connection-state handling • Characteristic read/write and notifications • Real-time device data streams • Hardware-to-mobile communication • Wearable and IoT integrations • React Native + native Bluetooth modules Subscriptions & Monetization: • RevenueCat • StoreKit • Apple In-App Purchases • Paywalls and subscription flows • Entitlements and Restore Purchases API & Mobile Services: • REST & GraphQL API integration • Firebase Authentication, Firestore and Messaging • Supabase integration • OAuth and third-party services • Push notifications and real-time synchronization I primarily focus on mobile engineering and API/service integration, rather than positioning myself as a backend developer. TYPES OF PROJECTS I HELP WITH ------------------------------------------- • New React Native applications from Figma/designs or existing MVPs • Existing app rescue, stabilization, and refactoring • Native iOS functionality inside React Native applications • BLE, Bluetooth, NFC, and hardware integrations • Wearable and connected-device applications • RevenueCat, StoreKit, and subscription implementation • Real-time chat and data synchronization • Location, maps, and geofencing • Difficult React Native and iOS production issues • React Native / Expo upgrades and native build issues • App Store submission and App Review rejection issues HOW I APPROACH EXISTING CODEBASES ---------------------------------------------------- When taking over an existing application, I don't automatically recommend a rebuild. I first understand what is already working, where the risks are, and which parts can be safely reused. Then I separate the work into: Fix → Refactor → Replace → Build This keeps development practical and avoids rebuilding components that don't actually need to be rebuilt. For new applications, I focus on creating a clean foundation that can support future features without unnecessarily over-engineering the MVP. MY BACKGROUND ----------------------- Before becoming a full-time freelancer, I spent 9 years as a full-time mobile engineer, progressing from Junior iOS Developer to Senior iOS and React Native Developer at a product-focused software company. I wasn't job-hopping. I was building. During those years, I worked on production applications, made architectural decisions, integrated hardware devices, implemented native functionality, and solved the problems that appear when applications have real users and real production constraints. In 2023, I moved into freelancing with one goal: Bring the same engineering discipline and product mindset to clients that expect more than simply writing code. Since then, I've worked with startups and product teams on new applications, existing product improvements, hardware integrations, debugging, and production releases. WHY CLIENTS WORK WITH ME -------------------------------------- 🏅 Top Rated on Upwork ✅ 100% Job Success Score ⏱️ 2,800+ Upwork hours 💰 $30K+ earned on Upwork I work best with teams looking for more than someone who simply completes tickets. I take ownership, communicate technical trade-offs clearly, identify problems early, and focus on delivering a product that is stable, maintainable, and ready to grow. If you're building a new mobile product, taking an MVP toward production, integrating BLE/NFC or native functionality, or dealing with an existing codebase that needs to be stabilized, I'd be happy to take a look. Send me your requirements or an invite, and I'll give you a straightforward technical assessment and a practical path forward. Let's build something worth downloading.

🏆✅ On-Time Delivery | ✅🏆Blockchain Solutions | IOT Robotics | ROS2 | Nvidia Jetson | Edge Expert | ESP32 | Arduino🏆✅ | 🏆✅ Expert in Mobile, AI/ML, Web & 🏆 😇5M++ Users | AI Security Expert 💬 “Understood the requirements clearly, delivered ahead of schedule, and maintained strong security practices throughout.” 🧠 “Give me a straightforward plan and I’ll start work ASAP !” 🚀 About Me I’m a seasoned software engineer with 8+ years of global experience 🚀 delivering high-impact solutions across mobile apps, AI/ML, blockchain, desktop tools, and scalable web platforms. I specialize in building robust, secure, and performance-optimized applications — from idea to production. 🏆My portfolio includes successful deployments in: • 📹 Corporate Video Conferencing Platforms • 📺 Live Streaming & Media Broadcasting Solutions • 🧠 AI/ML Applications (Object Detection, Image/Video Generation, Face Swapping, etc.) • 🌐 Modern Web & Desktop Apps • 🔗 Blockchain, Cryptocurrency, and Decentralized Identity Projects • 🛰️ IoT Integrations 💼 What I Can Do For You • ✅ Build applications from scratch with clean, scalable architecture • 🛠️ Debug and modernize legacy apps, regardless of the tech stack • ⚙️ Set up CI/CD pipelines, server architecture, DevOps workflows • 🔒 Develop with security-first and performance-focused mindset • 🧾 Provide startup consulting and business-aligned software delivery 🎓 Education & Business Acumen With a B.Tech in Computer Science and deep consulting experience in the automobile industry, I bring a unique mix of technical and strategic thinking. I also mentor and support startups in bringing innovative ideas to market. 🌍 Why Clients Love Working With Me ✅ Excellent communication ✅ Reliable delivery — always on time ✅ Security-focused development ✅ Professional, honest, and easy to work with ✅ Proven success in diverse industries 📩 Let’s connect — I’m excited to help turn your vision into a powerful, working solution.

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. Please note that my hourly rate is $65/hour for architecture work and $35/hour for development work.

I help companies design, develop, debug, and productionize reliable embedded products - especially when the challenge involves Bluetooth Low Energy, battery life, device security, wireless connectivity, or complex firmware. I have 17+ years of embedded systems experience and lead ByteSpectrum Technologies. I remain directly involved in architecture, firmware development, debugging, technical decisions, and client communication. When required, I can bring additional ByteSpectrum hardware or mobile expertise into the project. Architecture → Hardware Bring-up → Firmware → Connectivity → Security → Validation → Production → Field Support ━━━━━━━━━━━━━━━━━━━━ 🏆 VALIDATED ENGINEERING RESULTS ━━━━━━━━━━━━━━━━━━━━ → 7 days of operation from a 19 mAh rechargeable battery → ~6 months of operation from a single coin cell → 250-node self-forming, self-healing wireless mesh network → 210-cell / 756 V EV battery-management architecture ━━━━━━━━━━━━━━━━━━━━ 🎯 CORE EXPERTISE ━━━━━━━━━━━━━━━━━━━━ 🔵 Bluetooth Low Energy (BLE) Extensive experience with Nordic nRF52 / nRF53 / nRF54, TI, and Silicon Labs platforms. • Custom GATT services • Sensor and high-rate data streaming • Secure pairing / bonding • BLE provisioning • OTA / DFU • Multi-device communication • BLE gateways • Custom BLE / multiprotocol mesh networks 🔋 Low-Power Embedded Systems Battery-powered wearables, healthcare devices, trackers, and sensors using: • Deep sleep and event-driven firmware • Sensor-based wake-up and ULP techniques • Battery profiling and power optimization 🔐 Embedded Device Security Security architecture and implementation including: • Secure BLE • Device-specific key provisioning • X.509 certificate provisioning • TLS / DTLS • Application-level encryption • Protected credential storage • Firmware validation and secure OTA ━━━━━━━━━━━━━━━━━━━━ 💻 EMBEDDED FIRMWARE DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━ Production-grade C/C++ development across Bare Metal, FreeRTOS, Zephyr, ThreadX, and Embedded Linux. • Device drivers, BSP, and bootloaders • OTA / FOTA • RTOS architecture • Sensor and peripheral integration • Board bring-up and prototype validation • Diagnostics, logging, and CPU/task profiling • Performance optimization • Long-duration testing • Production and field debugging ━━━━━━━━━━━━━━━━━━━━ 📡 IoT & MULTI-CONNECTIVITY ━━━━━━━━━━━━━━━━━━━━ Experience developing connected products and gateways combining: BLE | Wi-Fi | Ethernet | Cellular | LTE-M | NB-IoT | Zigbee | Thread | NFC | RFID | CAN | Modbus Typical systems include: • BLE-to-cloud gateways • Multi-device BLE aggregation • Ethernet/Wi-Fi with cellular fallback • Local socket communication • Device provisioning • Secure remote connectivity • Gateway and connected-node OTA ━━━━━━━━━━━━━━━━━━━━ 🌐 INDUSTRIAL ETHERNET & NETWORKING ━━━━━━━━━━━━━━━━━━━━ Hands-on experience with STM32H7 + ADIN2111 based 10BASE-T1L / Single Pair Ethernet systems. • Daisy-chain / line topology • Ethernet ring redundancy • IPv4 / IPv6 • lwIP / NetX Duo • FreeRTOS / ThreadX • Multi-node communication • UDP diagnostic protocols • Browser-based diagnostics • Network performance profiling • Long-duration validation ━━━━━━━━━━━━━━━━━━━━ ☁️ AWS IoT & CLOUD CONNECTIVITY ━━━━━━━━━━━━━━━━━━━━ Strong device-side AWS IoT Core integration experience: • MQTT / MQTTS • X.509 certificates • Device profiles and credentials • Provisioning • Telemetry and remote commands • Secure device-to-cloud communication ━━━━━━━━━━━━━━━━━━━━ 🏭 PRODUCT EXPERIENCE ━━━━━━━━━━━━━━━━━━━━ • Wearables & healthcare devices • ECG and physiological monitoring • Sports & fitness technology • Industrial IoT systems • Smart metering • IoT and cellular gateways • Asset tracking • Automotive & EV electronics • Battery Management Systems • Home automation • BLE / ANT / Zigbee / Thread networks • 10BASE-T1L industrial networks ━━━━━━━━━━━━━━━━━━━━ ⚙️ PLATFORMS & FRAMEWORKS ━━━━━━━━━━━━━━━━━━━━ Nordic: nRF52 | nRF53 | nRF54 | nRF91 Espressif: ESP32 | S2 | S3 | C3 | C6 | H2 Others: STM32 | Silicon Labs EFR32 / EFM32 / BGM | NXP | TI Wireless MCUs | Raspberry Pi | BeagleBone ESP-IDF | nRF Connect SDK / Zephyr | nRF5 SDK | Gecko SDK | FreeRTOS | ThreadX | Embedded Linux ━━━━━━━━━━━━━━━━━━━━ 🚀 HOW I CAN HELP ━━━━━━━━━━━━━━━━━━━━ ✅ Develop a new embedded product ✅ Move a prototype toward production ✅ Debug and stabilize existing firmware ✅ Improve BLE reliability or throughput ✅ Optimize battery life ✅ Implement secure provisioning and OTA ✅ Develop IoT gateways and multi-connectivity devices ✅ Solve hardware/firmware integration issues ✅ Perform board bring-up and prototype validation ✅ Investigate difficult field and long-duration reliability issues ━━━━━━━━━━━━━━━━━━━━ I am most valuable when the challenge is not simply writing code, but understanding why the complete embedded system behaves the way it does - and making it reliable in real-world use.

Holding a Rich experience in NFC, RFID & Bluetooth integrated solution. I have a skilled team in Device integration in Android, iOS & Desktop application Rich 20+ years of experience in IT organization. Mentor & Certified Scrum Master Solution Provided for Customers: 1. Unique Product Authentication 2. Know Your Customer - Mobile app by Scanning NFC Passports 3. Enterprise Software for Healthcare Industry with collecting information from Medical Device. 4. Inventory Tracking System using RFID / NFC 5. Employee Tracking using Passive & Active RFID 6. Event Management System using NFC 7. Digital Business Card Experienced in Integrating Mobile App (Android / iOS) with major NFC IC's 1. NTAG424 DNA & NTAG424 DNA Tag Tamper 2. NTAG213 / 215 / 216 3. DESFire Module M890 4. Mifare Classic 1K / 4K / 8K 5. Mifare DESFire EV1 / DESFire EV2 6. Mifare Ultralight & Ultralight C 7. M24LR04E-RDW6T/2 8. NFC-TAG-MN63Y1213_2020 Experienced in NFC & Bluetooth connectivity Readers : 1. ACR122U USB reader 2. ACR 1255U-J1 Bluetooth NFC Reader 3. ACR1311U-N2 Bluetooth NFC Reader RFID Device Integration with Cloud via MQTT: 1. [Passive RFID] 4 Port & 2 Port UHF RFID Fixed Reader 2. [Passive RFID] C72 Handheld UHF Reader 3. [Passive RFID] Sanray UHF RFID Integrated Handheld Reader F5009-H 4. [Active RFID] Sanray Active RFID Fixed Reader 5. [Passive RFID] UHF RFID Tag Printer Build applications using RFID UHF Tags: 1. Smartrac R6 DogBone RFID Wet Inlay (Monza R6) 2. Vulcan RFID Foam Backed Wristband (Monza R6) 3. Confidex Carrier Tough Slim RFID Tag (Monza 4QT) 4. Zebra UHF RFID Cards 5. Omni-ID Adept 650P RFID Cards 6. Triathlon Race Timing UHF RFID Sample Tags Expert Consultation in NFC, RFID & Bluetooth - Mobile App Development - iOS & Android - Mobile App Development - Native (Android - Java & Kotlin, iOS - Swift) & Flutter - Mobile App integration with PCB Boards & External Devices such as Weigh Scale - Server Development - C# Dot Net & Python - Build Interactive Website | Mobile App - UI & UX | Logo Design Proven Track Record - Building complete product for clients - Solution Provider - In Handling and Mentoring teams. Strong engineering & professional skills in Software Development Life Cycle (SDLC), Requirements Analysis, Business Analysis and Solution Architecture.

Are you looking to launch a high-performance iOS and Android app without the cost of hiring two separate development teams? I build production-ready mobile apps that load fast, scale smoothly, and pass Apple and Google App Store reviews on the first try. Whether you are launching a brand-new MVP or need to rescue a legacy codebase plagued by bugs and performance lag, I can help. Over the last 7 years, I have specialized in turning complex ideas into intuitive mobile experiences, focusing heavily on marketplace apps, e-commerce, and real-time automation tools. How I can help your project: Greenfield Development: Building your app from scratch using Expo or bare React Native, backed by clean architecture and TypeScript. Features & Integrations: Smooth implementation of Stripe/Razorpay, complex Google Maps workflows, real-time WebSockets, and Push Notifications. Codebase Optimization: Upgrading old React Native versions, fixing memory leaks, and streamlining state management (Zustand/Redux). Automated Deployment: Setting up EAS Build, Fastlane, and CI/CD pipelines so you can test updates instantly. My Core Stack: Frameworks: React Native, Expo, TypeScript State & Backend: Redux Toolkit, Zustand, Firebase, Supabase APIs & Tools: REST, WebSockets, Stripe, Razorpay, Google Maps API DevOps: EAS Build, Fastlane, App Store & Play Store Deployment Let’s get your app into the hands of your users. Click the "Message" or "Invite" button, and let's discuss your project requirements!