✦✦ Upwork Top Rated Mobile App Developer ✦✦
BLE & IoT Specialist | 12+ Years’ Experience | 40+ 5⭐ Projects
👋 Hi, I’m Bhavik — your partner for Bluetooth, IoT, Beacon, NFC & Smart Device innovation.
At the forefront of Bluetooth and IoT innovation, I have a proven track record of transforming complex ideas into cutting-edge mobile and embedded solutions.
With over 12+ years in mobile app development and 10+ years specializing in Bluetooth, BLE, NFC, iBeacon, and AIoT technologies, I help businesses build reliable, future-ready applications.
My portfolio reflects a relentless pursuit of quality, innovation, and measurable results, and I am recognized among the top Bluetooth developers on Upwork.
🔗 What I Do Best:-
✦ Architect & develop BLE / NFC-powered apps
✦ Build wearable & smartwatch apps (Apple Watch, Wear OS)
✦ Connect IoT devices seamlessly to iOS & Android
✦ Craft cross-platform apps (Flutter, React Native) & native apps (Swift, Kotlin, Objective-C, Java, SwiftUI)
✦ Backend/API with Node.js, React.js for complete product ecosystems
✦ Design & develop modern web applications (React.js, Node.js)
🚀 Industries I Transform:-
✦ Wearables & smart devices
✦ Home automation & connected living
✦ Sports & fitness tech
✦ Health & wellness platforms
✦ Automotive infotainment & in-car apps
✦ Retail, proximity services & marketing tech
✦ OTT & Media Streaming
✦ Custom SDK & API Development
🌟 My Commitment:-
Your project deserves more than code — it deserves a partner who understands business impact, user experience, and the technical nuances of Bluetooth and IoT.
Whether you’re launching the next-gen wearable, pioneering smart home tech, or creating new ways to connect users, I’m here to bring your vision to life.
Let’s connect, innovate, and take your project from concept to success — together.
iBeacon
Internet of Things
Bluetooth
Swift
Mobile App Development
Smartwatch
iOS
Android
HealthKit
Android App Development
Native App Development
Objective-C
Bluetooth LE
iPad App Development
Kotlin
Mykhailo T.
Kyiv, Ukraine
$45/hr
5.0
33 jobs
Experienced in cross-platform and native mobile app development, admin panels, dashboards, cloud, IoT solutions, web applications, and back-end (REST API, MQTT, etc)
I am a Team Lead of the CitrusDev team, a Ukrainian software development company with over 40+ mobile and web developers, designers, project managers, DevOps, and QA specialists onboard. This means that besides my programming skills, you always have access to a full-stack product design & and development team.
More about CitrusDev:
CitrusDev provides customized software solutions for IoT startups, SaaS companies, eCommerce stores, LMS, and enterprise clients worldwide. From building the product from scratch to extending the existing teams, we have expertise in a diverse set of open-source technologies and platforms to bring innovation in an agile fashion. Our team excels in Java, Kotlin, Swift, Flutter, React Native, PHP, Laravel, WordPress, React.js, and Vue.js.
With over 40+ people, CitrusDev has either empowered client teams or delivered end-to-end development projects for brands from the Internet of Things, consulting, eCommerce, marketing, or eLearning industries and is recognized as a Top IoT Developer in Ukraine by Clutch.
Mykhailo,
CitrusDev Team
Keywords: iOS, Android, Flutter, BLE, Bluetooth, Core Bluetooth, Dart, Swift, Java, Kotlin, ESP32, IoT development, Internet of Things, embedded systems, IoT solutions, IoT firmware, IoT cloud, MQTT, WebRTC,, ESP32, Raspberry Pi, nRF, Nordic Semiconductors, NB-IoT, LPWAN, LoRaWAN, Zigbee, IoT architecture, IoT security, sensor integration, IoT protocols, real-time data processing, wireless communication, smart devices, cloud integration, AWS IoT, Azure IoT, Google Cloud IoT, ThingsBoard, Node-RED, Kaa IoT, OpenHAB, Home Assistant, industrial IoT, IoT automation, remote monitoring, IoT gateways, AIoT, machine learning for IoT, data analytics, smart home, smart city, smart farm, smart agriculture, agritech, healthcare, smart industry, smart logistics, IoT dashboards, IoT consulting, device-to-cloud, IoT scalability, low-power IoT, IoT connectivity, mobile app development, IoT mobile apps, cross-platform IoT apps, Flutter, native Android, native iOS, NFC, GPS tracking, telematics, wearable technology, connected devices, smart sensors, IoT-enabled automation, PCB development, hardware design, circuit design, custom IoT hardware, IoT prototyping, embedded hardware development, IoT manufacturing, cloud-based IoT platforms, real-time IoT analytics, IoT data visualization, edge AI, fog computing, MQTT brokers, CoAP, LwM2M, IoT fleet management, thermal printers, barcode scanners, RFID, heart rate monitors, ECG sensors, temperature sensors, humidity sensors, gas sensors, motion sensors, accelerometers, gyroscopes, pressure sensors, environmental monitoring, smart wearables, industrial sensors, medical IoT devices, IoT-based tracking solutions
iBeacon
Android
iOS
Flutter
Internet of Things
Internet of Things Software
Bluetooth
Android App Development
Internet of Things Solutions Design
Raspberry Pi Firmware
STM32
Laravel
WordPress
MySQL
Vue.js
Tablet
CSS
Payment Functionality
Gabor F.
Gheorgheni, Romania
$75/hr
5.0
2 jobs
I'm a CTO level systems architect versed in systems architecture, web development, web applications, ERP platform development, business domain development, AI development.
I work with a team of developers from Romania, where we spent the last 8 years developing websites and platforms for the Luxury hospitality industry. Everything from headless website builds to SEO, to accessibility, to AI integration and retainers. Umbraco, .net web api, react headless frontend. Azure, AWS, Vercel, Terraform scripting, container based hosting.
I have also developed multiple SaaS platforms in the last 20 years, one a complex ERP system called Rocket - handling purchasing, production, finance, compliance and scheduling. It has recently been upgraded with AI based forecasting, basket optimization, etc. I work with a team of Senior Developers so we can take on any large piece of work confidently, to deliver on time, on budget.
Web Development
Web Application
.NET Core
.NET Framework
React
Web API
SaaS Development
Hospitality
AI App Development
Node.js
DevOps
Microsoft Azure
AWS Fargate
Yoel T.
Guatire, Venezuela
$10/hr
5.0
3 jobs
Senior Software Developer | .NET 9 & Angular | AI-Assisted Engineering
I am a Senior Software Developer specializing in designing and building robust, scalable, enterprise-grade software solutions. My focus goes beyond just writing code; I am passionate about clean, highly structured software engineering that guarantees long-term maintainability and high availability.
I implement modern ecosystems based on Clean Architecture, Hexagonal Architecture, and Microservices, ensuring business logic is perfectly decoupled from infrastructure. I strictly follow a Code-First development methodology (EF Core) for database management to maintain absolute domain traceability, avoiding direct SQL editor manipulations.
Additionally, I stay at the absolute forefront of modern software engineering by integrating advanced AI-assisted development workflows. I leverage frameworks like the Model Context Protocol (MCP), OpenCode, Aider, Ollama, and the Gemini API to accelerate development cycles, automate repetitive testing, and enforce strict architectural rules directly within the codebase.
What I do best:
High-Performance Backend: Developing robust APIs with .NET 9, implementing CQRS patterns, and handling asynchronous messaging with RabbitMQ.
Modern Frontend: Crafting dynamic, optimized, and responsive web applications using Angular v21.
Multi-Platform Solutions: Building cross-platform hybrid apps with MAUI and Blazor for unified web and mobile experiences.
Complex Integrations: Implementing multi-tenant SaaS architectures, processing high-volume secure notifications, and integrating complex financial payment systems.
If you are looking for a disciplined Senior Developer who brings architectural order, rigorous technical excellence, and cutting-edge AI efficiency to your project, let’s connect and discuss your goals.
Artificial Intelligence
Mobile App
Desktop Application
App Development
Android App Development
iOS Development
.NET Core
Yogesh S.
Pune, India
$30/hr
4.5
93 jobs
1. Expertise & Experience
AI Solutions Architect, Technical Leader, and Senior Full Stack Engineer with **17+ years of experience** delivering enterprise-grade software across desktop, web, cloud, and AI ecosystems. Proven track record of architecting scalable, secure, and business-driven solutions while leading cross-functional teams through the complete product lifecycle—from discovery and solution architecture to deployment and production support. Experienced in collaborating with global clients and executive stakeholders to drive digital transformation, modernize legacy platforms, and accelerate AI adoption. Strong expertise in Agile delivery, CI/CD, DevOps, engineering governance, technical mentoring, and cloud-native architecture with hands-on experience delivering **cloud-agnostic solutions across Microsoft Azure, Amazon Web Services (AWS), and Google Cloud Platform (GCP)**.
2. Technical Skillsets
Specialized in **Generative AI, Agentic AI, and Enterprise Software Architecture**, with hands-on expertise in **Python, OpenAI, Azure OpenAI, Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), AI Agents, LangChain, FastAPI, AI/ML, Prompt Engineering, n8n, Vapi, and intelligent workflow automation**. Strong Microsoft technology background including **C#, .NET, .NET Core, WPF, MVVM, MAUI, ASP.NET Core, Web API, Microservices, Azure, SQL Server, PostgreSQL, Git, Azure DevOps, CI/CD, GitHub Copilot, and Claude Code**. Experienced in designing secure, scalable, API-first, cloud-native applications deployable across Azure, AWS, and GCP.
3. Representative Projects
Architected and delivered **AI-powered enterprise solutions** including Enterprise AI Copilots, RAG-based Knowledge Assistants, Multi-Agent AI platforms, Document Intelligence solutions, and Voice AI assistants that automate complex business workflows and enhance decision-making. Designed intelligent engineering assistants for industrial automation, enabling natural language interaction, configuration generation, and technical knowledge retrieval using LLMs. Successfully delivered multiple enterprise desktop, web, API, and microservices-based platforms integrated with cloud services, modern DevOps practices, and enterprise security standards. Passionate about building production-ready AI systems that combine Generative AI with robust software engineering to deliver measurable business value and long-term scalability.
Windows Presentation Foundation
C#
Universal Windows Platform
Animation
Microsoft Expression Studio
DevExpress
Xamarin
Telerik
XAML
Model View ViewModel
Kanish B.
Pathankot, India
$35/hr
5.0
10 jobs
A competent and vibrant IT Professional offering 6 years of experience specialized in Software Industry. Having rich professional history and strong knowledge of different domains like SailPoint IdentityIQ/IdentityNow, Java, Powershell, Weblogic, OIM, Rest API, Software Development and Upgradation, Application Management, e-commerce and Mobile. I have also worked for world leading clients in Finance, Insurance and Security domain. I have a broad skill set and deep understanding, spanning from the design and implementation of diverse applications to proficiency in multiple programming languages and IDEs.
An enthusiast learner and a technology explorer.
SailPoint Platform
Java
Microsoft Windows PowerShell
Oracle Identity Management
Scripting
Automation
Artificial Intelligence
Python
SailPoint Technologies IdentityIQ
REST API
Java Collections Framework
User Identity Management
UI/UX Prototyping
Web Design
OKTA
AI Chatbot
JavaScript
Microsoft Active Directory
Browser Automation
Zero Trust Architecture
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