Available to start immediately. I build and fix real .NET & C# software. Click on Invite button to start conversation
I’m a .NET Developer and C# Developer with 13+ years of experience working on production systems built in C#/.NET.
Most of my work is focused on helping teams make their existing software more stable, scalable, and easier to evolve without risky rewrites.
I’ve worked in long-term roles as a C#/.NET developer, often joining projects where the codebase already exists and needs structure, performance improvements, or careful modernization.
🧠 How clients usually come to me
Very often, teams reach out to me as a .NET developer when they already have a product written in C#/.NET, but something isn’t working as it should.
Changes are slow, bugs appear in unexpected places, or the architecture feels fragile. In those cases, I step in as a C# .NET Developer who understands how real systems grow over time and how to improve them without breaking production.
Depending on the scope, I work either as a backend developer focused on logic and performance, or as a .NET Full Stack Developer when both backend and UI decisions need to be handled together.
⚙️ What I do in real projects
Day to day, my work as a .NET Developer is very practical.
I write and refactor C#/.NET, clean up .NET architecture, improve async flows, and make sure the application behaves predictably in production.
In many projects, this naturally turns into .NET full stack work handling backend services, APIs, and UI integration where I step in as a .NET Full Stack Developer.
When teams want a modern .NET Full Stack direction without splitting the codebase, I build new features or full applications using .NET MAUI/WPF/WinForms. I’ve worked with .NET apps both for new products and for migrations from older stacks like, where stability matters more than speed.
🧩 Types of systems I’ve worked on
Over the years, I’ve worked as a .NET Developer, across different environments:
💻 Desktop software written in C#/.NET
🌐 Web platforms where I worked as a full stack developer on .NET backends
📱 Cross-platform apps built with .NET MAUI (Windows & Android only)
🧱 Larger products that required a true full stack developer approach
🔗 Mixed systems where .NET AI integration was part of the stack
🎮 Internal tools and simulators developed with C#
🤖 Careful use of .NET AI where it actually added value
In several projects, I worked in React .NET setups, connecting React frontends to .NET backends while keeping responsibilities clean and clear.
🛠️ How I work with teams and data
I’m comfortable joining existing teams and reading unfamiliar C#/.NET codebases. I focus first on understanding why decisions were made, then improving things step by step.
I regularly work with SQL server, collaborate with Azure Data Engineer roles, and support data-heavy systems where performance & reliability are critical.
This mix of responsibilities often places me in a .NET Full Stack Developer role even when the original task starts as pure backend work.
🛠️ Tech Stack
.NET Framework, .NET 6 / 8 / 9 / 10
App Development - WPF, WinForms, WinUI, Blazor, .NET MAUI, MVVM
Concurrency & Performance - Multithreading, async/await, Task Parallel Library
Hardware & Protocols - Serial, Bluetooth LE, TCP/IP, UDP, RS232, RS422
Architecture & Quality - Clean Architecture, OOP, refactoring, performance tuning
Security & Testing - Unit testing, Polaris, Coverity, SAST, DAST, threat modeling
Data & Cloud - SQL Server, Azure
Tooling - Visual Studio, VS Code, GitHub, GitHub Actions, Docker
✅ Why clients choose to work with me
✨ I think like a long-term .NET Developer, not a short-term task runner
✨ I write C# code that other C# developers can actually maintain
✨ I’m comfortable owning systems as a .NET Full Stack Developer
✨ I communicate clearly and avoid surprises
✨ I leave .NET full stack codebases cleaner and more stable than I found them
📌 Availability
✅ Available now
🌍 Remote-only
⏱️ Open to long-term collaboration
If you’re looking for a .NET Developer, who can step into an existing system and improve it safely let’s chat.
👉 Send a message and we’ll review your setup together.
Desktop Application
Windows Presentation Foundation
.NET Framework
Universal Windows Platform
Windows Forms
Standalone Application
Application Improvement
C#
Python
Microsoft Visual C++
Docker
Ubuntu
GitHub
Android App Development
Bash Programming
Microsoft Windows PowerShell
Prototyping
Microsoft Azure
PostgreSQL
Angular
Manish S.
Indore, India
$18/hr
5.0
1 jobs
🚀 Android Developer | Java, Flutter & Kotlin | Scalable Apps & Performance Optimization
Looking to build a fast, reliable, and high-performing Android app? I specialize in native Android development using Java and Kotlin, helping businesses create smooth, scalable, and user-friendly mobile applications.
With 5+ years of experience, I develop and optimize Android apps that deliver excellent performance, clean architecture, and seamless user experiences—from initial build to long-term maintenance.
💡 What I Can Build for You
✅ Custom Android App Development (Java / Flutter/Kotlin)
Robust, scalable apps built with best practices and modern architecture.
✅ App Performance Optimization
Improve speed, reduce crashes, and enhance overall app stability.
✅ API Integration & Backend Connectivity
Seamless integration with REST APIs, third-party services, and databases.
✅ App Maintenance & Bug Fixing
Fix issues, upgrade features, and ensure your app runs smoothly over time.
✅ UI Implementation & Enhancements
Clean, responsive, and user-friendly Android interfaces.
🛠️ Core Expertise
Languages:
Java, Flutter Kotlin
Development:
Android App Development, Native Mobile Development
Architecture & Tools:
MVVM, Clean Architecture, Android SDK
Integrations:
REST APIs, Web Services, Third-Party SDKs
Database:
SQLite, Firebase
Performance:
App Optimization, Debugging, Bug Fixing
💻 Why Work With Me?
✔ Strong expertise in native Android development
✔ Build fast, stable, and scalable applications
✔ Focus on performance, usability, and clean code
✔ Reliable for long-term maintenance and support
✔ Clear communication and on-time delivery
If you're looking for a reliable Android developer to build, optimize, or maintain your app, feel free to invite me or send a message to discuss your project.
Android App Development
Java
Android SDK
Mobile App Development
API Integration
REST API
Firebase
SQLite
System Maintenance
AI Mobile App Development
Mobile App Redesign
Mobile App Improvement
Mobile App Design
Windows Mobile App
Cross-Device Compatibility
Native App
Flutter
FlutterFlow
SaaS Development
Purva P.
Surat, India
$25/hr
5.0
6 jobs
Are you looking for a Senior Flutter Developer, Flutter App Developer, Mobile App Developer, or AI App Developer to build, improve, or scale your mobile application?
I’m a Senior Flutter Developer and AI Mobile App Developer with 8+ years of software development experience, specializing in Flutter, Dart, iOS, Android, AI integration, Firebase, APIs, and scalable mobile applications. I work with startups, businesses, and agencies to build high-quality mobile products from idea → UI/UX → development → API/AI integration → testing → deployment → maintenance.
I specialize in building cross-platform Flutter applications for iOS and Android, as well as integrating AI capabilities to create intelligent, personalized, and automated user experiences.
🚀 Flutter & Mobile App Development
✅ Senior Flutter Developer
✅ Flutter App Development
✅ Flutter Mobile App Development
✅ Dart Development
✅ iOS App Development
✅ Android App Development
✅ Cross-Platform App Development
✅ Custom Mobile App Development
✅ Flutter UI/UX Development
✅ Responsive Flutter UI
✅ Flutter Bug Fixing & Debugging
✅ Flutter App Performance Optimization
✅ Flutter App Maintenance & Support
✅ MVP Development
✅ Startup App Development
✅ Mobile App Modernization
🤖 AI & Flutter App Development
I specialize in combining Flutter + AI to build modern AI-powered mobile applications.
✅ AI Mobile App Development
✅ AI App Development
✅ OpenAI API Integration
✅ ChatGPT Integration
✅ AI Chatbot Development
✅ AI Assistant Development
✅ AI Agents
✅ Generative AI Integration
✅ AI Content Generation
✅ AI Recommendation Systems
✅ AI-Powered Search
✅ AI Image & Text Processing
✅ AI Automation
✅ Third-Party AI API Integration
✅ Custom AI Features for Mobile Apps
I can integrate AI into your existing or new Flutter application to add smart assistants, chatbots, recommendations, content generation, automation, personalized experiences, AI search, and other intelligent features.
🔥 Firebase, Backend & API Integration
✅ Firebase
✅ Firebase Authentication
✅ Firebase Firestore
✅ Firebase Cloud Messaging (FCM)
✅ REST API Integration
✅ Third-Party API Integration
✅ Node.js API Integration
✅ Real-Time Database
✅ Push Notifications
✅ Payment Gateway Integration
✅ Google Maps API
✅ Location-Based Services
✅ Social Login & Authentication
📱 Types of Mobile Apps I Build
AI-Powered Mobile Applications
SaaS Mobile Applications
Healthcare & Fitness Apps
Dating & Social Networking Apps
Chat & Messaging Apps
Booking & Appointment Apps
Marketplace Apps
E-commerce Apps
On-Demand Applications
GPS & Location-Based Apps
Business & Productivity Apps
Subscription-Based Applications
Startup MVPs
Custom Business Applications
🏆 Experience
8+ Years Software Development Experience
20+ Mobile Applications Delivered
Flutter | Dart | iOS | Android | Firebase | AI | APIs
I have experience taking applications from concept to production, including Flutter development, UI implementation, backend/API integration, AI integration, testing, debugging, optimization, and App Store / Google Play deployment.
💡 Why Hire Me?
✔️ Senior Flutter & Dart expertise
✔️ Strong iOS & Android development experience
✔️ Specialized in Flutter + AI app development
✔️ Experience with OpenAI and third-party AI APIs
✔️ Clean, scalable, and maintainable code
✔️ Strong Firebase, backend, and API integration skills
✔️ Experienced in debugging and optimizing existing apps
✔️ End-to-end mobile app development experience
✔️ Clear communication and regular project updates
✔️ Experience working with startups, businesses, and development teams
Whether you need a Flutter Developer for a new mobile app, AI App Developer for an AI-powered product, Flutter bug fixing, Firebase integration, API integration, app modernization, MVP development, or ongoing Flutter development, I can help.
Send me your requirements, and let’s build your Flutter + AI mobile application.
Windows App Development
Dart
Flutter
Firebase
Android
iOS Development
Mobile App Development
Mobile App Improvement
Mobile App Bug Fix
Android App Development
Hybrid App Development
Native App Development
iPad App Development
Mac OS App Development
AI App Development
AI Chatbot
AI Development
AI Mobile App Development
Custom App
API Integration
Dhruval G.
Surat, India
$15/hr
4.9
64 jobs
Flutter & FlutterFlow Developer | Mobile Apps, SaaS & AI Solutions
Have an app idea but need an experienced developer who can turn it into a successful product?
I'm Dhruval G., a Top Rated Flutter Developer with 49+ completed projects, 100% Job Success, and $30K+ earned on Upwork. I help startups and businesses build high-quality mobile apps, SaaS products, and AI-powered solutions that are scalable, fast, and ready for real users.
What I Can Help You Build
✅ Flutter Mobile Apps (iOS & Android)
✅ FlutterFlow Applications
✅ AI-Powered Applications (OpenAI, ChatGPT, Gemini)
✅ SaaS Platforms
✅ Next.js Web Applications
✅ Node.js Backends & APIs
✅ Firebase & Supabase Solutions
✅ Subscription & Monetization Systems (RevenueCat)
✅ Progressive Web Apps (PWAs)
Why Clients Hire Me
✔ 49+ successful projects delivered
✔ 100% Job Success Score
✔ Top Rated Freelancer
✔ Full-stack expertise from frontend to backend
✔ Fast communication and transparent updates
✔ Clean, scalable, production-ready code
✔ Experience across startups, SaaS, fintech, e-commerce, edtech, and AI products
My Development Process
1. Discovery
We discuss your idea, business goals, and user requirements.
2. Planning
I create a clear roadmap with milestones, timeline, and cost estimates.
3. Development
Clean architecture, regular updates, and scalable implementation.
4. Testing & Launch
Complete testing, deployment, App Store and Google Play submission support.
Technologies & Platforms
• Flutter
• FlutterFlow
• Next.js
• Node.js
• Firebase
• Supabase
• OpenAI
• Gemini
• RevenueCat
• REST APIs & Third-Party Integrations
Industries I've Worked With
• AI & Productivity Tools
• SaaS Platforms
• FinTech
• E-commerce
• Education & EdTech
• Healthcare & Wellness
• Social Networking
• On-Demand Services
• Marketplace Applications
• Startup MVPs
Let's Build Something Great
Whether you need an MVP, a complete mobile app, a SaaS platform, or AI integration, I can help bring your idea to market efficiently and professionally.
Windows App Development
Flutter
Full-Stack Development
Firebase
Next.js
Node.js
Mobile App Development
FlutterFlow
API Integration
Android App
iOS Development
Web Application
Website
Javed K.
Mahuva, India
$20/hr
5.0
11 jobs
With over a decade of hands-on experience and a Top Rated Plus track record of delivering large-scale enterprise ecosystems, I provide the technical leadership necessary to turn complex business logic into high-performance digital products. My approach combines veteran architectural knowledge with AI-driven development to maximize delivery speed without compromising security or code quality.
📱 Dual-Specialist Mobile Architecture
I bridge the gap between native performance and cross-platform efficiency, specializing in the two most powerful frameworks for enterprise apps:
.NET MAUI & Xamarin Expert: Industry leader in migrating legacy Xamarin suites to .NET 8/9 MAUI, ensuring native rendering and optimized performance.
React Native Specialist: Building highly responsive, scalable mobile interfaces with seamless JavaScript/TypeScript integration and native module hooks.
Native Foundations: Deep proficiency in Swift, Objective-C, and Kotlin for specialized low-level hardware integrations.
Advanced Features: Complex UI/UX animations, MagStripe/NFC, biometric security, and real-time communication (SignalR/Firebase).
🌐 Web & Cloud Solutions
I build robust, high-traffic backends and modern web frontends:
Frameworks: ASP.NET Core MVC, Web API, and Blazor Hybrid for sharing code between Web and Mobile.
Frontend: Responsive, enterprise-grade architectures using Angular, Bootstrap, and HTML5.
E-commerce & CMS: Specialized in custom-built retail platforms and scalable inventory management systems.
🗄️ Database & DevOps
Databases: Advanced optimization and performance tuning for MS-SQL, SQLite, Oracle, DB2, and MongoDB.
AI-Enhanced Workflow: I leverage GitHub Copilot and Cursor for rapid prototyping and automated refactoring, delivering production-ready code in record time.
Professional Versioning: Expert management of Git (GitHub/Azure DevOps/Bitbucket) and TFS workflows.
🏆 Why My Partnership Drives Results:
1. Enterprise-Level Project Recovery
I specialize in taking over complex, stalled, or legacy codebases and transforming them into stable, live products. My goal is to reduce your technical debt while accelerating your roadmap.
2. Strategic Solution Consulting
I don’t just execute tasks; I act as a technical partner. I provide frequent, transparent communication and proactive architectural advice to ensure your product scales with your business.
3. Quality-First Architecture
By strictly following MVVM, SOLID, and Clean Architecture principles, I ensure your application is maintainable, testable, and ready for future upgrades.
4. Global Team Momentum
I lead a specialized team of UI/UX and Backend experts, allowing us to handle the full project lifecycle while maintaining 24/7 momentum across international time zones.
Mobile App Development
Infovisa MAUI
Xamarin
C#
Android App Development
iOS Development
.NET Framework
.NET Core
Mobile UI Design
Model View ViewModel
NFC
Azure DevOps
XAML
SQL
Web API
Bluetooth LE
ASP.NET MVC
SaaS Development
AI App Development
React Native
ASP.NET Web API
SQL Programming
Object-Oriented Programming
Windows Presentation Foundation
MVC Framework
Microsoft Azure
Saurav K.
New Delhi, India
$3/hr
5.0
5 jobs
🚀 Custom Android, Windows & AI Software Developer
Need a fast, scalable Android app or Windows desktop software that is reliable, secure, and easy to maintain?
I build custom Android applications, Windows desktop software, AI-powered apps, business tools, and automation systems. With a strong focus on performance, clean architecture, and long-term scalability, I deliver solutions for both new products and existing applications requiring modernization, optimization, or feature expansion.
⚡ Core Expertise
📱 Android Development: Kotlin, Java, Android SDK, Jetpack Compose, XML
🏗️ Architecture & UI: MVVM, Clean Architecture, SOLID, Coroutines, Hilt/Dagger
💻 Windows Desktop: C#, .NET, Custom Desktop Apps, Local Database Apps, UI Development
🤖 AI & Automation: OpenAI API Integrations, AI Chatbots, Workflow/API Automation, Data Processing
☁️ Backend & Databases: Firebase, Firestore, Room, SQLite, REST APIs, JSON
🔌 Key Integrations: Payment Gateways, In-App Purchases, Push Notifications, Google Maps/Location, Camera
🎯 What I Can Build For You
Mobile Solutions: Custom Android Apps, E-learning/Coaching Apps, E-commerce Platforms
Desktop Solutions: Windows Utilities, Business/Enterprise Software, SaaS Client Applications
Advanced Tech: AI-Powered Applications, Custom Business Automation Tools, Admin Panels
Monetization & Maintenance: Subscription & IAP Systems, App Modernization, Bug Fixing, Performance Optimization
🔧 Tech Stack & Cloud Services
Databases: Firebase • Firestore • Room • SQLite
APIs & Security: REST APIs • JSON • Authentication • Payment APIs
Ecosystem: Third-Party SDKs • Cloud Services • Play Store Deployment & Compliance
🤝 Let's Build Something Great
Whether you need a brand-new Android app, a robust Windows desktop application, an AI integration, an automation tool, or improvements to an existing product, I can turn your requirements into a production-ready reality.
Let's build something fast, reliable, and scalable. Send me a message to discuss your project!
Windows App Development
Android
Kotlin
Android Studio
Firebase
MySQL
Smartphone
SQLite
User Authentication
Android App Development
API Integration
Retrofit
Location-Based Service
Android SDK
Android NDK
Android Room Persistence
Android Debug Bridge
Windows Framework
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