๐ 12+ Years of Experience | Senior Full-Stack .NET Developer | SaaS & Enterprise Software Architect | Senior .NET Developer | C# | .NET Core | .NET 6/7/8 | MAUI | WPF | Delphi | Full Stack Web & Desktop Application Expert ๐
๐ Are you looking for a seasoned Full Stack .NET Developer | .NET MAUI & Delphi Expert to build, maintain, or modernize your existing systems into secure, scalable desktop, web, or cross-platform mobile applications? You're in the right place.
๐ฉ Send me an invite or message todayโIโm fully open to a test task or interview!
๐ฏ With over 12+ years of professional experience, I specialize in designing and building high-performance enterprise solutions using the .NET ecosystem, Delphi, and modern cloud technologies. I work with ASP.NET Core, C#, .NET MAUI, and legacy systems to deliver robust, scalable, and production-ready applications. My focus is transforming complex business requirements into clean, efficient, and future-proof software solutions.
๐ผ My Core Development Services:
โค Custom SaaS Application Development (MVP to Enterprise Scale)
โค Legacy System Modernization (Delphi, .NET Framework โ Modern .NET)
โค Desktop Applications using WinForms, WPF, and Delphi
โค Cross-Platform Mobile Apps using .NET MAUI
โค Web Applications using ASP.NET Core, MVC, and Blazor
โค RESTful API Development & Third-Party Integrations
โค Cloud Solutions, DevOps & Ongoing Maintenance
๐ง Tech Stack & Tools:
โ .NET, .NET Core, ASP.NET Core, C#
โ Delphi (Legacy + Modern Maintenance & Migration)
โ .NET MAUI, Blazor, MVC, Web API
โ SQL Server, MySQL, PostgreSQL, Entity Framework
โ React, Angular, JavaScript, HTML5, CSS3
โ Azure, AWS, Docker, CI/CD Pipelines
โ GitHub, Jira, Trello, Agile Development
๐ฏ Why Work With Me:
โ๏ธ Strong expertise in both modern and legacy systems (Delphi + .NET)
โ๏ธ Proven experience in building scalable SaaS & enterprise applications
โ๏ธ Clean, maintainable, and performance-optimized code
โ๏ธ Strong communication and fast response time
โ๏ธ Reliable long-term technical partner focused on business success
๐ค Letโs Build Your Next Software Success Story
If you're planning a new project or need help upgrading an existing system, Iโm the developer who delivers scalable, secure, and high-quality solutions on time and with precision.
๐ฉ Send me an invite or message todayโIโm always open to new opportunities and collaborations!
Iโm fully open to a test task!
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๐ Keywords / Skills
.Net Developer, .Net Expert, Senior .Net Developer, .Net Full Stack Developer, .Net Fullstack Expert, Expert .Net Developer, .Net Core Developer, .Net Core Expert, Expert .Net Core Developer, C# .Net Expert, C# Developer, C# Expert, .Net Software Engineer, .Net Architect, Senior .Net Engineer, Enterprise .Net Developer, SaaS .Net Developer, Backend .Net Developer, .Net API Developer, REST API Developer, Web API Developer, ASP.NET Developer, ASP.NET Expert, ASP.NET Core Developer, ASP.NET Core Expert, Expert ASP.NET Core Developer, ASP.NET MVC Developer, ASP.NET MVC Expert, ASP.NET Web Developer, Expert ASP.NET Web Developer, C# ASP.NET Developer, .NET Framework Developer, .NET Modernization Expert, Legacy .NET Migration Specialist, Delphi Developer, Delphi Expert, Delphi Legacy System Developer, .NET MAUI Developer, MAUI App Developer, Cross Platform App Developer, Mobile App Developer .NET MAUI, Blazor Developer, Blazor WebAssembly Developer, Razor Pages Developer, WinForms Developer, Windows Forms Developer, WPF Developer, Desktop Application Developer, Windows Desktop App Developer, Web Application Developer, Full Stack Web Developer, SQL Server Developer, Database Developer, Database Architect, Entity Framework Expert, LINQ Expert, MySQL Developer, PostgreSQL Developer, Azure SQL Developer, MongoDB Developer, Azure Developer, AWS Developer, Cloud Developer, Cloud Architect, DevOps Engineer, CI/CD Pipelines, Docker Developer, Microservices Developer, Distributed Systems Developer, Authentication Expert, JWT OAuth Expert, Identity Server Developer, Scalable Architecture Expert, Performance Optimization Expert, Software Maintenance & Support, Enterprise Software Development, SaaS Application Development, Third Party API Integration, Payment Gateway Integration, React Developer, Angular Developer, JavaScript Developer, TypeScript Developer, HTML5 CSS3 Developer, Frontend Developer, Backend Developer, Full Stack Engineer
Delphi
DevExpress
Standalone Application
SQL Programming
C#
ASP.NET MVC
.NET Framework
Entity Framework
Blazor
Desktop Application Improvement
VB.NET
ASP.NET
Windows App Development
Web Application Development
Business Applications Development
Business Application Maintenance
Back-End Development
Mobile App Development
Full-Stack Development
Central Desktop Development
Ankur B.
Ahmedabad, India
$20/hr
4.8
81 jobs
โ Upwork verified cross platform developer
Windows(13 Yrs exp), Android(7 Yrs exp)
Solutions architect and implementation expert in:
-- -- C# .NET/ VB .NET/ .NET Core
-- -- Web API/Web/Desktop applications
-- -- AWS - Lambda, S3, EC2
-- -- Python and PHP solutions
-- -- MsSQL/MySQL/SQLite
-- -- Android (Native) App Development
-- -- VB6 / VBA migration and maintenance
-- -- Data Analytics / scrapping / mining / manipulation.
-- -- Security solutions (encryption) for Windows/Web/Android/iOS technologies.
-- SCORM compliant Content / Application development and delivery expertise .
Believe in a Systematically Heuristic & a Radically Evolved Approach and Logic.
Proactive, result-focused and analytic IT Professional and Software Developer.
Committed with costumers to execute effective solutions on time and under the budget.
Business Analysis and Requirements Gathering: comprehensive skills to analyse and collect business requirements, define objectives and project scope.
Project Planning, Execution and Leadership: high experience in project planning with knowledge of resources management and budgeting. Team player with adaptability and leadership to achieve commons goals.
Product management: comprehensive skills managing customerโs accounts, developing proposals of IT services for clients and leading efforts in order to expand highly profitable services portfolios. Proven skills to create and analyse highly detailed MS Excel reports of sells, costs and profits.
Please do not hesitate to contact me to discuss your project in detail and determine how my skills will positively contribute to your team.
Standalone Application
Google Sheets
Data Analysis
Visual Basic for Applications
PHP
Visual Basic
Data Migration
Desktop Application
Automation
C#
Data Extraction
Spreadsheet Software
JSON
Microsoft Visual Studio
API Integration
Hemant V.
Bengaluru, India
$35/hr
5.0
5 jobs
Available to start immediately. I build and fix real .NET & C# software. Click on Invite button to start conversation
Iโm 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.
Iโve 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.
๐ง 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 isnโt 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.
โ๏ธ 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. Iโve worked with .NET apps both for new products and for migrations from older stacks like, where stability matters more than speed.
๐งฉ Types of systems Iโve worked on
Over the years, Iโve worked as a .NET Developer, across different environments:
๐ป Desktop software written in C#/.NET
๐ Web platforms where I worked as a full stack developer on .NET backends
๐ฑ Cross-platform apps built with .NET MAUI (Windows & Android only)
๐งฑ Larger products that required a true full stack developer approach
๐ Mixed systems where .NET AI integration was part of the stack
๐ฎ Internal tools and simulators developed with C#
๐ค 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.
๐ ๏ธ How I work with teams and data
Iโm 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.
๐ ๏ธ 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
โ Why clients choose to work with me
โจ I think like a long-term .NET Developer, not a short-term task runner
โจ I write C# code that other C# developers can actually maintain
โจ Iโm comfortable owning systems as a .NET Full Stack Developer
โจ I communicate clearly and avoid surprises
โจ I leave .NET full stack codebases cleaner and more stable than I found them
๐ Availability
โ Available now
๐ Remote-only
โฑ๏ธ Open to long-term collaboration
If youโre looking for a .NET Developer, who can step into an existing system and improve it safely letโs chat.
๐ Send a message and weโll review your setup together.
Application Improvement
Standalone Application
Windows Presentation Foundation
.NET Framework
Universal Windows Platform
Windows Forms
Desktop Application
C#
Python
Microsoft Visual C++
Docker
Ubuntu
GitHub
Android App Development
Bash Programming
Microsoft Windows PowerShell
Prototyping
Microsoft Azure
PostgreSQL
Angular
Gaurang D.
Ahmedabad, India
$20/hr
4.8
34 jobs
I help individuals, startups, SMBs, and enterprises build reliable, scalable, and user-friendly .NET applications.
With 12+ years of experience in custom software development, I specialize in transforming ideas into high-performing desktop, web, and mobile solutions that drive measurable business results.
โ ๐๐ก๐๐ญ ๐ ๐๐จ ๐๐จ๐ซ ๐๐จ๐ฎ
Youโll get more than just coding support โ I ensure your software is:
โข Reliable & Scalable โ Built on robust .NET architecture.
โข User-Friendly โ Clean UI/UX for smooth adoption.
โข Future-Proof โ Modern technologies and maintainable code.
โข On-Time โ Agile approach with frequent updates and demos.
โ ๐๐ฒ ๐๐๐๐ก๐ง๐ข๐๐๐ฅ ๐๐ฑ๐ฉ๐๐ซ๐ญ๐ข๐ฌ๐
โข Desktop Apps: WPF, WinUI 3, UWP
โข Mobile Apps: Xamarin, MAUI
โข Backend & Frameworks: .NET Core, .NET 5/6/8, .NET Framework (3.5+)
โข Architectures: MVVM, MVC, PRISM, Singleton, n-Tier, Dependency Injection
โข Databases: SQL Server, SQLite, MySQL, Oracle
โข Integrations: Google APIs, Social APIs (Facebook, Twitter, LinkedIn)
โข UI/Controls: DevExpress, SyncFusion, Telerik
โ ๐๐ก๐จ ๐ ๐๐จ๐ซ๐ค ๐๐ข๐ญ๐ก
โข Startups looking to launch MVPs
โข SMEs modernizing legacy systems
โข Enterprises needing robust desktop, web, or mobile apps
โข B2B & B2C businesses seeking tailored software solutions
โ ๐๐ฒ ๐๐ซ๐จ๐๐๐ฌ๐ฌ
1. Understand your goals & requirements
2. Propose the most effective technical approach
3. Share similar past work & align expectations
4. Start with a pilot milestone (risk-free)
5. Provide regular updates, demos, and post-deployment support
โ ๐๐ก๐ฒ ๐๐ฅ๐ข๐๐ง๐ญ๐ฌ ๐๐ก๐จ๐จ๐ฌ๐ ๐๐
โข Top Rated Plus on Upwork with 100% Job Success Score
โข Client-Centric Approach: clear communication, flexible engagement
โข Confidentiality Assured: NDA & secure contracts
โข Proven Track Record: worked with startups and global enterprises
โข Easy Collaboration: available via Skype, Teams, Slack, Zoom
Iโm not just a developerโIโm a partner in your projectโs success. My commitment to understanding your goals and providing ongoing support reflects my dedication to achieving the best outcomes for you.
Letโs work together to create something extraordinary. Updating an existing app, or building something from the ground up โ drop me a message, it is free to talk it over.
DevExpress
Windows Presentation Foundation
Xamarin
Desktop Application
Mobile App Development
C#
XAML
VB.NET
.NET Core
.NET Framework
Windows Forms
Windows App Development
Hybrid App Development
Android App Development
Universal Windows Platform
Nikhil S.
Una, India
$15/hr
5.0
4 jobs
๐จโ๐ป As a Full Stack Developer, I bring over a decade of ๐๐ฑ๐ฉ๐๐ซ๐ข๐๐ง๐๐ ๐๐๐ฌ๐ข๐ ๐ง๐ข๐ง๐ , ๐๐๐ฏ๐๐ฅ๐จ๐ฉ๐ข๐ง๐ , ๐๐ง๐ ๐๐๐ฉ๐ฅ๐จ๐ฒ๐ข๐ง๐ ๐ฐ๐๐ ๐๐ฉ๐ฉ๐ฅ๐ข๐๐๐ญ๐ข๐จ๐ง๐ฌ ๐ญ๐ก๐๐ญ ๐๐ซ๐ข๐ฏ๐ ๐๐ฎ๐ฌ๐ข๐ง๐๐ฌ๐ฌ ๐ ๐ซ๐จ๐ฐ๐ญ๐ก ๐๐ง๐ ๐ข๐ฆ๐ฉ๐ซ๐จ๐ฏ๐ ๐ฎ๐ฌ๐๐ซ ๐๐ฑ๐ฉ๐๐ซ๐ข๐๐ง๐๐๐ฌ. I am a results-driven developer who is committed to staying current with the latest trends and technologies in web development.
๐จโ๐ป๐๐ ๐๐๐๐๐๐ & ๐๐๐๐๐๐๐๐๐
โ ๐ ๐ซ๐จ๐ง๐ญ-๐๐ง๐:- HTML, CSS, JavaScript, Jquery,knockout.jd TypeScript, angular.js,Bootstrap,React.js, Next.js, Vue.js
โ ๐๐๐๐ค-๐๐ง๐:-.net ,c#,mvc, .netcore,ExpressJS, Node.js,
โ Window app:- Window forms, WPF
โ :-Mobile app:- xamarin , Android , React native
โ ๐๐๐ญ๐๐๐๐ฌ๐:- Sql,MySQL, MongoDB, Dynmodb, PostgreSQL.
โ ๐๐๐ ๐๐จ๐ฌ๐ญ๐ข๐ง๐ :- Namecheap, AWS (Amazon Web Server), Bluehost, Godaddy,
โ :- Repo Tools - Git, Bit bucket,SVN , Jira
๐จโ๐ป๐๐ฒ ๐๐๐ฌ๐ฉ๐จ๐ง๐ฌ๐ข๐๐ข๐ฅ๐ข๐ญ๐ข๐๐ฌ
โ API development and administration.
โ Develop data acceptance and storage solutions for websites
โ Write, test, and maintain development solutions for code-related problems
โ To identify new features, and communicate effectively with developers, designers, and system administrators.
โ Create a website architecture by utilizing correct product lifecycle approaches, such as Agile Scrum and frameworks.
โ Organize the system logic.
โ Provide remedies to difficulties with the system.
โ Debug and troubleshoot apps.
๐จโ๐ป ๐๐๐๐๐ ๐๐๐๐๐๐
โ Coding Responsive HTML5 + CSS3 pages
โ Creating Responsive pages using BootStrap
jQuery
CSS 3
SQL
AngularJS
ASP.NET
Knockout.js
JavaScript
Node.js
HTML5
NoSQL Database
Ragavan G.
Chennai, India
$20/hr
4.9
55 jobs
โข 14+ years of experience
โข I work on backend, frontend, databases, and Linux server administration
โข Main stack: .NET (C#) and TypeScript / JavaScript
โข I build web and multi-platform desktop/mobile applications
๐ Technologies
โข My main tech stack is .NET (C# or .NET) and TypeScript / JavaScript
โข For .NET, I work with ASP .NET, Blazor, WPF, Windows Forms, MAUI (formerly Xamarin), Avalonia UI, and more
โข For TypeScript / JavaScript, I prefer React, but I can also work with Angular, jQuery, or vanilla JS
๐ผ Server Administration and DevOps
โข Familiar with Debian-based Linux distributions like Ubuntu
โข Able to handle VPS baremetal or Docker-based setups
โข Able to automate workflows using Bash, Python, GitHub Actions, and similar tools
โข Experienced with cloud services such as AWS and Azure
๐ Database
โข Microsoft SQL Server
โข MySQL / MariaDB
โข SQLite
โข PostgreSQL
โข Microsoft Access
๐ก Skills
โข Strong in algorithm design and analysis
โข Great ability to solve programming and system trouble
โข Great at optimizing software performance
โข Flexible work style
โข Adaptive team player
๐ Self-Update
โข I regularly study new technologies to stay up to date.
๐ฐ๏ธ Flexible Availability
โข Open to collaborate across multiple time zones (US, CA, UK, EU, APAC, etc.)
โ Iโm not a robot.
โข Iโm a real human and a solo freelancer, not an agency
๐ Letโs Connect!
โข My name is Ragavan and Iโd love to help bring your ideas to life
โข Feel free to reach out so we can discuss how I can support your project
โข Not a Vibe Coder, but use AI-Assisted Programming tools to solve problems
โข Linus Torvalds once said, โTalk is cheap. Show me the code.โ So go ahead and check out my GitHub code.
๐ ๏ธ Common Tasks and Roles
โข Known as the Apple / macOS / iPhone guy
โข Build Windows app with .NET Framework & Windows Forms (WinForms) / Windows Presentation Foundation (WPF) / WinUI / Avalonia UI / MAUI / Xamarin
โข Build Windows Installer MSI / EXE from existing Windows App by using Wix / WixSharp
โข Build macOS app with Swift UI or .NET & Avalonia UI / MAUI / Xamarin
โข Build, sign, and notarize macOS app installer (PKG / DMG / ZIP)
โข Build web app with ASP .NET & Blazor / React / Angular / Vanilla JavaScript
โข Deploy and configure existing web apps by using Docker container to VPS / Cloud providers like AWS, Azure, or GCP
โข Ethical decompile / reverse engineer / source code retrieval / deobfuscation of existing .NET EXE / DLL / MSI or NinjaTrader Trading Indicator / strategy
โข Automate Windows UI tasks
โข Web scraping to retrieve online data / PDF / Images / any other files
โข Expert macOS system and app troubleshooting
๐โโ๏ธ What I'm not
โข I'm not a Vibe Coder. Don't get me wrong, I use AI to build software, but I don't solely rely on it.
DevExpress
XAML
Xamarin
React Native
Microsoft Silverlight
UX & UI
ASP.NET Web API
Windows App Development
Universal Windows Platform
Microsoft Windows
.NET Framework
C#
Entity Framework
Windows Presentation Foundation
Microsoft Visual Studio
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