I’m a Senior .NET Developer with 13+ years of experience, including 3 years as a Project Lead and 1 year as a Solution Expert. I build high-performance applications, Web APIs, microservices, and embedded-domain solutions.
Core Skills
C#, .NET Core, Web APIs, Microservices, WPF, WinForms, OCR, Text extraction, Python automation
SQL Server, MySQL, Elasticsearch, UART, USB, Serial IO communication, Azure Cloud, Azure Open AI integrations, Embedded, Camera integration, , AI + Automation
What I Deliver
Scalable backend systems
API development & integrations
Embedded system applications
Cloud-based automation solutions
I combine strong technical expertise, leadership experience, and hardware + software integration skills to deliver reliable, end-to-end solutions for clients.
App Development
C#
.NET Core
Web API
REST API
Azure App Service
Azure OpenAI Service
Python
Microsoft SQL Server
MySQL
Elasticsearch
Embedded Application
Windows Forms
Windows Presentation Foundation
Nirmal K.
Chennai, India
$15/hr
5.0
2 jobs
🏆 Upwork Professional
⭐ 5-Star Ratings
🔰10+ years of experience
⌚ 5700+ Hours on software Development
✅ Unlimited revision on design to ensure you get exactly what you're looking for.
💯 2 hours of response time with 100% Dedication
⌚ Full-Time Availability
ASP.NET CORE | REACT | ANGULAR | NODE JS | WEB API | C# | MVC | SQL | PHP | MICROSERVICES | DOCKER | SQL SERVER | NoSQL | Blazor | CLOUD | AWS | Azure | Astro | VUE | PYTHON | AI
With a robust foundation in .NET and a proven track record on Upwork, I offer over 10+ years of expertise in full-stack development, earning a distinguished Upwork Top Rated PLUS Professional status. My commitment to delivering high-quality code is reflected in my ⭐ 5-star Ratings and ⌚ 5700+ hours of dedicated service.
Here's a snapshot of my skills and expertise: 📷
My Stack Development expertise includes proficiency in C#, JavaScript, and a range of web development technologies such as .NET Framework, ASP.NET, AngularJS, Bootstrap, and more. I excel in Cloud Services like AWS and Azure, implement Microservices with Docker and Kubernetes, and leverage frameworks like Entity Framework and React. With a solid foundation in database development and API integration, I ensure optimal project delivery, including web applications, API integrations, website optimizations, and responsive design. My skills extend to Smart Contract development, UX/UI design, and project management using Agile methodologies, emphasizing creativity, efficiency, and a commitment to enhancing user experiences. ✨🚀
Technical Proficiency:
💪 Strong Skills in C# and JavaScript
🌐 Full Stack Development Expertise: .NET Framework, RESTful Architecture, ASP.NET, AngularJS, PHP,Bootstrap, AJAX, ASP.NET MVC, jQuery, Blazor
☁️ Cloud Services: Amazon Web Services (AWS), Azure Cosmos DB
🐳 Containerization: Docker, 🚢 Kubernetes
🌐 Microservices Architecture: Implementation and Optimization
💻 Frameworks: Entity Framework, ASP.NET Core, React
📚 Version Control: Git
📊 Analytics: Google Analytics
Database Development:
📚 Databases: PostgreSQL, Microsoft SQL Server, MongoDB, SQLite
🏗️ Database Design: Smart Contract, Database Architecture
🔌 ORM: Entity Framework, ADO.NET
🌐 API Integration: ASP.NET Web API
😊 Web Servers: Microsoft IIS
🆕 Experience with Blazor: Building interactive and client-side web applications with Blazor.
Other Skills:
🌐 UX & UI Design: Creating seamless user experiences and interfaces
📊 Project Management: Agile Methodology
🔧 Optimization: Website Optimization
🛠️ Additional Tools: Git, Docker
Full Stack Development Deliverables:
🌐 Web Application Development
🔌 API Integration Services
🔧 Website Optimization for Peak Performance
💻 Desktop Application Development
📱 Responsive Design Implementation
🗃️ Database Development with Smart Contract Integration
🚀 Specialized in Blazor for Interactive Web Applications
I bring a passion for clean code, adept problem-solving, and a commitment to enhancing user experiences. My expertise spans from ERP and WMS to E-commerce and Mobile Apps, ensuring meticulous attention to detail in every project. Let's collaborate to turn your ideas into reality! ✨🚀
.NET Framework
JavaScript
SQL
C#
ASP.NET
jQuery
ASP.NET Web API
CSS
Azure DevOps
Database Design
Microsoft Azure
.NET Core
Saravanan G.
Chennai, India
$30/hr
5.0
17 jobs
🏆 𝗧𝗢𝗣 𝗥𝗔𝗧𝗘𝗗 5⭐ 𝗧𝗘𝗖𝗛𝗡𝗜𝗖𝗔𝗟 𝗔𝗥𝗖𝗛𝗜𝗧𝗘𝗖𝗧 & .𝗡𝗘𝗧 𝗘𝗫𝗣𝗘𝗥𝗧 🥇
⭐⭐⭐⭐⭐ Trusted to take ownership of complex, high-impact systems and deliver structured, production-grade solutions
⭐⭐⭐⭐⭐ Professional, communicative, and known for smart, effective problem-solving
I'm a Full Stack Developer and Technical Lead with strong experience in the .NET ecosystem, building secure, scalable apps for web, mobile, and desktop — from backend with .NET to frontend with Blazor, MAUI, and Angular🎖🎖🎖
🎯 𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 𝐁𝐞𝐬𝐭
✅ Backend Development
🔹.NET 10 / Classic .NET (4.8) Expert – High-performance backend systems on both modern and legacy .NET platforms.
🔹API Development & Integration – RESTful APIs with clean architecture, third-party integrations (payment gateways, CRM, logistics), and async background job processing.
🔹Database Design & Optimization – SQL Server schema design, data modelling, CRUD, indexing, and performance tuning.
🔹Entity Framework Integration – Efficient data access layers via EF Core, with complex queries, migrations, and relational mapping.
✅ Modern SaaS & Startup Stack
🔹Supabase Expert – Auth (multi-tenant/RBAC), Postgres schema design, RLS policies, and realtime subscriptions for fast-moving builds.
🔹Payment Gateways – Stripe & Razorpay integration: subscription billing, checkout flows, webhooks, and usage-based pricing.
🔹Transactional Email – Resend, SendGrid, Postmark, Mailgun for onboarding, notifications, and billing receipts.
🔹Rapid MVP-to-Production – Own a product from early architecture through to a live, paying-customer-ready platform.
✅ Universal App Development
🔹.NET MAUI Developer – Building cross-platform applications with a single codebase targeting Android, iOS, Windows, and macOS.
🔹Strong experience in delivering seamless mobile + desktop experiences through MAUI with native performance and responsive UI design.
✅ Cloud Development & DevOps
🔹Azure Solutions Architect – End-to-end experience with Azure App Services, Functions, Cosmos DB, Key Vault, Azure AD (OAuth2/OpenID), Blob Storage.
🔹CI/CD and DevOps – Automating deployments using Azure Pipelines and GitHub Actions, ensuring smooth rollouts with minimal or no downtime.
✅ Frontend & UI Engineering
🔹Experienced in developing dynamic and user-friendly web interfaces using ASP.NET MVC, Razor Pages, and Blazor.
🔹Skilled in building component-driven SPAs with Angular, integrating with RESTful APIs and backend systems.
🔹Proficient in responsive design principles using Bootstrap, CSS3, and JavaScript, ensuring smooth user experiences across devices.
✅ E-commerce API Integration
🔹 Integration of e-commerce platforms Shopify and WooCommerce with backend systems for product catalogs, order processing, and inventory management.
🔹 Integration of the label printing solution and barcode scanning app via Shopify API.
✅ Security-Focused Engineering
🔹Implementing secure coding standards, data encryption, secure authentication flows, API security, and access control across applications.
🔹Experienced with Azure AD, OAuth2, OpenID Connect, and role-based access controls in both web and mobile platforms.
✅ Legacy, Desktop & Cross-Era Engineering
🔹Legacy System Expert – Experienced in maintaining and upgrading systems built in VB6, VBS, WinForms, ASP Classic, WIN32 API, C and C++.
🔹Modern Desktop Engineering – WPF to MAUI migration, hybrid application architecture, and bridging old systems with modern APIs.
💼 𝐖𝐨𝐫𝐤 𝐄𝐭𝐡𝐢𝐜 𝐚𝐧𝐝 𝐀𝐩𝐩𝐫𝐨𝐚𝐜𝐡
🔷 I offer technical leadership, architectural insight, and end-to-end project ownership.
🔷I’ve worked with large financial companies and delivered clean, reliable, and high-quality code that meets strict standards.
🔷 Whether working independently, collaborating with cross-functional teams, or leading developers, I take full accountability for building clean, scalable, and secure systems.
🔷 I design robust architectures, write maintainable production-grade code, and ensure consistent communication from start to finish.
🔧 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐒𝐭𝐫𝐞𝐧𝐠𝐭𝐡𝐬 & 𝐂𝐨𝐫𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬
🔹 Languages & Frameworks
C#, VB.NET, ASP.NET Core, .NET 8, .NET MAUI, XAML, ASP.NET MVC, Blazor, WPF, WinForms, VB6, VBScript, C/C++, HTML5, JavaScript, TypeScript, Angular
🔹 Cloud Platforms & Services
Microsoft Azure (App Services, Functions, Blob Storage, Cosmos DB, Key Vault, Azure AD), RESTful Web APIs, WCF, IIS, OAuth2, OpenID Connect, Social Logins (Google, Microsoft, Facebook)
🔹 Databases
Microsoft SQL Server, Azure Cosmos DB, Supabase/Postgres, MySQL / MariaDB, Oracle
🔹 Messaging & System Integration
Apache Kafka, IBM MQ, RabbitMQ
🔹DevOps & CI/CD
Azure Pipelines, GitHub Actions
🔹 Security
Azure Active Directory, Role-Based Access Control (RBAC), OAuth2, OpenID Connect
.NET Framework
ASP.NET MVC
Angular
ASP.NET
ASP.NET Web API
Microsoft Azure
Visual Basic
XAML
Azure App Service
C#
VB.NET
API Development
SQL Programming
Database Design
Entity Framework
Ragavan G.
Chennai, India
$20/hr
4.9
55 jobs
• 14+ years of experience
• I work on backend, frontend, databases, and Linux server administration
• Main stack: .NET (C#) and TypeScript / JavaScript
• I build web and multi-platform desktop/mobile applications
📚 Technologies
• My main tech stack is .NET (C# or .NET) and TypeScript / JavaScript
• For .NET, I work with ASP .NET, Blazor, WPF, Windows Forms, MAUI (formerly Xamarin), Avalonia UI, and more
• For TypeScript / JavaScript, I prefer React, but I can also work with Angular, jQuery, or vanilla JS
🗼 Server Administration and DevOps
• Familiar with Debian-based Linux distributions like Ubuntu
• Able to handle VPS baremetal or Docker-based setups
• Able to automate workflows using Bash, Python, GitHub Actions, and similar tools
• Experienced with cloud services such as AWS and Azure
📊 Database
• Microsoft SQL Server
• MySQL / MariaDB
• SQLite
• PostgreSQL
• Microsoft Access
💡 Skills
• Strong in algorithm design and analysis
• Great ability to solve programming and system trouble
• Great at optimizing software performance
• Flexible work style
• Adaptive team player
📖 Self-Update
• I regularly study new technologies to stay up to date.
🕰️ Flexible Availability
• Open to collaborate across multiple time zones (US, CA, UK, EU, APAC, etc.)
✅ I’m not a robot.
• I’m a real human and a solo freelancer, not an agency
🙌 Let’s Connect!
• My name is Ragavan and I’d love to help bring your ideas to life
• Feel free to reach out so we can discuss how I can support your project
• Not a Vibe Coder, but use AI-Assisted Programming tools to solve problems
• Linus Torvalds once said, “Talk is cheap. Show me the code.” So go ahead and check out my GitHub code.
🛠️ Common Tasks and Roles
• Known as the Apple / macOS / iPhone guy
• Build Windows app with .NET Framework & Windows Forms (WinForms) / Windows Presentation Foundation (WPF) / WinUI / Avalonia UI / MAUI / Xamarin
• Build Windows Installer MSI / EXE from existing Windows App by using Wix / WixSharp
• Build macOS app with Swift UI or .NET & Avalonia UI / MAUI / Xamarin
• Build, sign, and notarize macOS app installer (PKG / DMG / ZIP)
• Build web app with ASP .NET & Blazor / React / Angular / Vanilla JavaScript
• Deploy and configure existing web apps by using Docker container to VPS / Cloud providers like AWS, Azure, or GCP
• Ethical decompile / reverse engineer / source code retrieval / deobfuscation of existing .NET EXE / DLL / MSI or NinjaTrader Trading Indicator / strategy
• Automate Windows UI tasks
• Web scraping to retrieve online data / PDF / Images / any other files
• Expert macOS system and app troubleshooting
🙋♂️ What I'm not
• 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.
.NET Framework
XAML
Xamarin
React Native
Microsoft Silverlight
UX & UI
ASP.NET Web API
Windows App Development
DevExpress
Universal Windows Platform
Microsoft Windows
C#
Entity Framework
Windows Presentation Foundation
Microsoft Visual Studio
Nabin S.
Chennai, India
$30/hr
4.5
55 jobs
Having over 15 + years of dynamic expertise, I specialize in crafting cutting-edge applications, ranging from Client/Server and MVC API to Rest API and Microservices., Mobile App, My proficiency extends to cloud environments, web servers, and N-Tier architectures, MVVM.
Development Focus:
I thrive on developing console applications, robust web services, and sophisticated web applications using the Microsoft Visual Studio .NET IDE. My commitment to quality is unwavering, backed by adeptness in Unit Testing, Code Review, and Source Control.
Industry Insight:
My broad industry knowledge enables me to tailor solutions that meet the unique demands of various business landscapes. Let's transform ideas into seamless, high-performance solutions together.
Technical Proficiency:
Microsoft Stack:
ASP.Net, C#.NET, .Net Core, MAUI
MVC API, Web API, WCF, WPF, MVVM
Languages:
C#, F# 4.5, T-SQL, LINQ, XAML, Xamarin
Web Technologies:
HTML, CSS, JavaScript, jQuery, Telerik Kendo UI
Mobile development:
Xamarin, MAUI
Testing & Assurance:
NUnit, Swagger, Postman, XUnit, Moq, Fluent Assertion
Code Excellence Tools:
FxCop, Resharper, Sonar Qube, Crucible
Databases:
SQL, MySQL, Oracle, AS 400, CouchDB, MongoDB, RavenDB
Cloud Platforms:
Azure, AWS
Development Tools:
Visual Studio .NET 2019, Visual Studio .NET 2022
Source Control:
GitHub, Bitbucket, SourceTree, TeamCity, JIRA
Collaborative Tools:
Figma, Jira, ClickUp
No-Code Tools:
Proficient in leveraging no-code platforms for efficient and rapid development
INDUSTRY KNOWLEGDE
* Artificial Intelligence (AI),
* Customer Relationship Management (CRM),
* Enterprise Resource Planning (ERP),
* Scheduling and Broadcasting,
* Manufacturing,
* Retail Marketing,
* Telecommunications,
* Insurance,
* Procurement,
* Banking and finance
API Integration
- DHL API
- Stripe API
- Authorize.Net
- Twillo API
- Microsoft Office 365 API / O365 API
- Gmail API
- Google API
- Google Maps API
- Amazon SP API
- TravelPort API (Hotel & Air, Car)
-MS Teams API (Graph API)
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