Hire the Best .NET Core Developers in Kolkata, IN

💼 Full Stack Developer | Microsoft Tech Stack Expert | 15+ Years Experience | MVP Awardee | Top Rated Hello! I’m Nitesh, a seasoned full-stack developer with over 15 years of experience in the Microsoft technology stack. I specialize in back-end development, front-end development, software architecture, and delivering end-to-end software solutions — from requirement analysis to deployment and support. 🏆 Key Highlights: 🏅 5-time recipient of the "Most Valuable Professional" (MVP) award by a top developer community. ✅ Microsoft Certified Professional – Windows Forms & ASP.NET. ⏱️ Over 3,800 Upwork hours delivered successfully. 🌟 Worked with Clients from over 40 countries. 💡 What I Offer: • Expert consultation on technical and financial aspects of projects. • Proactive approach with detailed options, pros/cons, and best-fit recommendations. • Bug fixing, code reviews, performance improvements, and full-cycle development. 🔧 Core Backend Expertise: • C#, VB.Net, ASP.Net, ASP.Net MVC • ASP.Net Core, ASP.Net Web Forms • Entity Framework, LINQ, ADO.NET • SQL Server, MySQL, PostgreSQL, MongoDB, Redis • RESTful APIs, Swagger, RestSharp 🎨 Frontend Technologies: • ReactJs, React Native • JavaScript, jQuery, jQuery UI • Bootstrap, HTML5, CSS3 🔌 Integration & Tools: • Payment Gateways: PayPal, Stripe, Razorpay, 2Checkout, CCAvenue, PayTM, PayU • Shipping APIs: FedEx, others • UI Libraries: Telerik, DevExpress, Infragistics • Dev Tools: Git, SVN, TFS • Time & Bug Tracking Systems • Webcam handling, e-signatures, 3rd party APIs 🧩 Types of Projects I've Built: • ERP for Manufacturing Companies • Custom CRM Softwares for over 50+ Customers • Inventory Management Software • Timesheet Management Solutions • Fixed Asset Management Solutions • Travel & Booking Apps 🎯 Why Work With Me? ✔ Delivered high-quality solutions for clients in healthcare, finance, e-commerce, manufacturing and more ✔ Clean, maintainable, and scalable code ✔ Strong communication – available daily via Upwork, Teams, or email ✔ Committed to deadlines, quality, and client success ✔ 99% on-time delivery since last 15 years ✅ Let’s Work Together I work with my clients as the project is mine giving 100% sense of accountability & ownership. 100% quality work and prompt response guaranteed. Message me now to discuss your next project. Quality work and prompt communication are guaranteed! #Full Stack developer, #backend developer, #ASP.NET Core, #WebAPI, C#, MS SQL, MySQL, ADO.NET, Micro services, Web development, UI/UX Designer, Entity Framework, SOAP, REST, ASP.NET, ASP.NET MVC, SignalR, WebRTC, HTML, CSS, JavaScript, JQuery, Angular, React, Blazor, Redis, Azure, AWS.

🏆 Accelerated 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 | 100% 𝐒𝐮𝐜𝐜𝐞𝐬𝐬 Rate | 𝐑𝐢𝐬𝐤 𝐅𝐫𝐞𝐞 𝐓𝐫𝐢𝐚𝐥 I help SaaS companies and enterprise teams build scalable, cloud-native applications using C#, .NET Core 8, ABP.io, ASP.NET Zero, and Azure. If you need a reliable architect-level developer who builds clean, high-performance systems or can rescue/upgrade an aging application, you’re in the right place. For over 10 years, I’ve delivered enterprise-grade platforms, multi-tenant SaaS products, mission-critical APIs, and comprehensive front-end ecosystems (Angular, React, Vue). I also specialize in modernizing legacy systems, including Classic ASP, .NET Framework, outdated monoliths, and poorly structured applications, into modern, modular, or microservice-ready .NET Core architectures using ABP.io and ASP.NET Zero. 𝑾𝒉𝒂𝒕 𝑰 𝑫𝒆𝒍𝒊𝒗𝒆𝒓: • SaaS platforms & enterprise back-ends (.NET Core 6/7/8, ABP.io, ASP.NET Zero) • Legacy modernization (Classic ASP → .NET Core, WebForms → Angular/React) • Cloud-ready deployments using Azure (App Services, Functions, SQL, DevOps CI/CD) • High-performance APIs & microservices • Front-end applications (Angular, React, Vue, Blazor) • Clean architecture, SOLID, secure authentication/authorization 𝑾𝒉𝒚 𝑪𝒍𝒊𝒆𝒏𝒕𝒔 𝑯𝒊𝒓𝒆 𝑴𝒆: • 22,000+ Upwork hours & 100% Job Success Rate • Clear communication, structured updates, and fast delivery • Deep expertise in complex enterprise workflows and large-scale systems • Clean, maintainable code that scales—no shortcuts, no fragile quick fixes If you’d like a dependable developer who can architect, build, or modernize your Dot NET/C# platform, let’s connect. Send me a message, and I’ll be happy to review your requirements. I even offer a risk-free initial consultation. 𝑻𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝑬𝒙𝒑𝒐𝒔𝒖𝒓𝒆: Top Skills (Primary): • .NET Core 8 • C# developer • ABP.io developer • ASP.NET Zero expert • SaaS platform development • Enterprise application development • Legacy modernization Classic ASP → .NET Core • Azure App Services • Azure Functions • Microservices architecture • Clean Architecture .NET • Angular developer (.NET backend) Secondary Skills (Use sparingly): • React developer • Vue.js developer • Blazor • Docker / Kubernetes • CI/CD Azure DevOps • SQL Server / PostgreSQL / MongoDB • REST APIs / GraphQL APIs • Multitenant SaaS • ABP commercial framework • ASP.NET Boilerplate

⭐ Top Rated Plus | $400K+ Earned | 23,000+ Hours | 100% Job Success I help businesses modernize and scale .NET applications — turning slow, hard-to-maintain legacy systems into fast, secure, scalable platforms, without a risky full rewrite. From ASP.NET Web Forms migrations to enterprise systems running 300GB+ databases, I specialize in the complex, business-critical work most developers avoid. Increasingly, clients bring me in for a second reason: they want AI capabilities — document intelligence, smart search, workflow automation — and their legacy system can't support them. I fix the foundation and build the AI on top. Over 14 years, I've delivered 89+ projects on Upwork with consistent 5-star results, including a 1,300+ hour engagement with a single client who kept coming back. What I bring to your project: 🔹 Legacy .NET Modernization — Migrating ASP.NET Web Forms & .NET Framework apps to ASP.NET Core / .NET 8, incrementally and without breaking what already works 🔹 SQL Server Performance Specialist — Complex queries, stored procedures, query optimization, and scaling databases to 300GB+ 🔹 AI Integration on Legacy Systems — Production OpenAI/LLM features: document intelligence, RAG search over your business data, OCR pipelines. Built on a modernized foundation, not bolted onto a fragile one 🔹 Full-Stack .NET Depth — ASP.NET (Web Forms, MVC, Core), C#, Web API/REST, Entity Framework, LINQ 🔹 Modern Front-End — React, Angular, Vue.js, Blazor, TypeScript, Tailwind, Bootstrap 🔹 Cloud & DevOps — Azure (primary), plus AWS & GCP experience, Azure DevOps, CI/CD pipelines, Git 🔹 Integrations — Payment systems (Stripe subscription billing for a healthcare platform), third-party APIs, MongoDB, CosmosDB Why clients rehire me: ✅ Clear, proactive communication (0–4 hour response time) ✅ Reliable availability in US time zones — I regularly work Eastern and Pacific hours ✅ Clean, maintainable, well-tested code ✅ Enterprise-standard code reviews, team leadership, and developer mentoring ✅ Solving hard problems — not just "making it work" Not sure where to start? I offer a fixed-fee, two-week Legacy Health Audit: your slowest queries analyzed, a risk map of your codebase, a phased modernization roadmap, and an AI-readiness assessment — so you know exactly what's wrong and what it will cost to fix, before you commit to anything. Whether you need a legacy system modernized, a SQL Server database that's buckling under load, AI features your current stack can't deliver, or a senior engineer to unblock your team — let's talk. Describe your application and I'll tell you specifically how I'd approach it. I'll respond within 4 hours.

I am an Electronics and Communication Engineer with over 12 years of experience in Industrial Electronics ,Product designs, PCB designs, Embedded Firmware codes on STM32 and ESP32, custom desktop applications to communicate with external hardware devices. I know the hardware and software part to make devices work. In my years of experience I have designed circuits like Smart Bicycle Tail light with light and speed sensor, RFID inventory application to track stocks, Bluetooth Enabled BLE asset tracker devices, etc. to name a few. I have a huge experience in developing native Windows Desktop Applications and my specialty is designing hardware devices which communicates with my Windows Desktop Apps. If you have a product concept, let me know - I will complete the idea and transform it from a prototype into a physical product.

WordPress & Shopify developer with 5+ years’ hands-on experience — fast fixes, theme customization, Elementor & Liquid, and conversion-focused pages. Hi, I’m Subhankar, a WordPress and Shopify expert. I specialize in building and customizing websites: on WordPress (using Elementor, custom themes, plugins, PHP) and Shopify (theme design with Liquid, HTML/CSS/JS, app integrations). I troubleshoot errors, optimize site performance, and add new features quickly. Clients appreciate that I deliver high-quality work on time. Here’s how I can help you: ✅ WordPress Development: Custom Elementor designs, responsive themes, plugin/custom code integration, SEO optimizations. ✅ Shopify Stores: Theme customization, Liquid programming, custom checkout solutions, payment gateway setup. ✅ Site Maintenance & Support: Fix bugs/errors, speed optimizations, page additions, and ongoing updates. I always ensure clear communication and 100% satisfaction. Let’s discuss your project – I’m ready to start!

Over 15+ years of experience has built a reputation for scaling customer expectations. I provide round-the-clock connectivity and services to clients in different verticals like Edtech, Guard Patrol, Field Service, ERP, CRM, POS, Healthcare, Transportation, CMS, E-Commerce, Business Automation & different IT services. Specialized on ASP.Net and Microsoft Power Platform ★★ Tech Stack Expertise ★★ ✅ Framework: ASPNET Boilerplate, ASPNET ZERO, ABP Framework, ABP.IO, Strapi ✅ Integration with Microsoft Power Platform like Power BI, Power Automate, 365, etc. ✅ Seamless Integration with Office/Microsoft 365 Apps (SharePoint, OneDrive, Teams, Outlook, Planner, Excel, Bookings) using standard connectors and Microsoft Graph API. ✅ Backend: .NET & .NET Core, C#, VB.NET, Web API, NodeJS, PHP, Laravel, Python, Django ✅ Frontend: .NET MAUI, ASP.NET MVC, ASP.NET Web Forms, Angular, React, TypeScript, Laravel ✅ Cross-Platform Framework: .NET MAUI, Xamarin Flutter, React Native ✅ Database: SQL Server, MySQL, Oracle, MongoDB, PostgreSQL, Firebase ✅ Cloud Service: MS Azure, AWS, Google Cloud ✅ DevOps: CI/CD Pipelines, Kubernetes, Docker, Github Repos, Test Plan, Build Strategy, Artifacts with Python & Nuget Package feeds, etc. ✅ Source Control: Github, GitLab, Bitbucket, TFS ✅Experience working with 90+ Prebuilt (both Standard and Premium) and Custom Connectors. ★★ Service Areas ★★ ✔ Web Development: Custom Web application, Website Design & Development, Web Portal Development, API Development & Integration, Ecommerce Development, Maintenance & Support, UI/UX Design ✔ Mobile App Development: App UI/UX Design, Custom Native & Cross Platform App Development, App Maintenance, App Migration & Update ✔ SaaS & MVP Developement ✔ Dedicated hiring with up to 70% less price Additional: ✅ Custom AI Models ✅ Integrating Power Apps seamlessly with Microsoft Dynamics 365. ✅ Migrating data to Microsoft Dataverse or Business Central. ★★ Key Achievements ★★ ✅ 100% Job Success Rate on Upwork. ✅ 300+ 5 Star(*) reviews on Upwork. ✅ Certified 'Top Rated Plus’ on Upwork ✅ Team delivered 1, 10, 000+ hours of work on Upwork ✅ Accredited 'MOST TRUSTED IT ENTERPRISES IN INDIA 2022' ✅ 30+ SaaS Application, 200+ Enterprise Application, 150+ Mobile App Delivered ★★ We are 'Exceptional' & make sure ' Guaranteed Delivery ' ! ★★ ✅ Work with India’s top 1% of developers ✅ Save development costs up to 70%. ✅ Direct access, communication, and work with dedicated developers. ✅ Free Quality Assurance & Testing to make sure accurate delivery ✅ Free UI/UX design support ✅ We follow 'Business Continuity Plan' to guarantee seamless delivery ✅ Unlimited after-delivery support ✅ We take 100% ownership of delivery