Hire the Best .NET Core Developers

I help companies migrate Xamarin applications to .NET MAUI, fix difficult ASP.NET Core issues, and rescue legacy .NET systems that other developers struggle to stabilize. Clients usually hire me when: • A Xamarin → .NET MAUI migration is failing or incomplete • An ASP.NET Core backend issue has remained unresolved • Performance problems are slowing down production systems • A legacy .NET application needs modernization without downtime • A desktop/mobile system requires reliable long-term architecture Recent work includes: • Migrating production Xamarin apps to .NET MAUI • Resolving long-standing ASP.NET Core issues unresolved by previous freelancers • Building high-performance middleware for machine communication • Developing POS and enterprise systems using ASP.NET Core, Blazor, and WPF I focus on fast diagnosis, maintainable architecture, and reliable delivery with minimal hand-holding. Core Expertise: • .NET MAUI & Xamarin Migration • ASP.NET Core MVC / Web API • Blazor & Enterprise Web Applications • WPF Desktop Applications • SQL Server Optimization & Entity Framework Core • REST APIs & Backend Architecture • Middleware & Hardware Communication Systems • Performance Optimization & Debugging Technical Stack: C#, .NET MAUI, Xamarin, ASP.NET Core, Blazor, WPF, Entity Framework Core, SQL Server, SignalR, REST APIs, Azure App Services, Web API, JavaScript Currently working full-time on enterprise ASP.NET Core systems, REST APIs, SQL optimization, and large-scale .NET applications. I communicate clearly, work independently, and write clean, scalable code designed for long-term maintainability.

If your .NET system is slow, breaking under load, or needs a React or Node.js frontend built right - I have solved that exact problem 50+ times. 50+ completed jobs. 100% Job Success Score. $100K+ earned. Top Rated Plus since 2021. You work directly with me - not a team you've never met. ──────────────────────────────── WHAT I DELIVER ──────────────────────────────── ✔ ASP.NET Core & C# backend - enterprise APIs, microservices, clean architecture ✔ React.js & Next.js frontend - SaaS dashboards, portals, admin panels ✔ Angular development - v6 to v18, enterprise dashboards, complex SPAs ✔ Node.js backend - REST APIs, Express.js, real-time systems, WebSockets ✔ FastAPI & Python backend - async APIs, AI integrations, data pipelines ✔ .NET modernization - legacy .NET Framework to ASP.NET Core cloud- native ✔ Azure & AWS cloud - App Services, Functions, EC2, S3, Lambda, DevOps ✔ Full stack .NET + React - end to end, architecture to production ✔ SaaS development - multi-tenant, subscriptions, RBAC, billing systems ✔ AI/ML integration - OpenAI API, Python, TensorFlow, FastAPI, Scikit-learn ✔ Database architecture - SQL Server, PostgreSQL, MongoDB, CosmosDB, Redis ✔ CI/CD pipelines - Azure DevOps, GitHub Actions, Docker, Kubernetes ✔ Third party integrations - Stripe, Salesforce, DocuSign, Twilio, Google APIs ──────────────────────────────── LIVE PROJECTS DELIVERED ──────────────────────────────── ✔ Immigration Consultation Marketplace - multi-role platform with .NET + Angular + React, full stack architecture ✔ Ontrack Careers - AI mentorship platform with booking engine, scheduling, and OpenAI integration ✔ Rose POS - enterprise restaurant kiosk with shift-based cash tracking and Stripe payment flows ✔ Raprod - B2B manufacturing marketplace with real-time bidding engine, React + Node.js ✔ Ninja DAM - multi-user digital asset management SaaS, React + Node.js + AWS ✔ Acemmi - AI interview coaching platform with scoring pipeline, OpenAI API + React + Node.js ✔ Promo Standards SOAP API - enterprise-grade integration, .NET + C#, 500+ hours delivered ✔ Stripe Payment Integration - .NET MAUI enterprise mobile application, end to end ──────────────────────────────── TECH STACK ──────────────────────────────── BACKEND C# · ASP.NET Core · .NET Core · .NET 8 · Web API · Entity Framework · Node.js · Express.js · FastAPI · Python · GraphQL · Microservices · SignalR FRONTEND React.js · Next.js · Angular v6–v18 · TypeScript · JavaScript ES6+ · Tailwind CSS · Redux · Material UI DATABASE SQL Server · PostgreSQL · MongoDB · MySQL · CosmosDB · DynamoDB · Redis CLOUD & DEVOPS Azure App Services · Azure Functions · Azure DevOps · AWS EC2 · S3 · Lambda · RDS · Docker · Kubernetes · CI/CD · GitHub Actions · Linux AI & ML Python · TensorFlow · Scikit-learn · FastAPI · OpenAI API · Predictive Analytics INTEGRATIONS Stripe · Salesforce · DocuSign · Twilio · SendGrid · Google APIs · SOAP APIs · Webhooks · REST APIs SPECIALIZATIONS ASP.NET Core Developer · C# Developer · .NET Core Developer · Full Stack .NET Developer · React Developer · Angular Developer · Node.js Developer · Azure Developer · SQL Server Developer · Entity Framework Developer · SaaS Developer · Enterprise Developer · Legacy Migration Developer · Microservices Developer · REST API Developer ──────────────────────────────── WHY CLIENTS CHOOSE ME ──────────────────────────────── ✔ 100% Job Success Score - 49 completed jobs, Top Rated since 2021 ✔ Proactive communication at every milestone - clients never chase me for updates ✔ I find the real problem, not just the reported one - root cause fixes that prevent future issues ✔ Architecture decisions that save expensive rewrites at scale ✔ Available and responsive - fast turnaround, clear timelines, no surprises ✔ You work directly with me - no handoffs, no juniors ──────────────────────────────── READY TO START? ──────────────────────────────── Share your project. I'll review it and tell you exactly what I'd build, how long it takes, and what it costs. Senior .NET Developer · Full Stack .NET Developer · ASP.NET Core Developer · ASP.NET MVC Developer · C# Developer · .NET Core Developer · .NET Backend Developer · REST API Developer · Microservices Developer · Enterprise Application Developer · SaaS Developer · Azure .NET Developer · Cloud Application Developer · Legacy Migration Developer

Most developers write code. I build systems that don’t break when your business grows. I help businesses build scalable SaaS applications and multi-tenant systems using ASP.NET Core — designed for performance, security, and long-term stability. When your .NET project needs to work — and keep working — I’m the developer you bring in. With 10+ years of experience in the Microsoft ecosystem, I specialize in designing and building complex systems where architecture matters as much as code. My core expertise: Multi-tenant SaaS applications (secure tenant isolation, scalable architecture) ERP / LMS / business management systems Custom authentication & role-based authorization systems ASP.NET Core migrations and performance optimization I build: Scalable web apps using ASP.NET Core, Blazor, and MVC Secure REST APIs and third-party integrations Cloud-ready applications with clean architecture Full-stack solutions when needed (Blazor WASM, Blazor Server) Stack: ASP.NET Core, C#, Entity Framework, SQL Server, My Sql, PostgreSQL, Azure, AWS, Docker I’ve completed 70+ projects on Upwork with a 100% Job Success Score, mostly involving complex systems and long-term client relationships. If you’re building a serious product and need it done right — let’s talk. I’m happy to review your requirements and suggest the best approach before we start.

I help businesses build 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲, 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲, and 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻-𝗵𝗲𝗮𝘃𝘆 systems using .𝗡𝗘𝗧 and 𝗔𝘇𝘂𝗿𝗲 and I leverage 𝗔𝗜 𝗮𝘀𝘀𝗶𝘀𝘁𝗲𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 to deliver faster, smarter, and with fewer bottlenecks. With 17+ years of experience, I have delivered long-term solutions using .NET, ASP.NET Core, and Web APIs with 100% job success, working with international clients including Fortune 500 companies like Tractor Supply. ✔Core Expertise 🔹ASP.NET Core / .NET / C# / Web APIs (REST & SOAP) 🔹Azure Functions & cloud-based architectures 🔹MS SQL Server, Entity Framework, Supabase, Pinecone 🔹Angular (for full-stack solutions) 🔹Next.js 🔹Full Stack Development 🔹n8n Automation 🔹AI Assisted Development 🔹Microservices & scalable system design 🔹System Integrations (Salesforce, CommerceHub, Deposco, RingCentral) ✔ What I’ve Delivered 🔹Built scalable ASP.NET Core Web APIs handling complex business logic 🔹Developed admin panels & backend systems for eCommerce, Franchise Management and entrprise workflows) 🔹Designed autoship and subscription systems with full lifecycle handling 🔹Integrated payment gateways (tokenization, capture, refunds) 🔹Connected warehouse & fulfillment systems (Deposco) 🔹Automated business workflows using Azure Functions ✔ Experience Highlights 🔹Worked with Tractor Supply (Fortune 500 company), Allivet and Edible Arrangements 🔹Delivered solutions across eCommerce, Franchise Management, Lead Management, Training & compliance systems ✔ What You Can Expect 🔹Clean, scalable, .Net architecture 🔹Strong ownership (I don’t just code, I solve problems) 🔹Clear communication and reliable delivery 🔹Ability to lead or work independently If you're looking for a Senior .NET developer who can handle complex systems and integrations, let’s talk.

I help businesses build scalable, high‑performance, and maintainable web applications using .NET, ASP.NET Core, Angular, and Azure. With 10+ years of experience in full‑stack development, backend architecture, REST API development, and cloud deployment, I focus on delivering solutions that are clean, reliable, and built for long‑term growth. My core expertise includes: - .NET and ASP.NET Core development - Angular front‑end development - RESTful API design and integration - Azure cloud services and deployment - SQL Server database design and optimization - Legacy system modernization - SaaS and enterprise application development I have worked on enterprise web applications, microservice‑based solutions, and performance‑focused systems where scalability, security, and maintainability matter most. If you need a Senior .NET Full Stack Developer who understands both technical execution and business impact, I can help turn your requirements into a solid product.

🌟 Senior Full-Stack Engineer & Solution Architect | .NET, React, Azure | AI-Assisted Development 💬 “Nitin is an exceptional developer with deep architectural insight—delivers efficient, scalable solutions and communicates complex ideas clearly.” — Dhwani K., BCG 👋 Hi there, thank you for checking out my profile! I’m Nitin, a Senior Full-Stack Engineer (11+ years) helping businesses modernize legacy systems, ship modern React frontends, and build secure .NET + Azure backends—always with a strong architectural foundation and future-ready design. I’ve delivered projects for Microsoft, BCG, Harman, Nagarro, Digital Juice, BusyBoxx, Lutron, McCarthy & Vaughn, and MROCorp across industries including healthcare, airlines, lighting/IoT, construction, and e-commerce. ✨ My differentiator: I combine proven engineering practices with AI-assisted development (Copilot, ChatGPT, Cursor) to accelerate productivity, improve documentation, and deliver enterprise-ready solutions faster. ✅ What I Do (Full-Stack End-to-End) ⚛️ Frontend Engineering → Responsive UIs with React, TypeScript, MUI5, Tailwind, TanStack (Query, Table, Virtual), and advanced charting. Migrated old ASP.NET/Angular apps to React/Angular latest with better performance and usability. 🖥️ Backend & APIs → Robust .NET 6/8 Web APIs, EF Core, Dapper, SQL Server—modular, secure, and scalable. Skilled with microservices and modular monolith architectures. 🗄️ Database & Search → Expertise in SQL Server, MongoDB, Elasticsearch, Redis for high-performance queries and intelligent search features. ☁️ Cloud & DevOps → Deployments on Azure App Services, AKS with Pods, IIS, Docker, CI/CD pipelines. Focused on secure, observable, and highly available systems. 🔐 Identity & Security → Migrated legacy ASP.NET/custom auth to OpenID Connect / OAuth 2.0 / JWT with ASP.NET Identity. Implemented RBAC and SSO-ready solutions. ⚡ AI-Driven Productivity → Leveraging Copilot, ChatGPT, Cursor AI to accelerate development, streamline testing/documentation, and deliver enterprise-ready solutions faster. 🚀 Recent Highlights 🏗️ McCarthy Vaughn Constructions → Delivered Safety Audit & Leadership Engagement modules with React + .NET 8 + SQL Server. Migrated from ASP.NET WebForms to modern stacks, deployed on Azure, and implemented reporting, user management, and authentication modernization. 💡 Lutron (Lighting & IoT) → Migrated legacy .NET Framework & Angular apps to React, Angular latest, and .NET 8 with a microservice architecture and secure token-based authentication. ✈️ Airlines (BCG) → Built shared libraries and data-heavy React UIs (ZBN, Pathfinder, Sentry) for real-time operations and disruption management. 🖊️ Microsoft (Virtuoso) → Designed a dynamic UI framework rendering configurable screens from JSON, added SQI/RAID/review workflows, and deployed to Azure cloud-native environments. 🛒 E-commerce (Digital Juice/BusyBoxx) → Delivered Elasticsearch + Redis search/admin tools, boosting content discovery and reducing infrastructure costs. 🏥 Healthcare (MROCorp, Nagarro) → Architected HIPAA-compliant APIs, audit logging, and modernization strategies for enterprise-grade healthcare applications. 🛠 Tech Stack (Keywords) Frontend: ⚛️ React, TypeScript, MUI5, Tailwind, TanStack, Charting, Angular Backend: 🖥️ .NET 6/8, .NET Framework, C#, EF Core, Dapper, Node.js/Fastify Cloud/DevOps: ☁️ Azure App Services, AKS with Pods, Service Bus, APIM, Functions, IIS, Docker, CI/CD Databases: 🗄️ SQL Server, MongoDB, Elasticsearch, Redis Architecture: 🏗️ Clean Architecture, Microservices, Modular Monolith, Caching, Telemetry, Secure Auth Domains: ✈️ Healthcare, Airlines, Construction, Lighting/IoT, E-commerce, Media 💼 Why Work With Me? ✔️ 11+ years delivering enterprise-grade solutions across industries ✔️ Proven expertise in legacy → modern migration (.NET Framework → .NET 8, Angular/ASP.NET → React/Angular latest) ✔️ Cloud-native delivery across Azure App Services, AKS, IIS, and Docker ✔️ Strong foundation in architecture, scalability, security, and compliance ✔️ Endorsed with LinkedIn recommendations highlighting technical excellence & leadership 📞 Let’s Connect If you’re looking for a full-stack partner who can modernize legacy systems, build new cloud-native applications, and deliver with AI-enhanced speed and precision, let’s talk. I’ll propose a clear, phased plan tailored to your project and business goals. Best Regards, Nitin R