Amandeep Singh K.

I’m a Full Stack Developer with 7+ years of experience building scalable, secure, and high-performance web applications using React.js, Node.js, NestJS, and the MERN stack. I help businesses build new applications, improve existing systems, and turn complex requirements into reliable software solutions. My experience covers SaaS platforms, marketplaces, e-commerce, fintech, healthcare, education, and custom business applications. 🚀 MY CORE EXPERTISE 🔹 React.js & Frontend Development Build responsive and interactive web applications using React.js. Develop reusable components, dashboards, admin panels, and customer portals. Use Next.js and TypeScript to build modern, maintainable frontend applications. Improve frontend performance, code quality, and user experience. Work with Tailwind CSS, Bootstrap, Material UI (MUI), and modern UI libraries. 🔹 Node.js & Backend Development Develop backend services and REST APIs using Node.js and Express.js. Build modular, maintainable backend applications using NestJS. Implement business logic, authentication, authorization, and role-based access. Integrate databases, payment gateways, and third-party APIs. Improve API performance, reliability, security, and maintainability. 🔹 MERN Stack Development Build complete web applications using MongoDB, Express.js, React.js, and Node.js. Develop applications from frontend to backend, database, and deployment. Create SaaS platforms, marketplaces, e-commerce systems, and business dashboards. Integrate third-party services and implement custom business workflows. Extend existing MERN applications with new features and improvements. 🔹 NestJS Application Development Develop structured backend applications using NestJS and Node.js. Organize business logic into reusable modules and services. Build APIs that connect React.js and Next.js frontends with backend systems. Integrate PostgreSQL, MongoDB, authentication systems, and external services. Design maintainable backend architectures for growing applications. 💼 PROJECTS & INDUSTRY EXPERIENCE 🔹 SaaS Platforms & Custom Business Applications Develop SaaS applications using React.js, Node.js, NestJS, and PostgreSQL. Build user management, role-based access, dashboards, and business workflows. Design modular architectures that support future features and integrations. Develop REST APIs and connect multiple services into a unified application. 🔹 E-commerce & Marketplace Development Build e-commerce and marketplace applications using the MERN stack. Use React.js and Next.js for product listings, search, filtering, and customer interfaces. Develop Node.js backend services for application logic and data processing. Integrate Stripe and other payment APIs. Create administrative dashboards for managing users, products, and transactions. 🔹 Fintech & Loan Applications Develop financial applications using React.js, Node.js, and database technologies. Implement application workflows, data validation, and secure API integrations. Integrate payment services and third-party financial APIs. Support business-specific calculations, reporting, and dashboard requirements. 🔹 Healthcare & Data Management Build healthcare interfaces and data management dashboards using React.js. Develop backend APIs using Node.js and Express.js. Integrate SQL databases and external systems. Support structured data processing, reporting, and operational workflows. 🔹 Education, LMS & Property Management Develop learning management systems and educational platforms. Build property management portals, dashboards, and custom business modules. Use React.js, Angular, Node.js, MongoDB, PostgreSQL, and SQL Server as required. Integrate APIs, user permissions, and data-driven business functionality. ⚙️ MY DEVELOPMENT APPROACH I focus on understanding your business requirements before selecting the right technical approach. Requirement Analysis: Understand your goals, workflows, existing architecture, and technical challenges. Architecture Planning: Select the right stack, whether React.js with Node.js, a MERN application, or a NestJS backend. Development: Build reusable React components, structured backend services, and reliable database integrations. API Integration: Connect frontend applications with backend APIs, payment gateways, and external services. Code Quality: Focus on clean code, maintainability, security, testing, and performance. Optimization: Troubleshoot issues, refactor existing code, and improve application reliability. Deployment: Deploy applications using AWS, Azure, Docker, and appropriate CI/CD workflows. I also use AI-assisted development tools such as Cursor, Claude, and GitHub Copilot. Whether you're starting a new project, building an MVP, adding features to an existing application, or improving your backend architecture, I can help you move forward with a practical and maintainable solution. Let's discuss your requirements.