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senthilragu

Senthilnathan R

@senthilragu

Full Stack Developer building AI powered web apps, SaaS MVPs with MERN Stack

India
English, Tamil
About me
Hi, I'm Senthilnathan, a Full Stack Developer specializing in the MERN stack (React, Node.js, MongoDB, Express), focused on AI-powered web apps and SaaS MVPs. I help founders turn ideas into working products: AI-integrated features (LLM tools using OpenAI's API), secure auth, REST APIs, and responsive React frontends. I also fix bugs and boost performance on existing codebases. My focus: clean, secure code and clear communication. Whether it's a quick fix or a full MVP, I aim to ship something that works, on time. Message me with your project happy to discuss scope.... Read more

Skills

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senthilragu
Senthilnathan R
Offline • 
Average response time: 1 hour

See my services

Custom Websites
I will develop a scalable saas or custom full stack web application
From$80 / projectMore details
Bug Fixes
I will fix bugs in your react, next js, or node js web app fast
From$15 / projectMore details

Portfolio

Work experience

Fiverr

Full Stack Web Developer

Fiverr • Freelance

Mar 2026 - Present • 5 mos

Full Stack MERN Developer specializing in building scalable, secure, AI-powered web applications and SaaS MVPs. Experienced in developing responsive user interfaces, RESTful APIs, authentication systems, LLM integrated features, and database driven applications using React.js, Node.js, Express.js, and MongoDB. Focused on delivering production ready solutions with clean architecture, performance optimization, and modern development practices. Portfolio : https://senthilragu-zeta.vercel.app/ KEY RESPONSIBILITIES & ACHIEVEMENTS: ► Developed and deployed end to end full-stack web applications using React.js, Node.js, Express.js, and MongoDB managing the full lifecycle from requirements and architecture design to deployment and ongoing enhancement. ► Integrated OpenAI's API to build an AI-powered component generator, converting natural language prompts into production ready JSX/Tailwind code with live rendering bringing AI capabilities directly into the product layer. ► Engineered secure backend infrastructures with JWT authentication, password hashing, role based access control, protected routes, and API validation for reliable user management and data protection. ► Designed scalable RESTful APIs, business logic layers, and database architectures supporting authentication, user management, e-commerce workflows, and frontend-backend communication. ► Built responsive, reusable UIs with React.js and Tailwind CSS, optimizing performance via efficient state management, lazy loading, code splitting, and database query improvements. ► Used Git, GitHub, Docker, Postman, and CI/CD workflows under Agile methodologies to deliver maintainable, production ready software. CORE TECHNOLOGIES: React.js, Node.js, Express.js, MongoDB, JavaScript (ES6+), TypeScript, Tailwind CSS, REST APIs, JWT Authentication, OpenAI API, Git, GitHub, Docker, CI/CD, Postman, MySQL.