Full-Stack Developer | Backend-Focused | TypeScript / Node.js

I build full-stack web applications with a focus on backend engineering, clean architecture, API design, and reliable application workflows.

My current focus is on production-oriented backend development, including concurrency, distributed systems, event-driven architecture, databases, caching, observability, and cloud deployment.

• B.Tech in Electronics and Communication Engineering from TKM College of Engineering
• Full-stack development experience with React, Next.js, Node.js, and Express
• Backend development using TypeScript, PostgreSQL, MongoDB, Redis, and FastAPI
• Experience with Docker, AWS, Nginx, GitHub Actions, and CI/CD
• Interested in distributed systems, system design, concurrency, and backend architecture
• Exploring LLM applications, RAG, LangChain, and AI agents
• 240+ DSA problems solved

Languages

JavaScript · TypeScript · Python · SQL

Frontend

React · Next.js · Redux Toolkit · Tailwind CSS · Axios

Backend

Node.js · Express.js · FastAPI · REST APIs · Socket.IO

Databases

PostgreSQL · MongoDB · Redis

Architecture

Clean Architecture · SOLID · Repository Pattern · MVC · RBAC

Security

JWT · OAuth · Authentication · Authorization · Rate Limiting

Infrastructure

Docker · AWS EC2 · AWS S3 · Nginx · GitHub Actions · Git

Payments

Stripe · Razorpay

AI

Gemini API · LangChain · RAG · Function Calling · AI Agents

A full-stack service marketplace for customers, vendors, and administrators.

Key engineering work

• Designed the backend using Clean Architecture and SOLID principles.
• Implemented Redis TTL-based distributed locking to protect booking operations from concurrent requests.
• Added geospatial provider discovery using MongoDB 2dsphere indexes.
• Implemented real-time chat, notifications, and booking updates using Socket.IO.
• Integrated Stripe payments and Google OAuth authentication.
• Added WebRTC video calling.
• Integrated a LangChain-based AI chatbot.
• Containerized the application with Docker and deployed the backend to AWS EC2.
• Implemented CI/CD using GitHub Actions.

Repositories: Frontend · Backend

Live: https://www.fixoraservice.online/

A MERN-based e-commerce application with customer and administrative workflows.

Key engineering work

• Implemented authentication using JWT and Google OAuth.
• Designed role-based access control for administrative operations.
• Implemented product, category, cart, and order workflows.
• Integrated Razorpay payment processing.
• Built an administrative dashboard for product and order management.
• Deployed the backend using AWS EC2 and the frontend using Vercel.

Repositories: Frontend · Backend

Live: htttps://oceanoflaptops.store

A full-stack conversational AI application built around the Gemini API.

Key engineering work

• React and TypeScript frontend with a Node.js and Express backend.
• Implemented Gemini function calling with backend tools.
• Connected tools to MongoDB for retrieving application data.
• Implemented conversation history and contextual responses.
• Added API rate limiting.
• Implemented a backend tool-execution loop.

Repository

A full-stack PDF processing application designed using Clean Architecture.

Key engineering work

• Separated presentation, application, domain, and infrastructure layers.
• Implemented PDF uploads using Multer.
• Integrated Cloudinary for cloud storage.
• Added API validation and structured error handling.
• Built a modular React frontend.

Repositories: Frontend · Backend

Live: https://pdf-extractor-application-client.vercel.app/

A full-stack product platform consisting of customer, backend, and administration applications.

Key engineering work

• Built the application using React, Node.js, Express, and MongoDB.
• Implemented product and category management.
• Developed customer-facing product workflows.
• Built an administrative dashboard.
• Maintained separate client, API, and admin applications.

Repositories: Client · API · Admin

A FastAPI service for validating structured CSV and JSON datasets.

Key engineering work

• Built validation APIs using FastAPI and Pydantic.
• Used Pandas for structured dataset processing.
• Implemented validation for required fields, empty values, duplicates, and prompt-length constraints.
• Generated structured validation reports.
• Added automated tests using Pytest.

Repository

I am currently focusing on the engineering problems that appear when applications move beyond simple CRUD systems:

• Concurrency control
• Database transactions and consistency
• Redis and caching strategies
• RabbitMQ and asynchronous processing
• Event-driven architecture
• Idempotent consumers
• Outbox pattern
• Retry and dead-letter strategies
• Distributed systems
• API reliability
• Observability
• Docker and Kubernetes
• AWS infrastructure

240+ LeetCode problems solved

Primary areas:

Arrays · Hashing · Recursion · Trees · Graphs · Heaps

LeetCode

Launch Vehicle Integrated Health Management System Model

International Research Journal of Advanced Science Hub (IRJASH), March 2024.

Publication / DOI

TKM College of Engineering, Kollam

B.Tech in Electronics and Communication Engineering 2020–2024 · CGPA: 7.7

Email: yonadhan.mm.dev@gmail.com

LinkedIn: linkedin.com/in/yonadhanmm

GitHub: github.com/YONADHAN