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Dhanush Kumar

Hi, I'm Dhanush

Full-stack developer crafting web applications with React, Node.js, and PHP. I design systems that scale, automate workflows that save time, and ship code that works in production.

React / Node.js / PHP / SQL / DevOps

I build end-to-end web solutions that solve real problems

I'm a full-stack developer focused on building practical, production-ready applications. I work with React on the frontend, Node.js and PHP on the backend, and SQL for data.

Beyond development, I've managed CRM platforms end-to-end — configuring workflows for quotations, billing, email campaigns, and WhatsApp messaging. I approach automation pragmatically: if a task repeats, I script it.

On the infrastructure side, I use GitHub Actions for CI/CD, Docker for containerization, and have experience deploying on AWS and Google Cloud.

Core Capabilities

Frontend Development

React, responsive interfaces, component architecture

Backend Engineering

Node.js, PHP, REST APIs, SQL database design

Business Automation

CRM workflows, email pipelines, messaging integrations

Infrastructure & DevOps

CI/CD pipelines, Docker, cloud deployment, hosting

Technologies I work with

A practical stack for building, shipping, and maintaining web applications.

Frontend

React Tailwind JavaScript Responsive

Backend

Node.js PHP REST APIs MySQL

Automation

Email WhatsApp CRM Webhooks

DevOps

GitHub Actions Docker AWS GCP

Professional background

Present

Full-Stack Developer

Freelance

Building web applications with React, Node.js, PHP, and SQL. Managing CRM systems with automated quotation, billing, and communication workflows. Implementing CI/CD pipelines and managing hosting infrastructure for client deployments.

2025

CRM Operations & Automation

Business Systems

Managed full CRM lifecycle including lead management, quotation generation, and billing automation. Built email and WhatsApp notification systems, reducing manual follow-ups significantly. Integrated API connections and webhooks for seamless data flow.

2024

Junior Developer

Independent Projects

Built full-stack applications from the ground up — authentication, CRUD systems, and database architecture. Gained hands-on experience with Docker, CI/CD workflows, and cloud platforms including AWS and Google Cloud.

Selected work

📊

CRM Platform

End-to-end CRM with lead tracking, quotation and billing automation, email campaigns, and WhatsApp integration for business communication.

PHP SQL API
🤖

Messaging Automation

Automated notification system integrating WhatsApp and email with CRM data for scheduled messaging, alerts, and delivery tracking.

Node.js Webhooks Automation
📧

Email Pipeline

Transactional email system with templating, scheduling, and analytics — integrated with CRM workflows for automated client communication.

PHP SMTP Automation
💰

Quotation & Billing System

Automated invoice generation and payment tracking with CRM integration, email delivery, and WhatsApp payment reminders.

PHP SQL Node.js

CI/CD Toolchain

Reusable GitHub Actions workflows for automated testing, multi-environment builds, and Docker-based deployments to staging and production.

GitHub Actions Docker YAML
🌐

Portfolio — dk.dev

This portfolio — a minimal, responsive site built with vanilla HTML, Tailwind, and CSS. Designed for performance and clarity.

HTML Tailwind CSS

Let's work together

Have a project in mind or just want to connect? Send me a message and I'll get back to you.