Hi, I'm Dhiraj Roy 👋

Building Scalable Backend Systems & Modern Full-Stack Applications

I develop secure, scalable, and production-ready software using Java, Spring Boot, Laravel, Node.js, React, Flutter, PostgreSQL, MySQL, and MongoDB. I build complete business solutions from backend architecture to responsive user interfaces.

100+ DSA Problems Solved
10+ Full-Stack & Backend Apps
3+ Database Engines
Dhiraj Roy - Backend Engineer & Full-Stack Developer

Categorized Tech Stack

A breakdown of the tools and technologies I use to build robust software systems

Backend

Java Spring Boot Spring Security PHP Laravel Node.js Express

Frontend

React HTML5 CSS3 / Vanilla CSS JavaScript (ES6+) Bootstrap

Mobile

Flutter Dart React Native

Database

PostgreSQL MySQL MongoDB Redis

DevOps

Docker Git & GitHub CI/CD Workflows Linux CLI

Automation

n8n Workflows CRM Integrations Webhook APIs REST APIs
About Dhiraj Roy

About Me

I am a B.Tech Computer Science graduate currently working at PPN Solutions Pvt. Ltd. as a developer (since May 2026). I focus on bridging business requirements with clean, scalable software implementations. Rather than just writing lines of code, I focus on system reliability, optimized database architectures, and intuitive web interfaces.

Whether it's designing secure RESTful API integrations, automating complex data synchronization processes, or building full-stack platforms, I ensure each feature contributes directly to a seamless user experience and solid business logic.

2+ Years of Development
15+ Projects Deployed
99.9% System Reliability
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What I Do

Reliable, scalable, and optimized engineering solutions to power your business systems

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Backend Development

High-performance logic and servers using Java/Spring Boot, Laravel, and Node.js. Optimized for security and transaction flows.

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Full-Stack Development

End-to-end applications mapping secure business backends directly to responsive, high-performance React frontends.

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REST API Development

Secure and standard REST APIs featuring JWT authentication, role controls, query validation, and comprehensive Swagger documentation.

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Business Automation

Automating pipelines, synchronizing CRM platforms, and scheduling triggers using custom APIs and n8n orchestration.

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Database Design

Designing database schemas (PostgreSQL, MySQL, MongoDB), managing indices, and optimizing queries for high-volume transactions.

Featured Projects

Showcasing production-ready systems and backend architectures

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Currently Building

Active projects I am engineering and refining

AUConnect

Launched & Live

Smart shopping list application built with Flutter and Dart, simplifying grocery planning and list sharing.

Development Stage 100%
Next Step: Implementing recipe import algorithms and local SQLite migrations.

AUNext

Launched & Live

Digital library and coaching center management system built with Laravel and React, automating bookings and fee billing.

Development Stage 100%
Next Step: Adding automated email notifications and PDF test reports.

AUCart

Coming Soon

Multi-seller e-commerce marketplace built using Node.js, Express, React, and MongoDB, facilitating seller catalogs and payout logs.

Development Stage 40%
Next Step: Designing multi-seller inventories and Razorpay checkout webhooks.

Professional Experience

My career timeline and technical milestones

Backend & Full-Stack Developer

PPN Solutions Pvt. Ltd.

May 2026 - Present

Engineering core web platforms and backend services, transforming complex client demands into reliable and high-performance technical integrations.

  • Developed robust web application portals utilizing React frontends and PHP backends.
  • Designed structured RESTful APIs, securing them with JWT protocols and authorization middleware.
  • Restructured database schemas and indices, reducing query latencies on large transactional logs.
  • Automated backend workflows and integrations, streamlining synchronization across databases.

Latest from My Blog

I write about database optimizations, authentication workflows, REST design patterns, and system automations.

Read My Blog →
Dhiraj Roy Blog

Let's Connect

Have an open role, an internship opportunity, or a system requirements design? Let's discuss.

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WhatsApp

+91 93047 30973
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Social Profiles