Turning ideas into scalable web solutions.
I'm Md. Hajjaj Bin Sonosi — a full-stack developer who builds backend systems in Java & Spring Boot and pairs them with fast, polished interfaces in React & Next.js. I like software that actually ships, and I'm always picking up whatever new tool the problem calls for.
Full-stack in practice, backend-minded by default.
I graduated in Computer Science & Engineering (Major: Software Engineering) from American International University-Bangladesh (AIUB) with a CGPA of 3.86/4.00, graduating Magna Cum Laude and earning Dean's List Honors four times.
Since June 2025 I've been working as a Web Developer at Easy To Europe, where I architected a production Next.js website end-to-end and now lead the backend build of an internal CRM in Java & Spring Boot.
AI tooling is part of how I work day to day — LLMs help me plan, prototype, and ship faster, and I'm comfortable wiring LLM APIs into a project when the requirement actually calls for one.
I care as much about the boring parts — schema design, API contracts, deployment — as the interface people see. And I'm genuinely quick to pick up new stacks: give me a new framework or tool and I'll be productive in it fast.
React / Next.js
Java / Spring Boot
MySQL
The stack I build with.
Organized the way I actually use it — server, client, and the tools in between.
Backend Development
- ›Java
- ›Spring Boot
- ›RESTful APIs
- ›MySQL
- ›OOP
Frontend & Web
- ›HTML5 / CSS3
- ›JavaScript (ES6+)
- ›React
- ›Next.js
- ›WordPress (custom)
Languages
- ›Java
- ›C++
- ›Python
- ›PHP
Tools & Platforms
- ›Git & GitHub
- ›Postman
- ›IntelliJ IDEA
- ›VS Code / Visual Studio
- ›Odoo (basic)
Hosting & CMS
- ›Elementor
- ›cPanel
- ›Domain & hosting config
- ›Deployment workflows
AI-Assisted Development
- ›LLM API Integration
- ›Prompt Engineering
- ›AI-Assisted Planning & Prototyping
- ›Faster Iteration with AI Tooling
Working Style
- ›Requirements → technical solutions
- ›Stakeholder collaboration
- ›Fast learner — quick to adapt to new stacks
- ›Production maintenance
Where I've been building.
- Architected and built a production website end-to-end using Next.js and React, moving the company's web presence onto a modern, componentized stack.
- Leading the backend build of an internal CRM system in Java & Spring Boot — API design, database schema, and user management.
- Collaborate directly with stakeholders to turn business requirements into technical solutions, end to end.
- Also maintain and extend existing WordPress-based sites where needed — custom HTML/CSS/JS, Elementor components, and performance tuning.
- Own hosting, domain configuration, databases, and deployment workflows across cPanel and modern hosting environments.
Things I've shipped and built.
From a live production website to systems-level coursework — ordered by what best shows the range. More on the way.
Easy To Europe
A multi-page Next.js website built and maintained in production, with an admin/CMS layer planned so non-technical staff can manage content across the whole site.
Internal CRM System
Backend architecture for an internal CRM built to replace a paid subscription tool — initial focus on user management, database schema design, and core REST concepts.
Modern City Scenario
A 3D city simulation with multiple animated objects — vehicles and environment elements rendered and moved in real time.
E-Ticketing System
A ticket booking system for bus, train, and air travel with seat selection, fare calculation, and booking management.
Prison Management System
A console-based system for managing prisoner records, with structured data handling and file operations.
Recognition along the way.
Academic honors and certifications — click any card with an image to view it up close.
B.Sc. in Computer Science & Engineering
AIUB · Oct 2020 – Jun 2024 · CGPA 3.86/4.00
Magna Cum Laude — Silver Medal
Graduated with high academic distinction, AIUB
Dean's List Honors — 4×
Awarded across multiple semesters, AIUB
Backend Web Development with Java & Spring Boot
Ostad
IT Essentials Certificate
Cisco Networking Academy
Let's build something that ships.
Open to full-stack and backend roles. Send a message and it'll land straight in my inbox — or reach me directly below.