Sajeepan Sajee119

Sri Lanka │ Seeking Software Engineering Internship / Junior Developer roles │ Open to meaningful projects

I build practical, reliable, and user-friendly software with a focus on full-stack web development, clean interfaces, and maintainable backend systems.

About Me

I'm a Software Engineering student in Sri Lanka who enjoys turning requirements into complete, working products: planning the features, designing the interface, building the API, and deploying the result. My core stack is the MERN stack (MongoDB, Express.js, React, Node.js), and I also work with Java, PHP, Python and Android (Java/Kotlin). I'm currently looking for an internship or junior developer role where I can contribute to real products and keep learning from experienced engineers.

Building Full-stack applications and interactive web projects	Learning Scalable architecture, secure authentication, and better software design
Interested in APIs, dashboards, e-commerce, UI/UX, developer tools, and machine learning on EEG data	Collaboration Useful products, practical solutions, and continuous improvement

Education

	Qualification	Institution	Period
	BSc (Hons) Software Engineering (Third Year Top-Up)	University of Bedfordshire, delivered with SLIIT City Uni (Northern / Jaffna campus)	Starting Sep 2026 · expected graduation 2027
	Higher Diploma in Information Technology (HDIT)	SLIIT City Uni	Oct 2023 – Dec 2025

Experience

Web Development Intern (Virtual) · Syntecxhub
_{April – May 2026 · 1 month}

Built 4 full-stack applications with React.js, Node.js, Express.js, MongoDB and Tailwind CSS
Delivered a user management system with authentication and role-based access control
Built an employee management system with attendance, salary, documents, notifications and 2FA
Built an expense tracker with budgets and spending insights, and a product REST API with validation and image handling
Deployed projects to Vercel and managed source with Git and GitHub

Profile

	Area	Details
	Role	Software Engineering student and aspiring Full-Stack Developer
	Location	Sri Lanka
	Looking for	Software Engineering Internship or Junior Developer role
	Experience focus	MERN applications, REST APIs, CRUD systems, and responsive interfaces
	Current learning	Scalable backend architecture, secure authentication, and better software design
	Research interest	Self-supervised and machine learning for EEG brain-state analysis

Tech Stack

Languages

Frontend

Backend, APIs and Data

Mobile

Tools and Platforms

Development Practices

Core Skills

Frontend development Responsive layouts, component-based interfaces, forms, client-side interactions, and reusable UI	Backend development Express servers, RESTful endpoints, validation, CRUD operations, and API integration
Authentication and authorization Login/signup flows, JWT authentication, role-based access, 2FA, profiles, and admin dashboards	Database-driven applications Product, user, employee, student, order, and expense data management
Application features Search, filtering, favorites, notifications, dark mode, image handling, and reporting	Problem-solving Breaking requirements into features, debugging issues, and improving usability
Project delivery Planning, implementation, version control, deployment on Vercel, and iterative improvement	Research and analysis Reading papers, comparing methods against baselines, and writing up findings

How I Build

Understand the requirement and define the core features.
Design a clear and responsive user experience.
Build reusable frontend components and structured backend services.
Connect APIs and data models with validation and error handling.
Ship by testing, refining, documenting, and deploying the application.

Typical architecture of my MERN projects

flowchart LR
    U([User / Browser]) --> R[React + Vite UI]
    R -- "REST / JSON" --> A[Express API]
    A --> M[Auth + Validation Middleware]
    M --> C[Controllers and Services]
    C --> D[(MongoDB)]
    A -. "JWT + role checks" .-> M
    R --> V[[Vercel deployment]]

What I Build

Web Apps	Business Systems	Backend Services
Responsive React interfaces, dashboards, and interactive experiences	E-commerce, user, employee, student, and expense management systems	REST APIs, CRUD services, authentication, validation, and data workflows

Selected Work

E-commerce Platforms Full-stack shopping experiences with product management, authentication, orders, payments, responsive design, and admin workflows.	Management Systems Data-driven applications for users, employees, students, attendance, salaries, profiles, and role-based administration.
Interactive Experiences Browser games and engaging interfaces with timers, scoring, achievements, streaks, API-powered content, and responsive gameplay.	APIs and Utilities RESTful services and focused tools that solve practical problems through clear data models, validation, and simple user experiences.

Featured Projects

Project	Description	Stack
My Store	A production-ready MERN e-commerce platform with dark mode, shopping features, and an admin dashboard.	`MongoDB` `Express` `React` `Node.js`
User Management System	A full-stack system with authentication, role-based access control, profiles, admin tools, and REST APIs.	`MERN`
Employee Management System	An employee platform with attendance, salary management, document handling, notifications, and 2FA.	`MERN`
Expense Tracker	Income, expense, category, budget, and spending insights in one dashboard.	`MERN`
Recipe Finder App	A responsive recipe discovery app with categories, areas, recipe details, favorites, and a chat helper.	`React` `Vite`
Product API	A RESTful product management API with CRUD operations, validation, image handling, and scalable architecture.	`JavaScript` `Node.js`
Banana Quiz Game	A timed browser game with puzzle solving, scoring, streaks, achievements, and leaderboard progress.	`JavaScript`
Banana Quest	A game development project with a React/Vite client and Express server.	`React` `Vite` `Express`
Student Management System	A command-line application for managing students, courses, grades, and academic records.	`Python`

Project Deep Dives

My Store — MERN e-commerce platform

Customer side: product browsing, search and filtering, favorites, cart and orders, dark mode
Admin side: dashboard for managing products, orders and users
Under the hood: authentication, payments, image handling, responsive layout
Stack: MongoDB · Express · React · Node.js
Repo: Sajee119/my-store

User Management System — auth and role-based access

Access control: login/signup, JWT authentication, role-based permissions
Features: user profiles, admin tools for managing accounts
Backend: REST APIs with validation and error handling
Live: Open the app · Repo: Syntecxhub_User_Management_System

Employee Management System — attendance, salary and 2FA

HR features: attendance tracking, salary management, document handling
Engagement: notifications for employees and admins
Security: two-factor authentication and role-based administration
Live: Open the app · Repo: Syntexhub_Employee_Management_System

Expense Tracker — budgets and spending insights

Tracking: income and expense entries organised by category
Planning: budgets and spending insights
Live: Open the app · Repo: syntecxhub-expense-tracker-app

Banana Quiz Game — timed puzzle game

Gameplay: timers, puzzle solving, scoring and streaks
Progress: achievements and leaderboard
Content: API-powered puzzles in a responsive layout
Repo: Sajee119/Banana-Quiz-Game

Live Projects

	Project	Live preview
	Portfolio	sajeepan-portfolio.vercel.app
	CHAOSVERSE	chaosverse-sajee.vercel.app
	Expense Tracker	Open live app
	User Management System	Open live app
	Employee Management System	Open live app

Other Projects

CHAOSVERSE — Interactive web experience
Portfolio — Personal portfolio website
Event-Driven Programming Practical Lab — JavaScript event handling and delegation exercises
User Profile Management — Java-based profile management system

Research Interests

EEG and machine learning
For my final-year research I'm exploring self-supervised learning for personalised EEG brain-state representation: contrastive pre-training on public EEG datasets, few-shot adaptation to individual users, and comparison against supervised baselines.

Engineering Mindset

Simple interfaces
_{Easy to understand and use}

Reusable components
_{Less duplication, more maintainability}

Clear APIs
_{Predictable data flow}

Secure access
_{Protected user workflows}

Continuous improvement
_{Ship better with every project}

Currently Exploring

Improving backend structure and scalable API design
Building more secure authentication and authorization flows
Creating accessible, responsive, and polished user interfaces
Strengthening testing, debugging, documentation, and deployment practices
Turning project ideas into complete, useful products

Goals

	Goal	Status
	Land a Software Engineering Internship or Junior Developer role
	Complete the BSc (Hons) Software Engineering top-up by 2027
	Build production-grade, secure authentication into every full-stack project
	Deliver the EEG self-supervised learning research artefact

GitHub Analytics

Let's Connect

	Channel	Link
	Portfolio	sajeepan-portfolio.vercel.app
	LinkedIn	sivanadaraja-sajeepan
	GitHub	Sajee119
	X	@SSajeepan3492
	Email	sajeepan634@gmail.com

Thanks for visiting my profile. Let's build something useful together.