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Backend engineerPortfolio / 2026

SakujaShamal

Java and Spring Boot developer building secure APIs, maintainable services, and reliable full-stack products.

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01About

Backend engineering built for clarity, security, and change.

I'm a backend-focused software developer based in Bandarawela, Sri Lanka, specialising in Java and Spring Boot. My work centres on REST APIs, authentication, relational data, and maintainable service layers.

I currently develop full-stack e-commerce features at Residue Solution and have led the delivery of a production-ready book sales and printing platform. I completed the CMJD programme at IJSE and await my BSc results.

Statement / 02

I buildsecuresystems.

03Selected work

Projects

Selected backend and full-stack systems spanning commerce, operational workflows, authentication, data, and cloud deployment.

Project / 01Book sales & printing platform / 2025

Devasee

Led a team to deliver an online book sales and printing management platform, building Spring Boot services for orders, users, and workflows with secure role-based access.

Contribution

Team lead / Backend development / Deployment

  • Java 11
  • Spring Boot
  • PostgreSQL
  • Azure
  • Next.js
Project / 02Individual project / 2024

Boarding Management

Built a web application for budgeting and daily boarding operations, including backend logic, GraphQL APIs, authentication, and cloud deployment.

Contribution

Full-stack design and development

  • Next.js
  • GraphQL
  • Clerk
  • Tailwind CSS
  • Vercel
Project / 03Individual project / 2022

E-Commerce System

Developed a full-stack commerce application with database persistence, REST API endpoints, frontend integration, and a Spring Boot backend deployed on AWS EC2.

Contribution

Full-stack development / Cloud deployment

  • Java 11
  • Spring Boot
  • MySQL
  • Angular
  • AWS EC2
Private project
04Experience & education

Path so far

AUG 2025 — PRESENT

Intern Software Developer

Residue Solution Pvt Ltd

Developing Java 11 and Spring Boot services, secure REST APIs with Spring Security and JWT, and MySQL-backed features for a full-stack e-commerce solution.

MAR — AUG 2025

Final Year Project Team Lead

Devasee Pvt Ltd

Led the delivery of a production-ready book sales and printing platform, including backend workflows, secure access, cloud deployment, and production readiness.

RESULTS PENDING

Bachelor of Science

University of Jaffna

Computer Science major with Mathematics and Statistics, supported by the Comprehensive Master Java Developer programme at IJSE.

05Capabilities

Engineering capabilities

  • Java & Spring Boot01
  • REST APIs & security02
  • SQL & schema design03
  • Cloud deployment04
  • Full-stack integration05
  • Debugging & delivery06
06Contact

Based in Bandarawela, Sri Lanka. Open to backend engineering roles, product work, and thoughtful collaborations.

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Let's work
together.