Supun
Sandeepa.
Senior Software Engineer
I design and build scalable enterprise software, 5+ years across insurance & education platforms with Java, Spring Boot, Angular and AWS.
◉ Colombo, Sri LankaFull-stack engineer
with a backend edge.
Building software that scales, from first line of code to production release.
I'm a Senior Software Engineer with 5+ years designing, building, and optimizing scalable enterprise applications.
Currently at OSOS Technology, I build front-end features with Angular and back-end services with Spring Boot for a Student Information System spanning Oman and Sri Lanka. My background covers insurance and student systems where I've improved backend performance, built secure authentication flows, and optimized database-driven applications.
I thrive at the intersection of clean frontend architecture and solid backend engineering, delivering high-quality solutions in collaborative Agile teams, increasingly accelerated with AI-assisted development.
Cut backend response time by 30% and improved server response by 80% via JVM tuning, indexing & pagination.
Designed microservices with Java & Spring Boot; led monolith-to-microservices migrations.
Secure auth flows with Keycloak, OAuth2, OpenID Connect & JWT across enterprise platforms.
Where I've worked.
Four companies, one focus, shipping reliable software that performs at scale.
- Building front-end features with Angular and back-end services with Spring Boot on a Student Information System supporting academic management workflows.
- Shipped REST APIs and Angular UI for academic features incl. resit/retake registration and invoice generation (Spring Boot + Gradle).
- Replaced static dashboards with a dynamic, self-service analytics platform using Vizzly, 10+ custom views, user-built through the UI.
- Accelerated delivery by integrating Cursor and Claude into the daily workflow via prompt engineering.
- Led development of scalable microservices with Java, Spring Boot & REST APIs, 30% better third-party integration efficiency.
- Led the framework upgrade to Spring Boot 3, boosting performance, scalability and maintainability.
- Achieved a 30% drop in backend response time via JVM tuning and database indexing; 80% faster server responses through pagination.
- Enhanced backend dev efficiency by 40%, reducing technical debt with shared utilities and best practices.
- Engineered a permission-based API integration with Keycloak, cutting user-management time by 50%.
- Refined high-performance queries on PostgreSQL & MySQL, 20% faster execution for high-volume apps.
- Led the transition from a monolith to a microservices architecture, 40% better scalability, 30% less maintenance.
- Developed web applications with Java & Spring MVC, improving performance by 20%.
- Collaborated within an Agile team using Git, 15% improvement in development efficiency.
- Maintained comprehensive technical documentation, reducing onboarding time by 20%.
Tools of the trade.
A pragmatic, full-stack toolkit refined across enterprise projects.
Credentials.
A first-class degree and active, verifiable cloud credentials.