Work Experience

Working on modernization and development of enterprise internal systems, focusing on legacy migration and maintainable architecture design.

• Migrated multiple Servlet-based systems to Spring Boot microservice architecture (MarketingDX & PurchaseDX).
• Refactored business logic into service-based structure to improve modularity and maintainability.
• Implemented data access layer using JPA and MyBatis for Oracle integration.
• Led Indonesia POC: migrated legacy modules (Swing → JavaFX, Java 1.4 → Java 21, JDBC → Glue Framework).
• Designed prompts for AI-assisted code conversion using GitHub Copilot, reducing estimated migration effort by 60%.

Short-term contract onsite at Techcombank to develop banking APIs and testing tools in an Agile team.

• Developed an internal tool for QA team to simulate encrypted API requests (CCash).
• Updated and maintained APIs following database schema changes.
• Wrote unit tests using JUnit and Mockito, achieving over 95% test coverage.

Built and maintained backend systems for two product platforms, focusing on API design, system integration, and scalable architecture.

• Designed REST APIs for donor registration, appointment scheduling, and donation tracking integrated with third-party hospital systems (Giọt Máu Vàng).
• Used JasperReports to generate donation reports and blood request forms per hospital.
• Joined Mẹ Easy from ideation to production, setting up project structure and coding standards.
• Built REST APIs for social features: posts, challenges, comments, and user feeds.
• Generated reports and data exports using Apache POI for business analytics.

Developed frontend pages with Vue.js and backend APIs with Spring Boot for a Japanese outsourcing project.

• Developed frontend pages with Vue.js (ElementUI).
• Built backend APIs with Spring Boot and PostgreSQL.