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1. account-service-with-kotlin account-service-with-kotlin Public

   In this project, I build a focused Spring Boot + Kotlin REST API — Covering service architecture, authentication, role-based access control (RBAC), and a security event audit log. 70/70 tests end-t…

   Kotlin

2. as400-ibmi-batch-simulator as400-ibmi-batch-simulator Public

   In this project, I build a focused IBM i batch settlement system — DB2 for i, COBOL/400, RPGLE, CL, ILE service programs, 5250 UI, and a Java Spring Boot REST API via JT400. 40/40 tests end-to-end …

   Java

3. ca-iso20022-streaming-pipeline ca-iso20022-streaming-pipeline Public

   In this project, I build a focused event-driven Corporate Actions post-settlement platform — Java 21, Spring Boot, Kafka, PostgreSQL, and COBOL reference-data enrichment. Supports SWIFT MT566 and I…

   Java

4. cinema-room-rest-service-with-java cinema-room-rest-service-with-java Public

   In this project, I build a focused Spring REST service for theater management — Handling ticket booking, seating arrangements, and revenue statistics with Java. 100% test coverage.

   Java

5. cinema-room-rest-service-with-kotlin cinema-room-rest-service-with-kotlin Public

   In this project, I build a focused Spring REST service for theater management — Handling ticket booking, seating arrangements, and revenue statistics with Kotlin. 100% test coverage.

   Kotlin

6. git-internals git-internals Public

   In this project, I build a focused Git internals tool in Kotlin — Parsing raw Git objects (blob, commit, tree), listing branches, and walking commit history to understand the underlying Git plumbing.

   Kotlin