I contribute to an integrated time-attendance and payroll platform, implementing and debugging business rules in Java/Spring and SQL. I also investigate production defects across application logic and database behavior, focusing on data correctness and reliable fixes.
I built Coffee OS, an independent multi-tenant SaaS platform for coffee businesses that covers customer ordering, reservations, administration, and operational workflows. I worked through payment and webhook state-reconciliation issues across the frontend, database, provider, and asynchronous lifecycle, and applied authentication, authorization, and database-level RLS.
My projects also include a 3D robotic-arm simulator connecting a C controller to a Python application, a football intelligence app, and an AI-assisted resume builder. I work across Java, TypeScript, Python, and Go, with experience in REST APIs, PostgreSQL, and database-driven workflows.
