Designing and building the FR3 payment gateway on NestJS and PostgreSQL — live modules for withdrawals, QRIS payments, OTP verification, webhooks, and host-to-host (H2H) transfers serving real transaction volume.

Delivered production websites and dashboards for independent clients — from marketing sites to internal tools — handling everything from UI to deployment.

Built a foundation across JavaScript, React, Node.js, and relational databases through hands-on projects, then narrowed focus toward backend systems and payments infrastructure.