Taking Payment Link from a hosted checkout to a merchant platform: reusable products, a public SNAP API, roles and permissions, and reporting exports.

Preparing Doitpay's Bank Indonesia PJP Category 1 Bundle 2 submission: service flows, test strategy, and audit-ready UAT evidence.

Implementing multi-provider disbursement routing with configurable rules, operational controls, and reconciliation tools to improve payout reliability and reduce single-provider dependency.

Delivering reliable e-wallet checkout flow with redirect-based authentication and webhook-based status confirmation to ensure transaction consistency across asynchronous payment flows.

Building an in-product refund flow and a semi-automated review process to turn refunds from an ops cost into a retention tool, plus the number we never fully measured.