Switch from Stripe to Mollie

Migrated the client's tourism ticket booking platform from Stripe to Mollie to reduce transaction fees for the client and preserve the intended checkout experience. Mollie was a strong fit thanks to its better alignment with the platform's European market, lower per-transaction pricing. The switch also resolved occasional "pending" payment statuses from Stripe that would have impacted the user experience, since the booking flow was designed to return a final payment status in real time. Handling those pending cases would have required reworking the flow to show a pending state and notify the customer of the final status later by message — an approach the client preferred to avoid. Moving to Mollie kept the original real-time confirmation flow intact. Handled the full integration including webhook setup for instant payment status updates, and the migration was completed with no disruption to live bookings.