Full integration with the gateway you choose, handling the cases that are usually forgotten: failures, refunds and verification.
Most payment problems do not appear on the happy path — they appear when a payment fails or is interrupted midway, leaving a paid order with no confirmation, or the reverse.
I build the integration with every case handled explicitly: confirmation by webhook rather than by browser redirect, every attempt logged, and order state guaranteed to match payment state.
Requirements and scope are pinned down before a line is written.
System architecture, database design and user interfaces.
Incremental delivery with regular updates you follow from your account.
Testing, deployment, code handover and post-launch support.
A custom online store with product management, fast search, customer accounts, a multi-step checkout and a complete order dashboard — built on Next.js, TypeScript and PostgreSQL.
A multi-tenant SaaS foundation with workspaces, members and roles, subscription billing, usage limits, an audit log and an operator console for the team that runs the product.
An online booking system with live availability, staff calendars, deposits, automatic reminders by email and WhatsApp, and an admin view for bookings, no-shows and capacity.