Payment and Backend Architecture

A regulated event ticketing marketplace needed a payment system it could trust with real money at scale. I architected and built the backend and payment layer end to end — using Next.js, Node.js, and TypeScript on a PostgreSQL and Supabase data layer — to handle secure transactions, seller payouts, and regulatory compliance.

Ticketing in a regulated market is hard: money flows between buyers, sellers, and the platform, every transaction has to be auditable, and the system has to stay correct under load when a popular event goes on sale. The client needed a robust, secure backend architecture rather than a quick payment bolt-on.

A Next.js / Node.js / TypeScript backend exposing typed, well-structured APIs for the marketplace

A payment and ledger system handling buyer transactions, seller payouts, and refunds

A PostgreSQL schema (via Supabase) designed for auditability and data integrity

Authentication, authorisation, and compliance-aware data handling

An architecture built to stay consistent under high-demand on-sale traffic spikes

Next.js, Node.js, TypeScript, PostgreSQL, and Supabase.

The marketplace gained a secure, compliant payment backbone — handling transactions and payouts reliably, with a data model built for auditability and an architecture ready to scale with ticket demand.