GBT Market Trading and Payment Systems

Gold and crypto trading backend systems with live pricing, chart history, wallets, payments, and provider/admin operations.

Why the work mattered

A gold and crypto trading platform needed dependable backend services for live market data, trading flows, wallets, crypto gateways, and operational admin/provider workflows. The platform needed backend services that could keep trading, market data, wallet, and payment workflows coordinated across gold, tether, melted-gold, and crypto gateway domains.

What could not break

Live market updates, financial correctness, chart retention across multiple timeframes, third-party payment reliability, wallet auditability, and secure admin/provider operations.

How the pieces fit

NestJS and TypeScript services with MongoDB/Mongoose persistence, Redis, Socket.IO/WebSockets, scheduled jobs, payment gateway modules, TRON/BSC integrations, Docker, PM2, Swagger/OpenAPI, and logging.

My part

Built and maintained order, wallet, transfer, chart, socket, crypto gateway, provider, encryption, captcha, admin, and scheduled operational workflows while integrating external APIs and blockchain/payment providers.

What I was responsible for

• NestJS and TypeScript backend service implementation
• Real-time pricing, Socket.IO flows, and MongoDB/Mongoose chart history
• Wallet, transaction, crypto gateway, provider, admin, encryption, captcha, and scheduled operational workflows

Calls I made

• Kept market-data updates fast while preserving durable wallet and transaction records.
• Used Redis, scheduled jobs, and external API integrations where they supported freshness, retries, or operational visibility.

What I watched in production

• Financial correctness across wallet, order, and payment workflows
• Market-data freshness across multiple chart timeframes
• Third-party payment and blockchain provider reliability
• Secure admin and provider operations around sensitive trading data

What changed

Shipped trading and payment backend capability for gold and crypto market flows, including live pricing, chart history, wallet transactions, gateway integrations, and production operations.