2025

Wallet Service

A secure, scalable digital wallet API with Paystack integration.

• NestJS
• TypeScript
• PostgreSQL
• Paystack
• Google OAuth
• JWT

• Developed a digital wallet API supporting user registration, JWT + Google OAuth authentication, and full transaction management (deposits, withdrawals, transfers).
• Integrated Paystack for payments processing and TypeORM for PostgreSQL schema management and migrations.
• Implemented security best practices including bcrypt password hashing, SQL injection prevention, and HTTPS enforcement.