VaultPay

A multi-currency payment and expense management SaaS for SMEs operating across Southeast Asia. Handles cross-border transfers, team spending cards, and real-time reconciliation — all from a single dashboard.

Overview

VaultPay solves the fragmented banking reality for small businesses in Bangladesh, Pakistan, and Indonesia that operate in multiple currencies. The core infrastructure is built around a ledger-first architecture where every debit and credit is recorded as an immutable event before any state mutation happens — guaranteeing consistency even during partial network failures. Virtual team cards are issued through the Stripe Issuing API with per-card spending limits and real-time transaction webhooks.

Highlights

Ledger-first architecture for guaranteed consistency

Multi-currency wallets with live FX rates

Virtual team spending cards via Stripe Issuing

Idempotent payment processing (zero duplicate charges)

Real-time transaction webhooks and reconciliation

Role

Backend Engineer & Security Lead

Stack

Node.js // PostgreSQL // Stripe // Redis // TypeScript

Result

Successfully processed $1.2M in transactions during beta. Zero double-charge incidents due to idempotent payment processing. Reconciliation time for 500-transaction batches reduced from 4 hours to 8 minutes.

Project Details

Slugvaultpay

YearQ2 2025

StatusBeta

CategoryApps & More