If your NestJS backend still stores money as a single number, read this before you scale

#nestjs #fintech #backend #typescript

Most backends handling money keep one number on an account and update it directly. It works fine right up until two requests touch it at the same moment, or until someone needs proof of what actually happened months later and finds nothing but today's number staring back.

I have been talking about this exact problem while building a NestJS ledger meant to make that failure structurally impossible, immutable entries instead of a balance column, paired debits and credits, and row level locking that keeps a thousand requests a second from ever colliding. To see the full breakdown, check out the post below.

Peace Melodi

Jul 21

I am building a NestJS ledger designed so money can move a thousand times a second without ever vanishing

#nestjs #fintech #backend #typescript

4 min read

I am Peace Melodi, a backend software engineer. If you want your business to scale big, comfortably handling millions of users without breaking, with strong scalability and security in place, feel free to reach out.

LinkedIn: https://www.linkedin.com/in/melodi-peace-406494368
GitHub: https://github.com/PeaceMelodi