A deep dive into building BSBFinder.com — a free Australian BSB number lookup tool — from data pipeline to deployment.

Every Australian bank transfer requires a BSB number — a 6-digit code identifying the bank and branch. There are over 16,750 active BSB codes, and the existing lookup tools were either clunky, ad-riddled, or buried inside bank websites.

So I built BSBFinder.com — a fast, free tool that lets you search any BSB code and get the bank name, branch address, SWIFT code, and payment capabilities instantly.

Here's how I built it.

The Stack