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Articles tagged with #fintech
You have tapped Pay twice when the app froze and then held your breath. This week I built the two things that mean you never get charged twice, and that anyone can prove it later.
An afternoon where one in six payments mysteriously failed, and the one-line database change that fixed it taught me more about Postgres than a year of reading docs
Your bank balance is not a number someone saved, it's a question the database answers by adding up your whole history, and that one design choice decides almost everything else
If a transaction that doesn't balance can't even be built without the compiler and a tiny Validate method noticing, a whole category of money bugs just stops existing
What a 600 taka dinner debt taught me about the system every fintech is built on, and why I'm spending twelve weeks building one in public
