About the modern financial infrastructure that the world sits atop of.

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I write roughly biweekly on the intersection of tech, financial infrastructure, and systems thinking. It's free.

How digital wallets work, and how payment costs drive a lot of product decisions inside and around them.

Apr 30th, 2024

Credit card rewards are mostly funded out of interchange, a fee paid by businesses to accept cards.

Mar 29th, 2024

Ever wondered about what happens when banks are closed or why some apps have operating hours? It's fascinating.

Feb 29th, 2024