"How we built Birik — group expense splitting on Stellar in 30 days"

The problem we tried to solve Splitwise and Tricount solved the tracking problem a decade ago: who owes what in a group, who's even, who needs to pay up. They're great. Millions of people use them. But they only ever got you halfway. When the dust settles and the app says "Selin owes you 340 TL" —