Insights
Practical guides on AI coding agents, LLM costs, websites and custom software: what we built, what it cost and what we would do differently.
Articles tagged Fintech
A demo becomes a handout when nobody can run its tests. Here are the money invariants worth asserting, and the scaffolding that lets a reviewer clone the repository and watch the ledger prove itself.
A balance column drifts the moment two writers touch it. Store the entries, derive the balance, lock the row inside the transaction, and correct mistakes with reversals instead of edits.
Bank transfer, Romanian card processors, Stripe and SEPA for a small SRL, with the fees we could verify today and the reconciliation work that decides whether the month closes.
