Fintech App Development Services

We quote the software in phases and fix each phase, but the software is the smaller half of your number. Most of what you will spend goes to the banking partner that holds the money and to the identity checks run on every new customer. Both bill per account, every month, ongoing. Linking external accounts through Plaid works the same way. We model those bills before you commit.

Building it is the predictable part, usually a few months from a signed scope. What sets your actual launch date is the bank behind you saying yes. That is an approval process on somebody else's desk, with their paperwork and their queue, and no agency can speed it up much. We build against a test environment from week one so the two run side by side.

Yes, and we would push you towards one. A first version with accounts, transfers and identity checks run through a provider like Persona proves the thing your banking partner and your investors care about, which is that the money adds up. Cards, lending and rewards can wait. The part we will not defer is the bookkeeping underneath, because changing how balances are recorded later means building it twice.

We build apps that move real money, and the habits matter more than the label: every movement recorded on both sides so balances reconcile, retries that cannot pay twice, and a record of who did what. We have worked with account-linking services and banking-as-a-service providers such as Unit. For named work, we prefer a private introduction to clients over anything published here.

At minimum: sign-up with an identity check, a balance and transaction history people believe, transfers, and a clear message every time money moves. Underneath sits the ledger that stays correct through failed, retried and reversed payments, which is where the real engineering goes. Card issuing, Apple Pay, savings pots and budgeting tools are add-ons we scope and price separately once the core is live.

Because we are straight about the parts we do not control and put them in the plan rather than the small print. The code, the cloud accounts and the data sit in your name from the first commit. After launch most clients keep us on a retainer covering failed transfers, reconciliation alerts and the re-authentication prompts Plaid sends. You can take that in-house whenever you want.