Vibe coding for CEOs in fintech.
You run a lender, a payments business or a wealth firm, and the tool you want is the one compliance said would take a vendor a year. The tension is that the person who owns the licence is also the one whose prototype can move real money without a second approver.
What is true about software in fintech before you write a prompt.
In financial services, software that touches money or financial records is regulated software, whether it was built by a team of forty or by an executive on a weekend. Fintech companies, lenders, payment businesses and wealth managers all have rules about data, access, records and controls, and a vibe coded tool inherits all of them the moment it connects to a real account.
Money is whole cents, never decimals
Floating-point arithmetic rounds. The AI uses it by default. A ledger, a fee calculation or a payout built that way will be wrong by pennies that add up to an audit finding.
Every action needs a record
Who did what, when, from where. Regulators expect an immutable audit trail, and a homemade tool that lets a record be edited with no history is a control failure.
Credentials are the whole company
A key to the payments provider, the bank feed or the ledger is not a config setting. It is the ability to move money. It lives in a secret store, scoped to the minimum, and never in the code.
Customer financial data has rules about where it lives
Residency, encryption and retention requirements apply. A default database in the wrong region on a free tier is a finding waiting to happen.
What a CEO in fintech builds first.
01The underwriting rule you want to test
A scoring rule run against historical applications to see how many approvals change before you ask the credit team to adopt it. Kept read-only and off production it is safe. Wired into live decisions it is a regulated model.
02The regulatory report nobody wants to assemble
Suspicious activity, capital or transaction reports assembled from the ledger export every month by three people. You build the assembler, and the tool now holds the regulated records and needs its own retention rule.
03The partner or broker portal
Brokers, agents or platform partners submit applications and check status. Each partner must see only their own applicants, and the AI will build one shared list unless you say otherwise.
CEOs in every industry tend to build the same four things. The CEO page has that list.
A CEO's tool with the live payment key
You paste the live payment provider key into the tool because the sandbox behaved differently. The tool ships, the key sits in the repository, and a contractor clones it. When money moves that nobody authorised, the regulator does not ask which tool did it. They ask why the CEO had a live key in code with no dual control, and the answer lands on the licence.
The pattern underneath is the one every CEO hits: you demoed it, a customer bought it, and now the first version, built to look right rather than be right, is what the company sells. Nobody planned the handover because there was never going to be one.
What a safe build in fintech usually runs on.
Builds run on hosting with the right compliance attestations, Postgres with encryption at rest, single sign-on, secret management from the hosting platform, and Stripe or the company's payment provider through a scoped key. Money is stored as integers. Every write to a financial record is logged with who and when.
What changes for a CEO in fintech.
A CTO in your corner does not slow you down. Before you prompt, you get the ten-minute conversation about what to build and what not to. Before you show it to a customer, someone has read how it stores data and who can see it. When you hand it to a team, it comes with a written account of what it is and how it works. You keep building at CEO speed. The company stops paying for it later.
What CEOs in fintech ask.
A CTO who has read fintech apps before yours.
Thirty minutes, free, no card. What you built, what is going on with it, whether we can help.
In your corner.