Vibe coding for CFOs in e-commerce.
An e-commerce CFO sees a sales figure in Shopify that never equals the cash that lands in the bank, because processor fees, marketplace commissions, refunds, chargebacks and platform-collected sales tax sit between the two. Payouts arrive days later in lumps, and your first tool is the bridge across that gap.
What is true about software in e-commerce before you write a prompt.
E-commerce executives have a platform that does most things and a long list of things it does not. Vibe coding fills the list: the returns portal, the wholesale order form, the inventory view, the promotion tool. Every one of them touches orders, customers and money, and every one of them is visible to shoppers or connected to the systems that serve them.
Never store card data yourself
Payment details go through the payment provider and nowhere else. A tool that touches a card number, even briefly, brings PCI obligations the company does not want. The AI will happily build a card form. Do not let it.
Orders and inventory must agree
A tool that updates stock in one place and not the other oversells. A tool that changes an order without telling the platform breaks fulfilment. Integrations need to be two-way and idempotent, or read-only.
Traffic arrives all at once
A promotion tool or a returns page that worked in testing will be hit by thousands on launch day or Black Friday. Hosting, caching and rate limits are part of the build, not an afterthought.
Customer data is personal data
Names, addresses, order history and email. Privacy law applies, deletion requests must be honoured, and marketing consent is a record you have to keep.
What a CFO in e-commerce gets back first.
01The week a bookkeeper spends on payouts
Every Shopify Payments, PayPal and Amazon settlement broken back down to the orders, refunds and fees inside it and matched to the bank deposit. The longest manual job of the month becomes a check rather than a rebuild.
02The channel you think is winning
Product cost, shipping, packaging, payment fees, marketplace commission and attributed ad spend, per order. You see which channel loses money after the discount code in time to move the budget instead of explaining it.
03The threshold you cross without noticing
Sales by state against economic nexus thresholds, and tax collected by the platform against tax actually remitted. You register before the penalty, because the platform will never warn you.
Four more hold for CFOs in any industry. They are on the CFO page.
Refunds and chargebacks counted in the wrong month
The tool books revenue when the order is placed and refunds when the processor reports them, which can be forty days later, so a heavy return season shows a strong month followed by an inexplicable loss. Inventory is not adjusted for the returns either. You reorder against overstated sell-through, and the cash forecast that looked fine in November is wrong by the value of a container in January.
The pattern underneath is the one every CFO hits: floating-point rounding, a timezone shift on period boundaries, a currency conversion applied twice. The dashboard looks right. It is not, and it has been in the board deck for two quarters.
What a safe build in e-commerce usually runs on.
Builds usually sit next to Shopify, BigCommerce or a similar platform, connected through the platform's API with a scoped key, hosted on Vercel or comparable, with Postgres for anything the platform does not store. Payments stay inside the platform or Stripe. Public pages get caching and rate limiting before launch.
What changes for a CFO in e-commerce.
A CTO in your corner treats your finance tool like the financial system it is. Money is stored as whole cents, never as decimals. Every change is logged with who and when. Credentials are locked away, not in the code. The database has a backup and a tested way to restore it. You keep building the tool only you could design. It just passes the audit.
What CFOs in e-commerce ask.
A CTO who has read e-commerce apps before yours.
Thirty minutes, free, no card. What you built, what is going on with it, whether we can help.
In your corner.