Hire a Developer for the Risky Parts of Your Shopify Store

The October 2026 checkout hijack showed where a Shopify store is exposed: the code that apps load on the storefront and the accounts that control it. Our summary of the attack covers what happened, and our post on custom options after the checkout hijack lists the routes a store can take.

This post is about one of them: handing the risky parts of your store to a developer who builds them for you and checks them every day. A few years ago that was a big project for most merchants. Today it is often a small one.

Why a custom app is quicker to build than it was

Three things have changed.

• Shopify’s tooling does more of the work. The Shopify CLI sets up an app with authentication, the GraphQL Admin API and extensions in place. Theme app extensions, checkout UI extensions and Shopify Functions give each job a defined home, so less is built from scratch.
• The job is often small. The parts that worry merchants are usually narrow: a product option picker, an upsell block, a wishlist, a delivery date field. A custom app for one of them does one job for one store.
• Developers use better tools. Many teams, ours included, use AI coding tools to write first drafts and tests faster. That speeds up the build, but it does not replace review: every change should still be read, tested and deployed by a developer who answers for it.

Quicker does not mean careless. A fast build still needs the same basics: only the scopes the job needs, credentials kept out of the code, two-step authentication on every account around the app.

Which parts of a store are worth handing over

Not every app needs replacing. Start with the parts where a change can hurt shoppers or your data:

1. Anything that runs on the way to checkout. Cart drawers, upsells, product options and anything that touches the checkout button. This is what the October attack changed.
2. Apps with a custom code field. If a setting accepts JavaScript or HTML, whoever reaches that setting can run code on your storefront.
3. Scripts pasted into the theme. Tracking snippets and widgets added years ago, often by someone who has since left.
4. Integrations that hold write access. Anything that can change prices, stock or orders, such as an ERP sync or a feed tool.
5. Custom apps nobody maintains. Old API versions, unverified webhooks and credentials still held by a former freelancer.

What daily upkeep can cover

Building the part is half the job. The other half is noticing quickly when something changes. With daily upkeep, a developer checks every day, by script and by hand, the things that change without anyone noticing:

• The purchase path. An automated run adds a product and presses Checkout, and alerts when the shopper does not reach your domain or Shopify’s checkout.
• What loads on the storefront. Scripts, app embeds and the domains they call, compared with the day before. A new domain gets a question the same day.
• Who has access. New staff accounts, collaborator requests and newly installed apps.
• The app itself. Errors in the logs, webhook failures, dependency security alerts and Shopify API versions nearing their end of support.

You agree with the developer what is checked each day, how you are told, and what they may switch off on their own in an emergency, for example an app embed that starts loading an unknown script.

In-house, freelancer or a team

A merchant can do some of this alone. But daily checks fail quietly when they depend on one busy person. Before you hire, ask:

• Who covers the checks when your developer is away?
• Who holds the app’s credentials, and in whose accounts are the app and its hosting?
• What happens in the first hour after an alert?
• Will you get the code and the documents if you change developers?

Our guide on how to hire a Shopify app developer covers these questions in more depth, and the one on maintaining a custom Shopify app lists what upkeep includes.

Talk to us

The team behind StoreFleet, Shopify app developers since 2021, builds the parts of a store that need to be safe and keeps them in check: custom apps, theme app extensions and Shopify Functions, with upkeep that includes daily checks of the purchase path and of what loads on your storefront. Tell us which apps and scripts your store relies on, and we reply with what we would take over first. Our page on hiring Shopify app developers explains what we take on, and you can send a short brief from there.