Shopify apps · Custom e-commerce software · Made in the USA
Unrested Development builds Shopify apps and custom software for e-commerce brands that have outgrown duct tape. Clean code, clear numbers, and a developer who is suspiciously available.
What I build
I focus on the parts of e-commerce that move revenue and save hours: apps, checkout, integrations, and the back-office glue nobody wants to touch.
Public apps for the App Store and private apps built for one store. Embedded admin UI, billing, webhooks, and an app review submission that passes the first time.
Side effect: fewer spreadsheets open on your desktop.
Checkout UI extensions, Shopify Functions for discounts, shipping, and payment rules, plus theme app extensions that don't slow your pages down.
Side effect: higher average order value. Mild giddiness.
Connect Shopify to your ERP, 3PL, CRM, or accounting stack. Reliable syncs with retries, logging, and alerts, so orders and inventory agree with each other.
Side effect: your ops team stops copy-pasting order numbers.
B2B wholesale portals, subscription logic, product configurators, and internal dashboards. When an off-the-shelf app gets you 70% of the way, I build the other 30%.
Side effect: canceling three app subscriptions you forgot you had.
About
I read your P&L before I read your codebase. Then I read the codebase too. Twice.
Still awakeHi, I'm Andrew. I'm a developer in Saint Paul, Minnesota who genuinely likes business problems. Margins, fulfillment bottlenecks, returns that eat profit, the manual task someone does every Monday for three hours. That's the good stuff.
Every project starts with what it's worth to you. If a feature won't pay for itself, I'll tell you, even if it means a smaller invoice. If it will, I'll build it properly, document it, and hand you the keys.
The "unrested" part is mostly a joke. You get real business hours, fast replies, and a developer who cares about your store like it's the only one on the internet.
Selected work
A few examples of the kind of problems I solve. Names are kept private because merchants like their competitive edge.
Forecasts demand per SKU from order history and flags reorders before beans run out. Purchase orders draft themselves.
Result: stockouts down 40% in one quarter
Tiered pricing, quick-order grids, and net terms on top of Shopify, so retailers reorder without emailing a rep.
Result: 12 hours a week back for the sales team
A bundle builder on the product page with discount logic running natively in checkout. No scripts, no lag.
Result: AOV up 22% in six weeks
Two-way order, inventory, and fulfillment sync between Shopify and an ERP, with retries and a Slack alert when anything looks off.
Result: zero oversells through the holiday rush
How a project runs
Timestamps are for flavor. Real projects run on a calendar with milestones you approve.
We talk goals, numbers, and what's slowing the store down. Free, 30 minutes, no pitch deck.
A written plan with a fixed price or a capped range, plus the return you can expect.
Weekly demos on a dev store. You see progress, not a black box.
QA on real orders, a rollback plan, and a launch window when traffic is low.
Monitoring and a monthly care plan, so the app keeps up with Shopify's updates.
FAQ
Still curious? Ask me directly. I'll probably be up.
I sleep. Not much, and never during a launch. Day to day you'll get replies within one business day, US Central time, and a direct line for emergencies on support plans.
Yes. Checkout extensibility, Functions, B2B, and multi-store setups are a big part of what I do. I also work with growing stores on standard plans.
Small private apps and integrations often start around a few thousand dollars. Larger public apps and portals are scoped after discovery. You'll always get a fixed price or a capped range before work starts.
You do. Every line, in your own repository, with documentation. No lock-in and no surprise licensing fees.
Usually, yes. I start with a paid code audit so you know what you have, what's risky, and what it will take to fix before you commit to anything bigger.
Contact
Send a few lines about your store and the problem. I'll reply with honest next steps, even if the answer is an app that already exists.