Service
Custom Shopify apps when no app store app fits
Sometimes the feature you need simply doesn't exist, or the app that has it charges $299/month for 10% of what you need. I build private Shopify apps: embedded admin tools, storefront features via theme app extensions and app proxies, checkout UI extensions, AI-powered product tools. You own the code, you pay hosting at cost, and it does exactly what your business needs.
Sound familiar?
- ✕The feature you need doesn't exist in the app store
- ✕You pay hundreds per month for apps you use 10% of
- ✕An app almost fits, but its data model fights your catalog
- ✕You need functionality inside checkout or the customer account
What you get
- ✓Private embedded apps with Polaris admin UI
- ✓Theme app extensions: storefront features that survive theme updates
- ✓App proxy backends for logged-in customer experiences
- ✓Checkout UI extensions and Shopify Functions
- ✓Bulk product tooling: importers, generators, connectors
- ✓Deployment on your own infrastructure with docs and handover
Related work
Personalized gifts brand
AI image generation + print-on-demand, inside Shopify
A storefront experience where customers upload a photo, AI turns it into artwork, and the result is ordered as a printed product, fully automated from upload to fulfillment via a custom Shopify app.
Footwear brand (US)
Turning a spreadsheet catalog into thousands of Shopify products
A footwear brand managing hundreds of styles × colorways × sizes in spreadsheets needed its catalog in Shopify without an army of interns. I built an embedded app that generates and maintains the whole parent/child product structure automatically.
European supplement brand (NL/DE/UK)
Scaling a subscription brand: custom portal, Functions & 670-section theme
Long-running development for a fast-growing subscription supplement brand across three markets: a custom subscription portal replacing Recharge's default, Shopify Functions for discount logic, a checkout UI extension and a huge multi-market theme system tuned for paid traffic.
Frequently asked questions
What does a private app cost to run?+
Typically €5–20/month in hosting for a small Node.js app, versus a recurring app-store subscription. No per-order fees, no feature gates, and the code is yours.
Can an app add features for logged-in customers?+
Yes. Via app proxies I've built custom subscription portals and member areas that render inside your theme, talking securely to external APIs like Recharge.
Do you build public app-store apps too?+
My focus is private apps for single merchants or agencies. If you want to productize one into a public app, I can build it app-store-ready (billing, GDPR webhooks, review requirements).
Let's scope it on a call.
30 minutes, free. Bring your requirements and you'll leave with an honest assessment of feasibility, approach and effort.