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Anton DeveloperGet an estimate

Apps & integrations

Custom Shopify app development

When no app does what your store needs, I build one just for you: storefront features, checkout logic, admin tools and the backend behind them.

Get a fixed estimate See the work 2

What's included

A plan of the app, agreed with you before any code
An admin inside Shopify, built on Polaris
Theme app extensions for the storefront
Shopify Functions and checkout extensions where needed (Shopify Plus)
A backend, database and hosting, with tests
Handover notes and support after launch

Sounds familiar?

You run three apps that each do part of the job.
The feature you need does not exist in the App Store.
An app slows the store down and loads on every page.

If one of these is yours, send me a link and a few lines. Describe your task

How a project runs

Step 1: Send the task
A link and a few lines is enough.
Step 2: Fixed estimate
Hours, scope and deadline before any work starts.
Step 3: Build & review
On a preview theme. Nothing goes live without your OK.
Step 4: Pay on delivery
Exactly the estimate. Nothing added later.
Projects up to 20 hours usually need no prepayment. Bigger ones are agreed individually.

30-day warranty. Critical bugs from my work get fixed free, even after that.

Related work

Projects where I did this work, each with the problem, the decisions behind the build and the result.

Questions

Who owns the app?

You do. A custom app is installed only on your store, and the code and hosting accounts are yours.

Where does it run?

Usually on Railway or Fly.io, on an account you own, with deployment and backups set up.

A client's words

Kidoriman
Oct 2026
Ongoing website management
Anton works with us on an ongoing basis as our Shopify site manager, and he's become a real part of our team. He handles our theme and section updates, moved our exchanges from Loop's legacy flow to…Read moreShow less of the review from Kidoriman
Anton works with us on an ongoing basis as our Shopify site manager, and he's become a real part of our team. He handles our theme and section updates, moved our exchanges from Loop's legacy flow to Shopify native exchanges, and tested every scenario thoroughly before going live. He also audited our GTM tags and pixels, which gave us real confidence in our tracking data.
He's proactive, detail-oriented and always clear in his communication. He flags issues before we notice them and explains technical decisions in plain language. He doesn't feel like an outside contractor. He feels like one of us. Highly recommended for any brand looking for a reliable, long-term Shopify partner.
See the project

Have a task like this?

Send a link and a few lines about what you need. I reply within 1 business day with questions or a fixed estimate.

Get a fixed estimate

The estimate is the priceHours and total agreed before work starts. No re-estimates.
No prepayment on small projectsProjects up to 20 hours usually need none.
30-day warrantyCritical bugs from my work get fixed free, even after that.

My gift: start a Shopify store for €1 for your first month

Open your store through my partner link and try Shopify for yourself. When you need a theme, an app or a migration, I'm one message away.

Claim the €1 month

Affiliate link: I may earn a commission if you sign up. The offer is set by Shopify and may vary by region.