---
title: "Ecommerce & Webstore Development"
description: "Custom Shopify, headless commerce, and bespoke webstores with built-in AI shopping assistants, plus the inventory, payment, and integration logic growing U.S. businesses need."
canonical_url: "https://mercurystk.com/services/ecommerce-development"
last_updated: "2026-06-29T04:31:10.186Z"
---

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</page-hero>

## Stores built for how you actually sell

Template stores get you started, but growing brands hit limits fast — custom
pricing, multi-warehouse inventory, B2B workflows, or integrations a theme can't
handle. We build **comprehensive internet shops** that fit your catalog, margins,
and operations — and we can add an **AI shopping assistant that consults customers
on any product** in your store.

## Who this is for

Merchants who've outgrown a basic template and need real inventory, pricing, or
integration logic — without sacrificing speed or SEO.

## What we build

From a polished Shopify build to a fully headless storefront, plus the
integrations that keep orders and inventory in sync — and an optional AI assistant
that answers shopper questions and recommends products, grounded in your real
catalog so it never makes things up.

## Example use cases

Headless storefronts, B2B pricing, subscriptions, and complex inventory are where
custom work pays off most.

## How we work

Discovery → catalog & integration mapping → architecture → build → migration →
launch → optimize conversion.

## Frequently asked questions