Shopify Full Stack Development

Shopify Full Stack Developer

Custom Apps • Admin API • Inventory Sync • Webhooks

I build the storefront and the systems behind it: custom Shopify apps, Admin GraphQL, multi-warehouse inventory, hardened order webhooks, and B2B portals. Not theme tweaks only — production apps that keep Shopify stock and automation honest.

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Shopify Full Stack Services

From custom apps to inventory truth — one stack across Shopify and your backend

Custom Shopify Apps

Embedded admin apps with Polaris UI, OAuth install, session storage, and React Router — automation that lives inside Shopify Admin.

✓ Shopify app scaffolding & deploy
✓ Polaris admin UI
✓ Scoped Admin GraphQL
✓ Postgres / Prisma sessions

Inventory Sync

External inventory as source of truth, Shopify levels updated on IN / OUT / adjustments — multi-warehouse sale waterfalls included.

✓ Inventory Levels API
✓ Product / variant mapping
✓ Multi-warehouse priority
✓ Queue-backed stock jobs

Webhooks & Orders

orders/paid, cancel, refund — HMAC-verified, idempotent handlers so stock and fulfilment never double-deduct.

✓ HMAC webhook verification
✓ Idempotent processing
✓ Cancel / refund restock
✓ Fulfilment hooks

B2B & Portals

Agent / wholesale portals on top of Shopify customers — box inventory, CRM connect, scheduled gift orders.

✓ Customer-tagged agent login
✓ Auto Shopify order create
✓ CRM adapters (Vault / Rex)
✓ Card-at-dispatch flows

Shopify Work Examples

Recent full-stack Shopify builds — theme is only half the story

Case 01 · Shopify App

Mayfair Lane

Gifts & Hampers · Australia

Shopify App React Router Polaris Postgres

Anniversary gifting platform on Shopify

Built a custom Shopify app for real-estate agent anniversary gifts: agent portal, CRM connect scaffold (Vault / Rex), payment settings, and automated Shopify order creation — without touching the live theme until the rebrand phase.

✓ Custom Shopify app (React Router + App Bridge + Polaris)
✓ Agent login via Shopify customer + agent tag
✓ Auto Shopify order creation for scheduled gifts
✓ Box inventory scaffold via orders/paid webhook
✓ CRM + card-at-dispatch payment paths scaffolded for next phases

Stack: Shopify Admin API · Node · Postgres · Docker · Shopify CLI

Case 02 · Inventory Sync

Bersa Atelier

Luxury bags · Staff inventory

Admin API Laravel Webhooks Multi-warehouse

Multi-warehouse inventory synced to Shopify

Staff inventory system (Laravel 11 + Filament) owns finished-goods stock. Mapped products push quantity to Shopify; sales deduct across warehouses in priority order (Amjad → Main → Abdul Basit) and cancel/refund webhooks restore stock.

✓ Shopify inventory push with write_inventory Admin API scope
✓ Order webhooks: paid / create / cancelled + refunds
✓ Multi-warehouse sale waterfall + sum-to-Shopify levels
✓ Product mapping for finished bags; packaging excluded from Shopify sync
✓ Queue jobs + WhatsApp low-stock / approval flows alongside Shopify

Stack: Shopify Admin API · Laravel 11 · Filament 3 · MySQL · Queues · HMAC webhooks

Technical Stack

Shopify Platform

• Shopify Admin GraphQL API
• Inventory Levels & Locations
• Custom / embedded apps (App Bridge)
• Polaris design system
• Shopify CLI & app deploy
• Webhooks: orders, refunds, fulfilment
• Online Store themes (Liquid) when needed

Full Stack Around Shopify

• Node.js / React Router apps
• PHP / Laravel backends
• Postgres & MySQL
• Queue workers & cron schedulers
• HMAC signature verification
• Idempotent webhook handlers
• WhatsApp / CRM side-channels

FAQ

What does a Shopify full stack developer build?

Theme and storefront work plus custom Shopify apps, Admin GraphQL integrations, inventory sync, webhooks, B2B portals, and backend systems (Node, Laravel, Postgres/MySQL) that talk to Shopify securely.

Can you sync inventory between Shopify and an external warehouse system?

Yes. Push available quantities to Shopify Inventory Levels, and deduct or restore stock from order, cancel, and refund webhooks — including multi-warehouse waterfalls.

Do you build custom Shopify apps or only themes?

Both. Recent work includes a custom Shopify app for anniversary gifting automation, and a Laravel inventory system that owns stock truth while Shopify remains the storefront.

Need a Shopify full stack developer?

Apps, inventory sync, webhooks, portals — tell me what broke or what you want next.

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