Merge Studio · Belgium
We build the operational infrastructure behind ecommerce - inventory sync systems, ERP integrations, migration tooling and custom Shopify apps for brands and agencies who need things to work reliably.
Shopify · GraphQL · Webhooks · Cron · SQL
sync-job.ts
import { reconcileInventory, pushToTargets } from './sync';
export const runSyncJob = async (event: SyncEvent) => {
const delta = await reconcileInventory(event.sourceId);
if (!delta.items.length) return { status: 'clean' };
await pushToTargets(delta, { throttle: true, retries: 3 });
return { synced: delta.items.length, store: event.storeId };
};Services
For brands and agency teams.
Purpose-built Shopify apps using the Functions API, App Bridge and the Extension framework. Custom discount logic, checkout extensions, B2B pricing rules - built for correctness, EU VAT compliance and long-term maintainability.
Third-party integrations over REST and GraphQL designed for production reliability. Webhook processing with retry logic, rate-limit handling, dead-letter queues and structured logging. Built to run unattended.
Bidirectional synchronisation between Shopify and CRM or ERP systems via webhook pipelines and SQL intermediary layers. Handles order routing, stock updates, customer records and fulfilment events with full audit trails.
Cron-based and event-driven workflows for inventory synchronisation, order routing, fulfilment triggers and returns processing. Designed to reduce manual operations overhead and run reliably across store networks.
Migration infrastructure for large Shopify catalogs. Product normalisation, customer transfer, gift card migration, image mapping and post-migration validation tooling. Scheduled imports with reconciliation checks before go-live.
Operational tooling for ecommerce teams - catalog normalisation pipelines, AI-assisted metafield generation, translation workflows and custom admin interfaces. Built around actual day-to-day workflows, not generic templates.
Work
Inventory Sync
Synchronisation infrastructure connecting two source Shopify stores and a centralised inventory feed. Cron-based sync windows aligned with physical store opening schedules. Reconciliation logic handles duplicate prevention, rate-limit backoff and variant-level discrepancies across 20k+ products and 80k+ variants.
Architecture
CRM / ERP Sync
Migration
Catalog Tooling
Philosophy
It does exactly what it should - reliably, quietly, without drama. We build for the teams who operate these systems day after day, not just for the initial launch.
Clear scope means fewer surprises. We define exactly what we're building before we build it - and we stick to it.
We reach for the most direct solution. Every layer of abstraction is a future maintenance burden. We add them only when they genuinely earn their place.
Code that can only be operated by its author isn't finished. We write systems that your next engineer - or us - can confidently maintain.
Good work takes the time it takes. We don't overpromise timelines or cut corners to hit arbitrary deadlines. Steady, clear, methodical.
About
Merge Studio is an independent Brussels-based studio building Shopify apps, API integrations, CRM and ERP synchronisation systems, ecommerce automation and migration tooling for ecommerce brands and agencies.
The studio is led by Benjamin Dos Santos, an independent Shopify systems developer based in Belgium. Public profiles: LinkedIn and GitHub.
Recent work includes 20k+ products synchronized, 80k+ variants tracked, CRM/ERP sync via webhooks and SQL, WooCommerce to Shopify migration workflows, and Shopify API, GraphQL, webhooks, cron and SQL infrastructure.
FAQ
Yes. Merge Studio builds custom Shopify apps, checkout extensions, Functions logic and admin tooling for operational ecommerce workflows.
Yes. We build CRM and ERP sync systems using Shopify APIs, webhooks, SQL intermediary layers, retry logic and reconciliation checks.
Yes. Merge Studio works with agencies that need deeper Shopify integration, migration or automation support for client projects.
Yes. We build WooCommerce to Shopify migration workflows for products, customers, images and post-migration validation.
Yes. We build AI-assisted catalog normalization, metadata enrichment and translation workflows around practical ecommerce operations.
Contact
Whether you're a brand scaling your operations or an agency that needs integration depth - tell us what you're working on and we'll take it from there.