API integration and custom platform development

Systems that don’t talk to each other: your store, website, app and back office.

In short

Lintel builds API integrations that connect your Shopify store, website or app to the systems your business already runs on: ERP, inventory, accounting, CRM, shipping and marketing tools. We replace manual exports and copy-paste steps with automated, monitored flows that stay reliable as volume grows.

Who it is for

Businesses where people move data between systems by hand: orders re-typed into an ERP, stock levels updated from a spreadsheet, customer records that disagree between the store and the CRM. When two systems need to agree, an integration usually costs less than fixing the errors by hand.

What we build

  • Order, inventory and customer syncs between Shopify and an ERP, warehouse, POS or accounting system.
  • Webhook-driven flows that react to events as they happen instead of polling on a schedule.
  • Middleware and custom APIs when two systems have no direct connector, or the connector does not fit your process.
  • Integrations for websites and apps: forms, portals and mobile apps that read and write the same data as your store. See custom software development.
  • Replacements for fragile no-code chains that have outgrown their limits.

How we build integrations

  • Map the data first: which system owns each field, what happens on conflicts and what must never be overwritten.
  • Event-driven where the platform allows it: Shopify sends webhooks for changes such as new orders, so a flow can react without constant polling.
  • Safe to run twice: every handler is written so a repeated or delayed delivery cannot create duplicates.
  • Visible failures: logging and alerts, so a stopped sync is noticed in minutes, not at month-end.
  • Kept current: Shopify releases API versions on a regular schedule, and integrations are planned for those updates.

Platforms and systems

We work with REST and GraphQL APIs, webhooks, file-based exchanges when a system offers nothing else, and Shopify’s Admin and Storefront APIs. For Shopify-specific work, see Shopify development and custom Shopify apps.

How an enquiry works

  1. Send a short briefTell us about the store and what isn’t working.
  2. We review itUsually within 24 hours.
  3. Scope and pricingWe discuss what the work involves and what it costs.
  4. Go ahead if there’s a fitThe project starts once scope and price are agreed.

Gencer KarakayaFounder & Shopify Engineer

Every brief is reviewed by the founder.

Questions

Do you use existing connectors or build custom integrations?
We start with the connector if one exists and fits your process. We build a custom integration when it doesn’t, or when the data rules are specific to your business.
What happens when an integration fails?
We design for it: retries, logging and alerts, and handlers that can safely process the same event twice, so a failure is visible and recoverable.
Can you integrate systems that are not Shopify?
Yes. Websites, web applications, mobile apps and back-office systems can be connected through their APIs, whether or not a store is involved.

Sources

  1. About webhooksShopify developer documentation, checked 25 September 2026
  2. GraphQL Admin API referenceShopify developer documentation, checked 25 September 2026
  3. About Shopify API versioningShopify developer documentation, checked 25 September 2026

Have something to build? Let’s engineer it.

Taking a limited number of projects at a time. Usually replies within 24 hours.

Gencer KarakayaFounder & Shopify Engineer

Your brief goes straight to the founder.