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JULLES CARREON
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Integrations

Custom API & CRM / Systems Integration

Most growing businesses end up with a CRM, a website, an accounting tool, and a handful of spreadsheets that all hold pieces of the same information — none of it synced. I build the custom API connections and integration logic that make those systems talk to each other automatically, so a new lead, a closed deal, or an updated invoice updates everywhere it needs to, without anyone re-typing it.

What's included

  • Audit of your current tool stack and where data currently breaks
  • Custom API and webhook connections between your systems
  • Two-way sync where needed, so updates flow both directions
  • Authentication handled securely (OAuth 2.0 where supported)
  • Error alerting so a broken sync gets caught, not discovered later

How it runs

  1. 01

    Map every system currently holding customer or operational data

  2. 02

    Design the integration and data flow, confirmed with you

  3. 03

    Build, test with real records, and stage before going live

  4. 04

    Monitor the first sync cycles to confirm data integrity

Ideal for

Businesses running on multiple disconnected tools — CRM, invoicing, scheduling, spreadsheets — where data has to be manually re-entered across systems.

Pricing

Project-based

Quoted per integration based on the systems involved and whether sync needs to run one-way or two-way.

Tools

REST & GraphQL APIsWebhooksHubSpotGoHighLevelAirtableGoogle Workspace

Booking new projects for October 2026

Let's map what a system built for your business actually looks like.

See the work
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