Connect Shopify to Ontraport via Make

I am looking for an experienced Make.com automation specialist to help complete an integration between Shopify and Ontraport. I have already built most of the Make scenario, but I am struggling with a few connections, data mappings and update steps. I do not need the entire integration built from scratch unless you identify that part of the existing setup needs restructuring. The main purpose of the integration is to transfer customer custom attributes, metafields and additional customer information from Shopify into the correct custom fields in Ontraport. This project is focused primarily on customer data rather than Shopify order or transaction information. The successful freelancer will need to: Review my existing Make scenario. Identify and fix the connections that are not working. Retrieve Shopify customer metafields or custom attributes correctly. Map each value into the appropriate Ontraport custom field. Search for an existing Ontraport contact before creating a new one. Update existing contacts without creating duplicates. Ensure customer information continues to sync when it is added or updated. Test the completed automation and explain any changes made. Add sensible error handling where required. Experience with all three platforms is strongly preferred: Shopify, including customer metafields and the Shopify GraphQL API Ontraport, including contacts, custom fields and API field IDs Make.com, including routers, filters, iterators, webhooks and API modules Please include examples of similar Shopify, Ontraport or Make integrations you have completed. In your proposal, please also explain how you would approach mapping Shopify customer metafields to Ontraport custom fields. I would prefer someone who can work collaboratively with me, review what has already been completed, and resolve the remaining issues efficiently rather than rebuilding everything unnecessarily. Deliverables A fully working Shopify-to-Ontraport Make scenario. Correct mapping of the required customer custom fields. Protection against duplicate Ontraport contacts. Successful testing using sample customer records. A brief handover explaining how the scenario works and how I can update field mappings in the future.