Kaveret & Website: SKU Sync, CRM Customer Update & Supplier JSON Import

We're looking for a developer to implement 3 backend and automation tasks across our Kaveret system and website. All 3 tasks are bundled into a single fixed-price contract of $140 USD, paid as one milestone upon completion of all of them. What needs to be done: 1) Add Product SKU to Kaveret Sales: Create a new backend endpoint and connect it via an n8n workflow so that product SKU data is included and visible in Kaveret sales records. The field should populate correctly when a sale is created or updated. 2) Update Kaveret CRM Customer Fields on Purchase: When a customer completes a purchase on the website, trigger an n8n workflow that updates the corresponding customer record in Kaveret CRM with the relevant purchase details. Ensure the mapping between website order data and CRM fields is accurate. 3) JSON Upload Supplier Selection Prompt: Before a supplier JSON file is imported into the system, add a prompt or selection step that allows the user to choose which supplier the import belongs to. This should be integrated into the existing import flow. Deliverables: - Code changes committed to the existing codebase. - Light testing of each feature in our dev or staging environment before handover. - A short note per task explaining what was changed and where (file and function level). Timeline: roughly 5 business days total. Tasks can be worked in parallel where it makes sense. Revisions: up to 2 rounds of revisions per task within original scope, included. IP and Confidentiality: All code becomes our property upon final payment. Contractor agrees not to share or reuse the codebase or business logic. Ideal candidate: intermediate full-stack developer comfortable with PHP, JavaScript, and n8n automation workflows. When applying, please briefly mention similar backend integration or CRM automation work you've done.