Systeme.io PayPal Integration Setup

I need a developer to connect my existing PayPal Business account to my funnels on Systeme.io. The goal is for PayPal to sit beside Stripe at checkout, verify each payment through an IPN/webhook, and trigger immediate, automated product delivery only after the payment is confirmed.

Scope of work
• Retrieve my API credentials (username, password, signature) from PayPal and insert them in the Systeme.io gateway settings so PayPal appears as a live payment option.
• Create and map the PayPal IPN/webhook endpoint inside Systeme.io to mark orders as “Paid” and unlock the product automatically.
• Add lightweight logging so every PayPal transaction ID is stored against the corresponding sale for quick reconciliation and dispute protection.
• Run sandbox then live test payments to confirm funds clear, access emails fire, and order data stays in sync.
• Carry out basic security checks (SSL verification, callback validation, error handling).

Please respond with a fixed price, the number of days you’ll need, and anything else you require from me (e.g., temporary admin access). I already have PayPal Business credentials ready; the site itself sits on Systeme.io rather than WordPress or Shopify, so experience with that platform is a plus.