Integrate paypal in codeigniter/php

I am looking for a skilled developer who can integrate PayPal into my codeigniter/php website using Express Checkout.

Requirements:
- Experience with codeigniter and php
- Knowledge of PayPal API and integration
- Ability to work with Express Checkout

Tasks:
- Integrate PayPal into the existing payment system
- Set up PayPal API credentials
- Implement Express Checkout for seamless payment processing

Skills:
- Proficiency in codeigniter and php
- Familiarity with PayPal API and Express Checkout

Please provide examples of previous PayPal integration projects you have worked on.