I run an existing PHP-based website that needs several improvements to keep pace with our growing user base. The codebase is clean and well-documented, but I now need an experienced PHP developer who can dive in quickly, update a few core components, and add brand-new modules without breaking anything already in production. Here’s what I’d like tackled: • Payment gateway upgrade – review the current integration, switch or update the API as required, and make sure all callbacks, webhooks, and error handling work flawlessly in both sandbox and live environments. • Comprehensive transaction history – build a secure, filterable page that shows each payment’s date/time, amount, status, and any other relevant metadata we collect. • Order search – implement an intuitive search or filter mechanism so admins can instantly locate any order by ID, customer, date range, or status. • New feature modules – architect additional components (details to be shared once we start) with clean MVC structure so they plug into the site without rewriting existing logic. • Send Message to user with Whatsapp Key stack: PHP 7.4+, MySQL/MariaDB, JavaScript (vanilla or a light framework), Bootstrap for UI, and RESTful API principles. Git is in place for version control; branching discipline is a must. Everything should be tested end-to-end on a staging server before the final push to production. Clean, commented code and a concise deployment guide will be the final deliverables. If you’ve handled similar roll-outs—especially payment gateway migrations—I’d love to hear how you’d approach these tasks and roughly how long each piece might take.