I need a focused round of functionality work on my existing site: specifically, I want to add a robust checkout flow that supports both PayPal and Stripe. The core pages and products are already live; what’s missing is the ability for users to complete their purchase without leaving the site. Here’s how I picture the engagement: • Integrate PayPal and Stripe side-by-side, letting customers choose their preferred option at checkout. • Configure sandbox credentials first, run end-to-end tests (success, fail, cancel, refund) and then switch to live keys. • Make only minimal front-end adjustments—just enough to surface the buttons cleanly and display transaction feedback. • Keep the existing database structure intact; only store what is required for compliance. I’m using a standard LAMP stack on a VPS, Git for version control, and cPanel for deployment. If you’re comfortable working in that environment, this should be straightforward. Clean, well-commented PHP or JavaScript SDK usage is essential, and I’ll review the commits before we push to production. Timing is flexible within a week once we start; let me know if there’s anything else you need from my side.