Website QA Tester Needed: PHP Custom Site, Square Payments, & Shopify API Integration

We are looking for a meticulous and experienced QA Tester to thoroughly test our newly developed custom PHP e-commerce website (DainelyLab.com). The site features multi-lingual auto-detection, a fully responsive design, and integrates Square Payments for checkout. A critical component of this project is the backend integration: once a payment is successfully processed via Square, the order must be seamlessly generated inside our Shopify store via API. This is a fixed-bid project with a strict, lean budget. We need someone who can work efficiently to ensure a flawless user experience and rock-solid functionality before we go live. Key Responsibilities & Scope of Work: * Payment & Localization Testing: Verify that Square payments function correctly for customers worldwide across different currencies and regions. * Shopify API Workflow Testing: Confirm that post-payment API logic triggers flawlessly, correctly injecting the completed order details into Shopify. * Cross-Browser & Device Compatibility: Test responsiveness and UI/UX functionality across major desktop browsers and mobile devices (iOS/Android). * Localization/Language Testing: Ensure the auto-detection feature correctly switches languages based on user location/browser settings without breaking layout elements. * Edge Case & Security Check: Verify basic security handshakes (SSL, data validation) and input testing on forms to prevent broken orders. Deliverables: * A clear, structured Bug/Issue Log (Google Sheets or Notion) detailing any failed test cases, reproduction steps, and device specs. * Video recordings (Loom or similar) for any critical checkout or API synchronization bugs. Strong communication skills and an eye for detail. This is a fixed bid project. Please read the job description and place the correct bid amount (NOT A PLACE HOLDER) Thank you for your time.