I need a seasoned full-stack developer to take a green-field web application from concept to production. The core of the build is straightforward yet critical: secure user authentication, rock-solid payment processing, and fast, real-time updates that feel instantaneous to end users. Here’s how I picture the workflow: a modern, responsive front-end (React, Vue, or your preferred equivalent) talking to a clean REST or GraphQL API; authentication handled with best-practice flows (JWT, OAuth, or similar); payments integrated through Stripe, PayPal, or another gateway you can justify; and live data pushed over WebSockets or Server-Sent Events to keep the interface fresh without page reloads. I’ll provide Figma wireframes and copy; you’ll handle architecture, coding, testing, and deployment guidance. Deliverables • Source code in a Git repository with clear commits • A brief technical read-me covering setup, build, and deploy steps • Working auth flow (sign-up, login, password reset) • Payment gateway integration ready for live keys • Real-time update mechanism demonstrated on at least one data feed Acceptance criteria: passing automated tests, zero critical security issues flagged by OWASP ZAP, and a short screenshare walk-through proving the above features in action. If this aligns with your expertise, let’s talk through your proposed stack, timeline, and any questions you have.