Senior Full-Stack Developer Wanted

* Senior Full-Stack Developer Wanted: Build the MVP for PRESTIA AI We are seeking an elite, execution-focused Senior Full-Stack Developer to build the Minimum Viable Product (MVP) for PRESTIA AI—a high-converting SaaS platform featuring a dynamic sales, payment, and post-purchase upsell engine. * Required Tech Stack We maintain strict engineering standards. You will develop directly on our infrastructure using: Framework: Next.js 14 (App Router) + TypeScript Styling & UI: Tailwind CSS (Unified, high-converting interfaces with full RTL/English support via next-intl) Database & Backend: Supabase (PostgreSQL, Auth, RLS, Webhooks) Payments & Billing: Stripe (Checkout, Tokenization/Setup Intents, Webhooks) + PayPal Vault Hosting & Version Control: Vercel + GitHub (Direct execution on the owner's accounts) Note: WordPress, Elementor, Bootstrap, or pre-built legacy templates are strictly prohibited. We build modern, serverless web applications. * MVP Scope of Work 1. High-Converting Page Architecture (3 Core Layouts) Landing & Solutions: Home Page + Core Solutions Showcase. Sales Funnel Engine: Pricing + Checkout + Multi-Step Upsell/Downsell + Thank You Page. Legal & Compliance: Dynamic Legal Pages Template (Terms, Privacy, Refund Policy). 2. Plans & Subscription Management Configure 3 core subscription tiers (Starter / Growth / Enterprise). Support for flexible Monthly / Yearly billing cycles in USD. 3. Dynamic Sales & Checkout Engine Order Bumps: Program 3x distinct, real-time Order Bumps directly on the checkout screen. 1-Click Post-Purchase Upsells: Build a dynamic upsell/downsell engine supporting sequences of up to 10–15 steps without re-entering card details (leveraging Stripe Tokenization / Off-Session Payment Intents). 4. Integrations, Security & Backend 100% server-side payment processing and robust Stripe webhook event handlers. Secure Supabase synchronization for accounts, order histories, and active subscription state management. * Delivery & Quality Standards Environment: Direct commits and deployment on our official GitHub repository and Vercel project. Documentation: Clean, modular TypeScript code with a clear README.md explaining setup and architecture. Verification: A 5–10 minute Loom video walkthrough proving test purchases, 1-click upsell routing, and secure Stripe webhook processing in test mode. * Payment Milestones & Warranty Terms Payments will be released via escrow structured across 3 core milestones: MilestoneDeliverablesTimelineEscrow ReleaseMilestone 1Stripe integration finalized + Front-end interfaces connected15 Days25%Milestone 2End-to-end testing, bug fixes, and final production delivery15 Days50%Milestone 3Completion of the 180-day Warranty Period180 Days25% * 180-Day Comprehensive Warranty: Includes full bug fixing with a guaranteed response time of 24–48 hours post-launch. * Application Requirements To apply, please provide the following details: Links to 3 LIVE projects you built using Next.js + Stripe Checkout / Tokenization. Your proposed Fixed Budget ($___). Your confirmed Delivery Timeline (___ Days). Explicit confirmation of your agreement to the 180-day warranty terms. * Proposals that do not meet all required criteria or miss live project links will be automatically disregarded.