PRESTIA AI SaaS Platform Full-Stack Developer
Budget / Salary$30–250
TypeFreelance project
LocationRemote
Posted2 hours ago
Required: Senior Full-Stack Next.js Developer – High-Conversion SaaS Platform (PRESTIA AI)
Project Overview:
We are building the core foundation (MVP & SaaS Tier) for PRESTIA AI Platform—a high-converting, scalable B2B AI Automation & Sales Engine targeting the US, Gulf, and global markets. We require a world-class Senior Full-Stack Developer to build a bulletproof, high-converting, and ultra-user-friendly SaaS platform built for self-funding and aggressive scaling.
Contract Type: All-inclusive Fixed Price – 30 Days – Final Delivery Deployed in Owner’s Accounts
Core Focus: Extreme Conversion (High-Conversion Funnels) + Maximum Ease of Use (UX/UI) + Production-Grade Payment Architecture
1. Key Strategic Pillars to Achieve in This Build
Pillar 1: High-Conversion Engine (Built to Convert)
Dedicated High-Converting Landing Pages: Modular landing page architectures matching ad hooks directly to offers (Zero distraction, optimized for instant conversion).
High-Converting Funnel Mechanics: Multi-step conditional checkout, order bumps, one-click upsells/downsells, and immediate friction-free onboarding.
Live Social Proof & Demo Widgets: Interactive 60-second video demo placeholders, live interactive preview widgets, and dynamic trust triggers.
Pillar 2: High-Value & High-Demand B2B Services (Pre-Configured Offers)
5 Core High-Ticket & SaaS Pricing Tiers:
ACQUIRE: AI Lead Capture & Initial Qualification
CONVERT: AI WhatsApp & Social Media Sales Agent (Fast 30s Response)
AUTOMATE: Appointment Setting & CRM Workflow Orchestration
RETAIN: AI Database Reactivation Engine
REVENUE OS: Full Enterprise Suite (Setup Fee + Monthly Retainer Engine)
Sales Optimization System: Dynamic support for 30 Add-on Services, 5 Order Bumps, and Conditional Upsell/Downsell Flows (One-Click Billing).
Multi-Currency & Billing Options: Dynamic USD / SAR / AED / EGP toggle with Monthly/Annual subscription switches (with instant discount badges).
Pillar 3: Intuitive Ease of Use & Frictionless UX (Admin & Client Dashboard)
Self-Serve Onboarding: 3-step setup wizard (Zero technical jargon for end-users).
Single-Dashboard Control: Intuitive client portal to monitor AI conversations, booked appointments, and lead statuses in real-time.
No-Code Configuration Panel: Simple form-based prompts where business owners can customize their AI Sales Agent rules without touching any code.
2. Scope of Work & Technical Architecture
Pages & Structure: 6 Core Layout Templates serving 10 Main Pages + 18–22 High-Converting Sales Funnel Paths.
Languages & RTL: English / Arabic + Native True RTL Support + Seamless Responsive UI (Mobile-First).
Tech Stack (STRICT & NON-NEGOTIABLE):
Frontend: Next.js 14 App Router + TypeScript + Tailwind CSS
Backend & DB: Supabase (Auth, Database, RLS Security Policies)
Payments & Billing: Stripe Elements & Payment Intents + PayPal Vault (Off-session & One-Click Billing)
Integrations: GoHighLevel (GHL) Webhooks, OpenAI API connectors, Make/n8n webhook endpoints.
Deployment: Vercel Production Environment
STRICTLY FORBIDDEN: WordPress, Elementor, Bootstrap, or Pre-made bloated templates.
3. Core Developer Responsibilities & Security Standards
Payment Security & Idempotency:
Server-side price verification ONLY (Zero front-end price manipulation).
Webhook processing with idempotency keys to prevent double charging.
Stripe / PayPal Vault implementation for explicit recurring charges and seamless 1-click upsells.
Zero credit card data stored locally.
Database & API Security:
Strict Row Level Security (RLS) policies on Supabase.
Secure API Key Vaulting and server-side rate limiting.
Performance Metrics:
LCP < 2.5s | INP < 200ms | CLS < 0.1 (Optimized Core Web Vitals for maximum ad conversion).
4. Terms, Timeline, & Handover Guarantees
Fixed Price: All-inclusive budget stated upfront (No hidden costs or scope creep fee requests).
Timeline: 30 Calendar Days (Milestone-based delivery with 3 Loom video progress updates per week).
Warranty: 180 Days of free post-launch support (Critical bugs resolved within 24 hours).
Full Ownership Transfer: 100% Codebase, GitHub Repository, Supabase Migrations, Documentation, and Vercel Deployment transferred to Owner's primary accounts.
Final Acceptance: Handover is approved ONLY after passing 10 documented Acceptance Tests (Pass/Fail with Loom video evidence).
5. Application Instructions (Incomplete Proposals Will Be Automatically Rejected)
To apply, you MUST start your proposal strictly using this exact template. Applications omitting this format will be declined immediately:
I agree to the full scope, acceptance tests, and 30-day timeline: [Yes/No]
Fixed Price Proposal: $___
Timeline: ___ Days
180-Day Post-Launch Warranty: [Agree / Disagree]
3 Live Projects demonstrating Next.js 14 + Payment Webhooks + High-Converting Funnels:
1. [Direct Link] - My Role: ___________
2. [Direct Link] - My Role: ___________
3. [Direct Link] - My Role: ___________
Loom Demo / Video Proof of Webhook & Funnel Verification: [Link]
Exceptions / Additional Scope Clarifications: [None / Specify if any]
Project Overview:
We are building the core foundation (MVP & SaaS Tier) for PRESTIA AI Platform—a high-converting, scalable B2B AI Automation & Sales Engine targeting the US, Gulf, and global markets. We require a world-class Senior Full-Stack Developer to build a bulletproof, high-converting, and ultra-user-friendly SaaS platform built for self-funding and aggressive scaling.
Contract Type: All-inclusive Fixed Price – 30 Days – Final Delivery Deployed in Owner’s Accounts
Core Focus: Extreme Conversion (High-Conversion Funnels) + Maximum Ease of Use (UX/UI) + Production-Grade Payment Architecture
1. Key Strategic Pillars to Achieve in This Build
Pillar 1: High-Conversion Engine (Built to Convert)
Dedicated High-Converting Landing Pages: Modular landing page architectures matching ad hooks directly to offers (Zero distraction, optimized for instant conversion).
High-Converting Funnel Mechanics: Multi-step conditional checkout, order bumps, one-click upsells/downsells, and immediate friction-free onboarding.
Live Social Proof & Demo Widgets: Interactive 60-second video demo placeholders, live interactive preview widgets, and dynamic trust triggers.
Pillar 2: High-Value & High-Demand B2B Services (Pre-Configured Offers)
5 Core High-Ticket & SaaS Pricing Tiers:
ACQUIRE: AI Lead Capture & Initial Qualification
CONVERT: AI WhatsApp & Social Media Sales Agent (Fast 30s Response)
AUTOMATE: Appointment Setting & CRM Workflow Orchestration
RETAIN: AI Database Reactivation Engine
REVENUE OS: Full Enterprise Suite (Setup Fee + Monthly Retainer Engine)
Sales Optimization System: Dynamic support for 30 Add-on Services, 5 Order Bumps, and Conditional Upsell/Downsell Flows (One-Click Billing).
Multi-Currency & Billing Options: Dynamic USD / SAR / AED / EGP toggle with Monthly/Annual subscription switches (with instant discount badges).
Pillar 3: Intuitive Ease of Use & Frictionless UX (Admin & Client Dashboard)
Self-Serve Onboarding: 3-step setup wizard (Zero technical jargon for end-users).
Single-Dashboard Control: Intuitive client portal to monitor AI conversations, booked appointments, and lead statuses in real-time.
No-Code Configuration Panel: Simple form-based prompts where business owners can customize their AI Sales Agent rules without touching any code.
2. Scope of Work & Technical Architecture
Pages & Structure: 6 Core Layout Templates serving 10 Main Pages + 18–22 High-Converting Sales Funnel Paths.
Languages & RTL: English / Arabic + Native True RTL Support + Seamless Responsive UI (Mobile-First).
Tech Stack (STRICT & NON-NEGOTIABLE):
Frontend: Next.js 14 App Router + TypeScript + Tailwind CSS
Backend & DB: Supabase (Auth, Database, RLS Security Policies)
Payments & Billing: Stripe Elements & Payment Intents + PayPal Vault (Off-session & One-Click Billing)
Integrations: GoHighLevel (GHL) Webhooks, OpenAI API connectors, Make/n8n webhook endpoints.
Deployment: Vercel Production Environment
STRICTLY FORBIDDEN: WordPress, Elementor, Bootstrap, or Pre-made bloated templates.
3. Core Developer Responsibilities & Security Standards
Payment Security & Idempotency:
Server-side price verification ONLY (Zero front-end price manipulation).
Webhook processing with idempotency keys to prevent double charging.
Stripe / PayPal Vault implementation for explicit recurring charges and seamless 1-click upsells.
Zero credit card data stored locally.
Database & API Security:
Strict Row Level Security (RLS) policies on Supabase.
Secure API Key Vaulting and server-side rate limiting.
Performance Metrics:
LCP < 2.5s | INP < 200ms | CLS < 0.1 (Optimized Core Web Vitals for maximum ad conversion).
4. Terms, Timeline, & Handover Guarantees
Fixed Price: All-inclusive budget stated upfront (No hidden costs or scope creep fee requests).
Timeline: 30 Calendar Days (Milestone-based delivery with 3 Loom video progress updates per week).
Warranty: 180 Days of free post-launch support (Critical bugs resolved within 24 hours).
Full Ownership Transfer: 100% Codebase, GitHub Repository, Supabase Migrations, Documentation, and Vercel Deployment transferred to Owner's primary accounts.
Final Acceptance: Handover is approved ONLY after passing 10 documented Acceptance Tests (Pass/Fail with Loom video evidence).
5. Application Instructions (Incomplete Proposals Will Be Automatically Rejected)
To apply, you MUST start your proposal strictly using this exact template. Applications omitting this format will be declined immediately:
I agree to the full scope, acceptance tests, and 30-day timeline: [Yes/No]
Fixed Price Proposal: $___
Timeline: ___ Days
180-Day Post-Launch Warranty: [Agree / Disagree]
3 Live Projects demonstrating Next.js 14 + Payment Webhooks + High-Converting Funnels:
1. [Direct Link] - My Role: ___________
2. [Direct Link] - My Role: ___________
3. [Direct Link] - My Role: ___________
Loom Demo / Video Proof of Webhook & Funnel Verification: [Link]
Exceptions / Additional Scope Clarifications: [None / Specify if any]
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