Senior Full-Stack Developer — SaaS Completion, AI Integration and Production Hardening (Next.js + Stripe + AWS)

PROJECT OVERVIEW

This project is NOT starting from scratch.

The system is built on SaasPilot, which already provides:

Full authentication system
Stripe payment integration
SaaS architecture foundation
Scalable structure
Database integration
Email and storage systems

Additionally:

The entire UI/UX design is 100% completed and validated (Figma)
A functional codebase already exists
Core integrations are already in place

The project is currently in the phase of:

Finalization, correction, and production readiness.

CURRENT PROJECT STAGE

Based on technical analysis:

System is structurally built
Frontend is 70% to 80% complete
Backend is partially functional
Core integrations are already started
Main workflows are already defined

Real status:

“Advanced system, but incomplete and not yet production-ready”

WHAT ALREADY EXISTS (DO NOT REBUILD)
1. SaaS Base (SaasPilot)
Full authentication (login, OAuth, sessions)
Stripe integration (checkout, subscriptions)
Prisma ORM configured
Structured database (PostgreSQL or MongoDB)
Email system
S3 storage integration
Deployment ready (Vercel)
2. Frontend (Next.js + UI)

Approximately 70% to 80% completed:

Landing page
Dashboards (admin, user, provider)
Authentication system
Subscription pages
Marketplace interface
Bidding interface
User management
Account settings

Design is already defined and must not be structurally redesigned.

3. Backend (Partial)

Already implemented:

Prisma schema with core models
API routes created
Functional backend structure
Initial certification logic
Marketplace routes
Dashboard statistics
4. Functional Structure (Already Defined)
AI Certification
Initial structure exists
Workflow defined
Marketplace
Listing structure created
Partially implemented
Bidding System
Initial structure created
Workflow defined
Payments
Stripe integrated
Webhooks partially implemented
5. Design (100% Completed)
Full Figma design
All screens defined
UX validated

Important:

Redesign is NOT part of the scope.

WHAT IS MISSING (REAL WORK)
1. Fast Technical Audit
Validate real code status
Identify inconsistencies
Map incomplete parts

Deliverable:

Objective technical report
2. Fix Existing Logic
Broken workflows
Data inconsistencies
Integration issues

Main focus:

Payments
Core flows
Frontend and backend synchronization
3. Complete Existing Features
AI Certification (Complete)
Real AI implementation
JSON output
Vehicle Integrity Score
PDF report with QR code
Marketplace (Finalize)
Connect with certification
Filtering by score
Transaction history
Fully working flow
Bidding System (Finalize)
Proposals
Selection
Execution
Completion
Reputation system
Payments (Fix and Complete)
Stripe Checkout
Stripe Connect (split payments)
Full webhook handling
Functional escrow system
4. Full Integration
Frontend and backend integration
End to end working APIs
Removal of mocks and hardcoded logic
5. AI Implementation (Real)

Expected architecture:

Python with FastAPI
Microservices
Asynchronous processing using Redis and BullMQ
Containerized deployment

Suggested APIs:

OpenAI or equivalent for image analysis
Custom scoring services

Important:

Fake or simulated AI will not be accepted.

6. Production and Scalability
AWS (EC2, S3, CloudFront)
Redis (cache and queues)
CDN enabled
Prepared for autoscaling
WHAT IS NOT INCLUDED (SCOPE LOCK)

To avoid misinterpretation:

Not a new project
Not a redesign
Not a stack change
Not unnecessary full refactoring
Not open ended exploration
DELIVERY EXPECTATION

The system must be delivered:

Fully functional
Fully integrated
Tested
Production ready

Mandatory:

Video demonstrations of real workflows
System running in a real environment
GOVERNANCE (MANDATORY)
Daily commits on GitHub
Real progress only
Organized pull requests
Code must be auditable at any time
COMMERCIAL CLARIFICATION

This project already includes:

SaaS foundation
Completed design
Advanced codebase
Initial integrations

Therefore:

Pricing must reflect execution and completion, not building from scratch.

FINAL POSITIONING

This project is for developers who:

Can work with existing systems
Understand real SaaS architecture
Execute quickly and objectively

Not suitable for:

Beginners
Developers who require discovery phases
Developers who depend on long meetings to understand scope