Case Details

Architected and developed a production-ready multi-tenant SaaS backend for legal document management and automation. Implemented comprehensive tenant isolation, role-based access control, and intelligent AI-powered document generation services. Built scalable infrastructure with asynchronous job processing, secure payment integration, and enterprise-grade document management with versioning and categorization.

Key Features

• •Multi-tenant SaaS architecture with tenant validation middleware
• •Role-based access control (RBAC) with JWT and Passport.js authentication
• •50+ database entities managed with TypeORM and PostgreSQL migration strategies
• •AI-powered document generation using OpenAI GPT-4/GPT-5 and Google Document AI
• •Intelligent legal notice creation with context-aware chatbot services
• •Conversation history management and token usage tracking
• •Subscription-based AI usage limits and billing
• •Razorpay payment gateway integration with webhook handling
• •Secure webhook signature verification and payment link generation
• •Recurring billing and transaction reconciliation for subscriptions
• •Asynchronous job processing with BullMQ and Redis
• •Scheduled reminders and email notifications via Nodemailer
• •Queue-based architecture for high-volume background operations
• •Google Cloud Storage integration with tenant isolation
• •Document management system with categorization and versioning
• •PDF generation using Puppeteer and pdf-lib for invoices and legal documents