Work
Point of Sales SaaS
Point of Sales Web Application - A multi-tenant SaaS POS platform designed with inventory, billing, staff, and analytics management for commercial operations.
Engineered secure REST APIs and real-time order updates using NestJS, Socket.io, PostgreSQL, Prisma ORM, & Redis. Implemented JWT authentication, AWS S3 media uploads, & interactive analytics dashboards.
- Multi-tenant SaaS model with strict data isolation per organization.
- Real-time billing updates and staff action broadcasts with Socket.io WebSockets.
- High-throughput relational schema with Prisma ORM and Redis query caching.
- Interactive revenue analytics and sales trends visualizer using ApexCharts.
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Invoice Generation Platform
Invoice Generation Platform (Personal SaaS Project) - Scalable invoice generation platform engineered for bulk asynchronous PDF processing using BullMQ & Redis.
Implemented CSV/Excel batch imports, customizable invoice templates, and secure cloud file storage with AWS S3. Built batch processing, automated retry mechanisms, and analytics for efficient generation.
- Asynchronous worker pool rendering pixel-perfect PDF invoices via headless Puppeteer.
- Bulk CSV/Excel client data parser with validation, chunking, and error reporting.
- Dead-letter queues, idempotent job scheduling, and exponential backoff retries with BullMQ.
- Encrypted multi-region document archival using AWS S3 pre-signed expiring links.