Production-grade Multi-Tenant SaaS ERP Platform
(HRMS, Payroll with full Indian statutory compliance — PF/ESI/PT/TDS, Project Management, Real-time Chat, Drive, Billing & Approval modules)
- Designed 120+ MySQL relational models using Sequelize ORM with strict tenant isolation
- Built 2,200+ LOC payroll engine supporting pro-rated salaries, tax slabs and event-driven workflows
- Engineered scalable backend with Express.js, BullMQ + Redis job queues, Socket.IO real-time features, RBAC, dual JWT auth, AWS S3 storage and clean EventBus architecture
Online Auction System
Live Demo: https://auction.ihavetech.com
Production real-time MERN auction platform featuring:
- Socket.IO rooms + atomic MongoDB updates (prevents race conditions)
- Auto-winner detection on timer expiry
- Secure JWT + httpOnly cookies + full admin dashboard
- IP/geo/device login tracking + Cloudinary uploads
- URL Shortener — MERN analytics dashboard with QR codes
- All projects & live demos: theavnishkumar.in
- Technical articles on backend architecture & real-time systems: ihavetech.com
- Latest Resume: Download PDF
Multi-Tenant SaaS Architecture, Node.js Backend Engineering, Real-time Systems, Indian Payroll Compliance, System Design, Sequelize + MySQL Scaling
