🤖 AI-Powered API Security for Spring Boot — Just Add a Dependency.

SentinAI is a plug-and-play Spring Boot starter library that uses artificial intelligence to detect, analyze, and mitigate API security threats in real-time. It monitors incoming requests, identifies suspicious patterns like SQL injection, XSS, brute force attacks, and anomalous traffic — then automatically blocks or rate-limits malicious actors.

🚀 Deployed on Sonatype Maven Central — add it to any Spring Boot app with a single <dependency> in your pom.xml. Zero configuration required to get started.

🎟️ A high-performance, industry-standard ticket booking system that solves one of the hardest problems in distributed computing: handling thousands of users trying to book the same seat simultaneously.

Built with Spring Boot (backend), React (frontend), Redis (distributed caching & locking), MySQL (persistent storage), and RabbitMQ (async event processing). Uses a two-tier locking strategy — Redis-based optimistic locks for speed, followed by database-level pessimistic locks for consistency.

Features real-time seat status updates via WebSocket/STOMP so all connected users instantly see when a seat gets booked.

📬 A production-grade, enterprise-ready notification service supporting 4 delivery channels: Email, SMS, Push Notifications, and In-App messaging.

Engineered for high throughput and reliability with:

• Priority Queuing — urgent notifications bypass the queue and get delivered first
• Exponential Backoff Retry — failed deliveries are automatically retried with increasing delays
• Scheduled Delivery — queue notifications for future delivery at specific times
• User Preference Management — users control which channels they receive notifications on
• Intelligent Routing & Deduplication — prevents duplicate notifications and routes to the optimal channel
• Comprehensive Delivery Tracking — full audit trail for every notification across all channels

⚡ A production-grade, configurable Load Balancer built from scratch in Java / Spring Boot demonstrating deep understanding of networking, high availability, and system scalability.

Allows runtime algorithm selection via a simple property change or REST API call — no restart required:

• Round Robin — distributes requests equally across servers
• Weighted Round Robin — sends more traffic to higher-capacity servers
• Least Connections — routes to the server handling fewest active requests
• IP Hash — ensures the same client always reaches the same backend

Includes health checking, automatic failover, and real-time server pool management.

🎥 A full-featured Google Meet-inspired video conferencing application built with WebRTC for peer-to-peer real-time communication.

Features include:

• HD Video & Audio Calls — crystal-clear peer-to-peer media streaming
• Screen Sharing — share your entire screen or specific application windows
• Real-Time Chat — text messaging alongside video calls
• Room Management — create, join, and manage meeting rooms with unique codes
• Signaling Server — custom-built signaling for WebRTC handshake & ICE candidate exchange

Demonstrates mastery of WebRTC, WebSocket, STUN/TURN servers, SDP negotiation, and modern real-time web standards.