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1. geostream-orbital-engine geostream-orbital-engine Public

   High-performance hybrid backend for GeoStream. Features a Go API with CAS database locking and SSE, orchestrating Python micro-scripts for OpenCV/FFmpeg video rendering and Skyfield orbital tracking.

   Python 1

2. distributed-rate-limiter distributed-rate-limiter Public

   A production-grade distributed rate limiter built with Spring Boot and Redis Lua scripts to protect APIs from DDoS and abuse with ultra-low 14µs latency.

   Java 1

3. seatlock-booking-system seatlock-booking-system Public

   Concurrency-safe ticket booking backend with Optimistic Locking to prevent double booking under concurrent requests.

   Java 1

4. nexchat-realtime-messaging nexchat-realtime-messaging Public

   Production-grade real-time messaging backend with exactly-once delivery (Redis SETNX), sliding window rate limiting (Lua), cursor-based pagination, and AI-powered smart replies — sub-100ms P95 at 5…

   JavaScript 1

5. taskflow-ai-system taskflow-ai-system Public

   AI-augmented backend system with async LLM processing, Redis caching, and scalable architecture for intelligent task management. Integrates Google Gemini, AWS S3, JWT auth, and is k6 load-tested fo…

   Java 2

6. algorithms-and-data-structures algorithms-and-data-structures Public

   Comprehensive repository of data structures and algorithms problems organized by topic, with a focus on pattern-based problem solving in Java.

   Java 1