VeloxKV GitHub Repository Card
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VeloxKV • Non-Blocking In-Memory Key-Value Store

High-performance, single-threaded, non-blocking key-value cache server in Modern C++17 with LRU eviction and threadless TTL.

Modern C++17 POSIX poll() Non-Blocking I/O Lock-Free LRU Engine Threadless TTL
  • Asynchronous Non-Blocking I/O: Built on POSIX poll() event multiplexing on non-blocking sockets (O_NONBLOCK), handling thousands of concurrent client connections on a single OS thread with zero lock contention.
  • Lock-Free Cache Engine: Engineered an integrated LRU eviction cache combining std::unordered_map for O(1) hash lookups with a sentinel doubly-linked list for O(1) recency updates and zero virtual call indirection.
  • Threadless TTL Expiration: Designed a dual-mode expiration manager combining passive checks upon read access with active stochastic non-blocking sampling, eliminating background thread overhead.
  • Custom Text Protocol: Implemented a line-buffered streaming parser supporting SET, GET, DEL, STATS (hits, misses, hit-rate, evictions), and INFO commands.
Room Chat GitHub Repository Card
Source Code ↗

Room Chat • Real-Time Chat Platform

Real-time messaging platform enabling instant creation of isolated, passcode-protected chat rooms with persistent histories.

TypeScript Node.js Socket.IO PostgreSQL Prisma ORM Docker
  • WebSocket Broadcasting: Engineered an event-driven chat system with Socket.IO delivering sub-millisecond broadcast latency across dynamically joined rooms.
  • Passcode Protection & Room Security: Created fine-grained room lifecycles and hashed passcode validation enforcing private, segregated communication.
  • Presence & Persistent State: Implemented real-time typing indicators, user presence tracking, and relational chat history using PostgreSQL and Prisma ORM.
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