Karthikeyan J
I build scalable backend systems and AI powered applications.
From APIs to automation tools, I create systems that solve real-world problems.
Featured Projects
Insight AI Studio
Universal Database & Table AI Studio with safe read-only AST SQL and automated KPI analytics.
Tech:TypeScript • Next.js • PostgreSQL • AST SQL
Devnix Cloud IDE & Engine
Run code in 11+ languages with interactive live terminal, stdin support, and Judge execution.
Tech:Next.js • Judge0 Engine • TypeScript • WebSockets
Second Brain AI
Intelligent personal knowledge base to capture notes, manage tasks, and query thoughts with AI.
Tech:Next.js • React • TypeScript • LangChain
Buddy AI Companion
Sovereign local-first AI companion with BYO-model keys, contextual RAG memory, and voice dictation.
Tech:Python • RAG / Vector DB • Telegram API • Voice AI
GitHub Drive Cloud Storage
High-fidelity personal cloud drive system converting GitHub repos into encrypted file storage.
Tech:Next.js • GitHub API • TypeScript • Encryption