Selected Projects

End-to-end self-serve AI platform with 15+ LangGraph agents that automate data ingestion, transformation, ML model training, and on-demand analytics. Features a natural language interface that converts questions into SQL, charts, and narrative explanations through a multi-agent decision routing system.

Enterprise SaaS for AI-powered document intelligence with dual-mode adaptive RAG. Agentic LangGraph pipelines mimic how human analysts work: search for content, flip to specific pages for visual analysis, reflect on coverage, then extract with confidence scores and source citations.

Stateless middleware that protects LLM applications with a progressive 5-layer input guard and 4-layer output guard. Uses a fast-first architecture: regex at ~2ms catches obvious attacks, BERT at ~150ms handles semantic threats, and LLM judge at ~2s resolves edge cases -- keeping median latency low.

Income estimation model (MAPE ~25%) and loan screening model (AUC 0.75) built on millions of national credit records. Includes a 6TB PostgreSQL data warehouse with daily ETL replication and an internal MLOps platform prototype with automated feature selection.

Telegram bot that monitors Shopee Malaysia for price drops, stock changes, and new listings using a CDP capture-and-replay technique. Drives a real Chrome browser to intercept Shopee's internal API calls, then replays them server-side with live session cookies to bypass anti-bot detection.

Two-tier email relay system replacing 60+ manually-rotated Gmail accounts for a debt collection agency. Tier A uses Postfix with a custom Python round-robin daemon for automatic Gmail account rotation. Accompanied by a reusable 8-role Ansible VPS provisioning toolkit with security hardening.

Full-stack serverless business management system for an SME equipment company. Covers sales CRM, invoicing, test weight rental management with automated overdue detection, mobile signature capture via JWT-secured links, purchase order tracking with delivery variance detection, and LHDN MyInvois e-invoicing compliance.

Full-stack ticketing platform with integrated payment processing (Billplz), QR code ticket generation, dual check-in flows (staff scanner + self-service), and admin analytics dashboard. Features privacy-first NRIC handling with SHA-256 hashing and HMAC-verified payment webhooks.