A full-stack MERN toolkit with SVG-based interactive visualizers for trees, graphs, arrays, linked lists, stacks and queues — plus AI code review powered by Groq's LLaMA 3.3-70B. Ships with a real auth system, a MongoDB-backed dashboard, and streak/badge tracking to keep developers engaged. Front end is fully custom-themed with no external UI libraries — including a hand-drawn SVG logomark and hamburger nav.

• Rewired the entire front end off localStorage mocks onto real Express endpoints
• Fixed a Groq JSON parsing crash at token limits using a repair-and-fallback strategy
• Built Stack, Queue and Dashboard visualizer components from the ground up

A real-time USB/HID monitoring tool that detects newly connected external devices and gates system-level access behind a password prompt — simulating the endpoint security controls used in enterprise IT. Built an event-driven polling loop to catch connect/disconnect activity as it happens.

• Live device polling with Psutil to flag unauthorized hardware the moment it connects
• Tkinter GUI gate for password verification before storage access is granted

Deep-dived into a large-scale sales dataset using joins, CTEs, subqueries, window functions and aggregations to surface sales trends, top-performing products, customer behaviour and regional performance — turning raw rows into decisions a business could actually act on.