A Node.js/Express backend service processing cybersecurity documents into vector embeddings for semantic retrieval and context-grounded LLM response generation.

• ■Building a Node.js/Express pipeline that processes documents into chunks and generates embeddings for each chunk
• ■Storing embeddings in a vector database for semantic retrieval against incoming natural-language queries
• ■Designed a retrieve-then-generate API flow that passes relevant context to an LLM so answers stay grounded in source documents
• ■Evaluating prompt injection and over-permissioned tool calling while integrating LLM APIs and tool calling into the backend

A full-stack community platform built with React, Node.js/Express REST API, PostgreSQL, and Prisma with JWT authentication and content validation.

• ■Built and deployed a full-stack community platform with a React frontend and Node.js/Express REST API backend
• ■Modeled posts, threaded discussions, reactions, and trust scoring with PostgreSQL and Prisma
• ■Implemented JWT authentication and authorization checks to protect user identity and restrict access to resources
• ■Hardened the API with rate limiting, Helmet security headers, and Prisma field-level selection to limit abuse and data exposure
• ■Added server-side content validation that detects emails, phone numbers, and personal links before persistence

A competitive programming platform that compiles submitted C++17 programs in controlled child processes and generates counterexamples.

• ■Built a full-stack platform with a React and TypeScript frontend and a Node.js/Express backend that generates counterexamples to expose incorrect logic in C++17 solutions
• ■Developed a server-side service that compiles submitted programs and evaluates generated inputs through controlled Node.js child processes
• ■Enforced execution timeouts and output limits to prevent runaway execution and uncontrolled output
• ■Validated inputs and applied resource constraints to test submissions safely against malformed, excessive, and adversarial inputs