Built and shipped end-to-end features across multiple projects, including a multimedia scene retrieval system that combines text search and audio speech-to-text with semantic vector similarity (pgvector) and ranked retrieval. Designed backend APIs with FastAPI and implemented responsive React interfaces with user/admin workflows. Delivered automatic scene clip generation with timestamps and metadata, and developed supporting pipelines for embeddings, search ranking, and media handling. Also created an end-to-end encryption visualizer using Flask and a step-by-step frontend that explains participant roles, encryption flow, and message transmission.