socket.io , Spring Boot, React, Typescript, Azure Functions, Jest, Python, Websocket, Java, FastAPI, Rest Apis, PgVector, Pinecone, Retrieval-Augmented Generation, LangGraph, Netflix DGS, Large Language Models, React Testing Library, LangChain, Redux Toolkit, Azure OpenAI Service, Server-Sent Events, Object-Oriented design, Milvus, OpenAI, Weaviate, LlamaIndex, Zustand, React Query, Azure Kubernetes Service