API design, Data Modeling, Nosql, Docker, Distributed Systems, AWS, concurrency, Backend Engineering, Sql, REST, Gcp, System Design, Azure, Kubernetes, vector databases, platform engineering, GRPC, retrieval systems, evaluation systems, RAG pipelines, LLMs, conversational AI, event-driven architectures, microservices architectures, prompting strategies, performance optimization, real-time processing, workflow orchestration engines