LLM APIs, prompt engineering, RAG architectures, agentic patterns, vector databases (Chroma, Weaviate, pgvector), orchestration frameworks (LangGraph, Agno, CrewAI), LLM observability (Phoenix, LangFuse, LangSmith). Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.