AWS as deployment substrate — working fluency in the AWS AI and data services that underpin platform deployments: Amazon Bedrock, Amazon Q, SageMaker including Unified Studio, AWS Glue, Redshift, EMR, QuickSight with Q, plus Databricks on AWS, Snowflake on AWS, Apache Iceberg, and Delta Lake. AI and LLM engineering — prompt engineering, fine-tuning, model distillation, RAG implementation (LlamaIndex, Haystack), multi-agent orchestration (LangChain, LangGraph, CrewAI), vector databases (Pinecone, Weaviate, AstraDB), and AI evaluation frameworks.