data warehouses , Java, Kafka, Hive, Dashboards, Presto, Backend Engineering, Python, Spark, Reporting, evaluation frameworks, AI application engineering, metrics systems, OLAP systems, semantic layers, RAG Tool Calling Agents, Flink, Prompt Engineering, platform engineering, SQL data modeling, Trino, StarRocks, inference optimization, guardrails, Go, ClickHouse, data infrastructure, lakehouses