orchestration (e.g. Airflow, Dagster, Prefect), as distinct from analytics pipelines. Python and SQL at a high level, plus Bash automation. Cloud infrastructure, with AWS preferred (S3, Lambda, ECS, IAM); Snowflake and/or Databricks; Docker; CI/CD (GitHub Actions or similar); Infrastructure-as-Code (Terraform or CloudFormation). Record … linkage and entity matching across heterogeneous datasets. Data clean-room set-up and integration (Snowflake, AWS Clean Rooms, InfoSum, Databricks or similar). Geospatial data engineering: spatial SQL, geographic indexing, Census geographies, crosswalks and large-scale spatial joins. Database design and scaling: SQL, NoSQL, vector DBs (Pinecone, FAISS), graph ...