Languages: Python, SQL, C#, JavaScript, Java
Data Engineering: Databricks, Spark, PySpark, dbt, Airflow, Delta Lake, TeamCity, Dagster
Machine Learning: Scikit-learn, TensorFlow, RAG, LLMs
Databases: SQL Server, PostgreSQL, Data Modeling (Inmon, Kimball)
Cloud & DevOps: Azure, AWS, K8s, Docker, Git, CI/CD, Vercel
AI Tools: Claude Code, GPT Codex, Cursor, Exa, OpenClaw