data engineering , Python, Sql, Etl, ELT, Data Cleaning, Data Transformation, Api Integration, Json, MongoDB, Neo4j, Ocr, Data Quality, Data Pipelines, Data Validation, RAG, Retrieval Augmented Generation, Vector Database, Qdrant, Embeddings, semantic search, Knowledge Graph, Cypher, Document Processing, Document Chunking, Metadata Extraction, Pipeline Monitoring