Python for DE: Data structures, file handling, and working with APIs.
Advanced SQL: Complex joins, window functions, and query optimization.
Relational Databases (RDBMS): Designing schemas in PostgreSQL or MySQL.
NoSQL Systems: Understanding MongoDB and Cassandra for unstructured data.
The Lifecycle: Data collection, cleaning, transformation, and delivery.
Data Architecture: Introduction to Data Lakes (S3, Azure Data Lake) vs. Data Warehouses.
ETL vs. ELT: Understanding Extract, Transform, and Load methodologies.
Pipeline Orchestration: Using Apache Airflow to schedule and monitor workflows.
Data Transformation: Using dbt (data build tool) for modular SQL transformations.
Cloud Providers: Specialized training in AWS, Azure, or GCP.
Modern Warehousing: Scaling storage and compute with Snowflake, BigQuery, or Redshift.
Storage Optimization: Managing S3 buckets and GCS for scalable data lakes.
Stream Processing: Handling real-time data feeds with Apache Kafka.
Scaling Systems: Reducing latency and maintaining performance as data grows.
Portfolio Projects: * Build a complete end-to-end ETL Pipeline.
Soft Skills: Collaboration with Data Scientists and Analysts and problem-solving.
Recommended Reading: Study "Designing Data-Intensive Applications" by Martin Kleppmann.

Elite Data Engineer