To shift from ETL Developer to Data Engineer, enhance skills in data infrastructure, big data tools (e.g., Hadoop, Spark), cloud platforms (AWS, Azure, GCP), databases (SQL, NoSQL), data modeling, programming (Python, Java), and collaboration with data scientists.
If you are interested to get into this field, then check out this video about Badhri and how he grabbed a job as a Data Engineer just after completing Artificial Intelligence Course Online.