An ETL Informatica Developer designs, develops, and maintains ETL processes to extract, transform, and load data from various sources into data warehouses. They ensure data quality, optimize performance, and streamline data flows critical for analytics. Key skills include proficiency in Informatica, SQL, and data modeling. Collaborating with data architects and analysts, they thrive in dynamic environments, driving insights for decision-making. Career progression may lead to roles like Data Architect or Business Intelligence Lead, emphasizing their integral role in data strategy and organizational success.