This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Data Engineer - ETL | Data Integration based in United States. This is a hands-on data engineering opportunity focused on stabilizing and scaling production-grade data pipelines that support analytics and reporting. You will take ownership of complex integrations spanning multiple structured and unstructured data sources and operational systems. The role combines ETL/ELT engineering, API integration, data modeling, data quality, and platform reliability. You will design efficient incremental and change-data-capture workflows while ensuring data remains accurate, secure, and analytics-ready. Working independently, you will help establish scalable data integration standards and improve the long-term sustainability of the platform. Your work will directly enable analytics teams to spend more time generating insights and less time resolving data issues. This is a pro-bono volunteer role requiring a minimum six-month commitment of approximately six flexible hours per week.