Data Engineer • Mentor • Speaker

I build reliable data platforms, practical ETL/ELT pipelines, and analytics foundations that help teams move faster with more trust in their data.

I'm a Data Engineer from Indonesia with experience across Fintech and Digital Banking. I enjoy building dependable pipelines, warehouse layers, and data workflows that are practical, observable, and easy for teams to trust.

My core stack includes Python, SQL, Scala, Spark/PySpark, Airflow, dbt, Kafka/Confluent, BigQuery, and GCP.

• Built SQLTerrain, a local-first SQL engineering workbench validated with 10,000 benchmark cases and 1,200+ real SQL conversion tests
• Engineered a config-driven data quality pipeline processing ~14M rows in ~11 minutes with 12K+ validation checks per run
• Re-architected production ingestion and ETL workflows using Python, Spark, Airflow, dbt, and Kafka, reducing multi-hour runtimes to minutes
• Designed reusable data platform patterns for data quality, observability, schema evolution, governance, and privacy-aware data delivery

I also mentor and teach aspiring data professionals, contribute to technical learning programs, and occasionally speak about practical data engineering and analytics.

• Website: caesarmar.io
• LinkedIn: https://caesarmar.io/linkedin
• Medium: https://caesarmar.io/medium
• Email: hello@caesarmar.io

Fortune favors the bold.