One of the things that gives me a lot of satisfaction is doing integrations. One customer has a good architecture, and they chose to put their metrics database with billions of records in Apache Cassandra. Which is pretty cool! A business consultancy that is helping them grow a lot, has implemented PowerBI and the dashboards are really good, but the most important reports will be based on this gigantic Cassandra database. We just delivered a quick integration using Apache Spark. Small project, fast delivery and everyone happy. Is so good. Mission accomplished feeling.