From Messy Queries to Scalable Systems - How Data Engineering actually works

I started my tenure at E.ON Energy Deutschland as a Business Analyst in a small BI team and currently am a lead Data engineer in the Data Engineering team. In my talk I would like to showcase the importance of Data Engineering and explore how ad hoc analytics at E.ON evolved into reliable data systems. I would like to uncover how good Data engineering practises turn ad hoc analytic queries into scalable data platforms and improve not just performance and cost but also collaboration, trust and developer experience.