I’m Tobias Petry. I live in Germany, where I work with databases.

In my first year of programming, I slowed down an application to multi-second response times with a single slow SQL query. This experience sparked my desire to learn all about databases and their performance. In the past 15+ years, I became a database expert with a lot of expertise in the architectures and quirks of many database systems. My favorite part of databases is that feeling, when you find and optimize all the slow queries that the application feels much more speedy afterward.

At present, I use most of my time working with databases: I help development teams fix their performance problems, teach advanced SQL features and build tools to better work with databases. As a full-stack developer and database engineer, I am the missing link between a developer's approach and the knowledge of a database expert to know more efficient ways to solve a problem.