Predrag has spent the last 8 years working on data systems covering almost every imaginable kind of data: from databases and APIs to unstructured data files. He built Trustfall, a universal query engine that can query any data sources, and cargo-semver-checks, a semantic versioning linter for Rust. Previously, Predrag was a principal engineer at Kensho Technologies, did performance engineering research at MIT, and competed in international math and programming competitions. In his free time, he enjoys playing ice hockey and board games.