Jesper is a Danish programming language geek, who has been working with Erlang for about 10 years. He is generally interested in formal methods, self healing systems, fault tolerance, programming languages, distributed systems, concurrency, and parallelism. He likes to apply new theoretic research by finding a practical real-world application for the problem. Former works include BitTorrent clients in Erlang and Haskell, various load regulators for systems. Currently he is mostly interested in the application of property-based-testing to real systems and GraphQL implementations.