I am an IT freelancer specializing in apache-spark, delta-lake, apache-kafka, kafka-streams, ksqldb. I offer consultancy, courses, workshops, mentoring and software development services.

Contact me at [email protected] or DM me on twitter @jaceklaskowski.

I'm best known by "The Internals Of" online books available free of charge at https://books.japila.pl/.

I run Warsaw Data Engineering meetup.