Jacek Laskowski

Small Business Owner, Software Engineer, and Consultant in Warsaw, Poland

Read my book

Jacek is an IT freelancer specializing in Apache Spark, Delta Lake, Apache Kafka (with brief forays into a wider data engineering space, e.g. Trino and ksqlDB).

Jacek offers software development and consultancy services with very hands-on in-depth workshops and mentoring.

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

You can click the button above to read my book. If you’d like to get in touch, feel free to say hello through any of the social links below.