Author of Apache Solr Cookbook series and Elasticsearch server books, father, Sematext consultant and co-founder of http://solr.pl blog where he tries to share his knowledge. Currently working as search consultant and software engineer at Sematext Group, Inc. Mainly focused on Lucene, Solr, Elasticsearch, Hadoop and Mahout.
Corporate-Design: Extragestaltung, Margarethe Hausstätter
Ilustration: cyan, Berlin