I enjoy sharing knowledge in form of blog posts, books, conference talks. Some of the content that I have written can be found in the following places:
Solr.pl – Site dedicated to Apache Solr where I share quicker and longer tips on working with that Apache Lucene based search engine.
Sematext.com/blog – The blog of Sematext, the company I work for, for some time now. You can find articles written by me (and not only) about Solr, Elasticsearch, performance, monitoring, observability, natural language processing and many, many more.
rafal-kuc.medium.com – Technical articles, personal thoughts on various topics, basically everything that I think may be valuable.