Try to answer the question "Why my Java web site is f***ing slow?" by diving in Jmeter, Gatling, and VisualVM. In my free time, I train people on Java Spring framework eco-system, Python, Perl, Scala, AWS architecture, Docker, Rancher, Openshift, Ansible, Linux, PostgreSQL, MongoDB, Zabbix, DevOps tools stack and database migration Oracle/PostgreSQL.