- Apache OpenWhisk Contributor
- DevOps: Kubernetes, Docker, Ansible, Terraform
- Cloud: AWS, Google Cloud, Azure, Linode
- Virtualization: Xen, Vmware, VirtualBox
- BigData: Hadoop, Spark, Kafka, Cassandra
- Java, Scala and Kotlin, playing with the JVM since Java alpha (pre 1.0) in 1996
- Functional Programming: Scala, Haskell, Erlang, Lisp
- Scripting: JavaScript, Python, Perl
- Certified Oracle Master for JEE5 and Sun Certified Java Programmer since 2000
- Published Technical Author and Trainer (2 books, 100+ trainings, 100+ articles)
- Databases: CouchDB, Cassandra, Oracle, MySQL, Postgresql
- Techniques: UML, Agile (Scrum, Kanban), TDD and BDD
- Unix/Linux: celebrating 25 years of happy hacking (since 1990, started with Linux on 1993)
- Scala: 5 years, Akka, Play, Spark, Kafka
- J2EE: 15 years, JBoss, Weblogic, Tomcat, Resin, Jetty
- Java: 20 years, Spring, Gwt, JSF, Hibernate/JPA (and many others, started with Java alpha on 1990)
- Oracle WebCenter Sites (formerly Fatwire) expert, more than 10 years of experience