Big Data Techs : Hadoop, Map-Reduce, HDFS, Hadoop Streaming, Pig, Hive, Sqoop, Oozie, S3, Alluxio
Real Time processing : Apache Storm, Kafka, RabbitMQ,
Programming : Core Java, Scala, Ruby, Pig, Hive, Ruby on Rails, PHP, Bash, Python
Databases : MYSQL, HBase, Elastic-search, Oracle, MongoDB, TokyoCabinet, Hypertable etc
Web Techs : HTML, DHTML, JavaScript, CSS, AJAX, JQuery
Unit Test : PigUnit, JUnit, MRUnit, Rails test Framework
Development Tools : NetBeans, Eclipse, PHPMyadmin, Putty, Cygwin, SVN, Selenium, Git, Jira, Jenkins etc.
Servers : Apache, Mongrel, Webrick, Thin, Passenger.
Operating Systems : Windows, Linux, UNIX
Coursera certified for "Functional Programming Principles in Scala"
Have taken several training batches on Ruby, Big data techs.
Open source contributions: