Back-end and middleware software solutions development targeting different OS like Linux, Mac OSX, Windows. Using environments and frameworks like JEE/J2EE and .NET and using procedural languages like C - object-oriented languages like C++, Java, C# - functional languages like Lisp and F# and scripting languages like Python, Perl, and Javascript. Also including classic RDBMS development (Oracle, MySQL, Postgres, DB2, SQL Server) as well as NoSQL databases development (Hadoop, Redis, CosmosDB, MongoDB, Couchbase)