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In-Depth Portfolio of Technologies

Operating Systems

• Linux, UNIX (SunOS, Solaris, Aix)
  Linux is a very popular server system and accounts for a large portion of all web servers. However, Linux technologies are also used in desktop systems and particularly in cell phone software (e.g. Android).
• MS­Windows (MS­Windows 10, MS­Windows 7, MS­Windows XP, MS­Windows XP embedded, cygwin)

Programming Languages

• Scala & Akka
  Scala lends itself to high-performance applications, especially in combination with the Akka framework. Moreover, it enables programmers to write very dense yet readable code thanks to the elimination of "white noise" caused by boilerplate code snippets.
  
• Java: JSE (J2SE), JEE (J2EE), JMS, EJB, JSF, Servlets, Camel, Karaf, Fuse, Wildfly, Seam, JSP, RMI, JDBC, Hibernate, JPA, JUnit, TestNG, Swing, AWT, JasperReports, JMX, BSF, ant, maven, IntelliJ, Eclipse, JProfiler
  Many applications nowadays are developed using Java. For some years now, it has also been possible to develop high-performance server application with this technology.
  
• Clojure
  Lisp reborn for the JVM, a very functional language
  
• Other languages for Java VM: Clojure (see above), Groovy, Scala (see above), jRuby (see below)
  By now, Java VM is offering many appealing alternatives to Java itself, even though they still run on the same platform.
  
• Ruby: Ruby (up to 2.7), JRuby, machine-oriented functions for Win32 and Linux, Rails, integration of JRuby in Java
  Ruby has long been popular for allowing users to develop complete applications in no time. Beyond that, combining Ruby or JRuby with Java opens a world of possibilities to call machine-oriented functions and manipulate features so that they can be configured.
  
• Perl: Perl 5 (up to 5.32), Raku (former Perl 6), OO, CGI, DBI, Unix API, regular expressions
  Among other things, Perl lends itself to the handling of small tasks and everything related to the editing of text files or text data.
• HTML, XHTML, CSS, JavaScript, XML
• C: including Unix API, Oracle ProC
• Unix Shells: sh, bash, tcsh, ksh
• Lisp: Common Lisp, Emacs­Lisp, DSSSL, Clojure
• Assembler, Fortran, C#, Lua, C++

Databases

• Oracle: SQL, SQL*Plus, ProC, JDBC, PL/SQL
• PostgreSQL, mySQL, DB2, MS­SQLServer
• MongoDB
• CassandraDB

Miscellaneous

• Application servers: Jboss, Oracle WebLogicServer, WildFly, Fuse
• Network: TCP/IP, HTTP, HTTPS, Samba, LDAP, ssh, GSM
• Sourcecodemanagement: Git, SubVersion
• Design Tool (UML): Rational Rose, Together, Sparx Enterprise Architect, Astah
• Approaches: OOP, OOD, OOA, UML
• Cryptography, coding theory
• Secondary skills include: LibreOffice, MS­Office, MS­Project, TeX/LaTeX, Emacs

Additional Skills

• Combination savviness
  When you're after the optimal solution, tapping into in-depth knowledge of a large variety of technologies puts you ahead of the game, since the magic often lies in the clever mix and match.
• Security savviness
  Security is a key aspect of today's IT, and much effort is put into guaranteeing the greatest possible extent of it particularly on the network side of things. However, it is equally important to take security aspects into account while designing the architecture and developing applications.