Name Proficiency Last year used ----------------------------------------------------------------------------------------------------------------- Ab Initio Expert 2009 Akka Basic 2015 Amazon Web Services (EC2, Fargate, S3, Lambda, SNS, SQS, Aurora, Dynamo, etc.) Advanced 2024 Angular Basic 2016 Ant Proficient 2016 Apache HDFS Basic 2015 Apache POI Proficient 2016 Apache Spark Advanced 2015 Apple Keynote, Pages, Numbers Proficient 2014 Application Server (Oracle, JBoss, Glassfish) Advanced 2016 AspectJ/AJDT Basic 2005 Atom Advanced 2016 Boost Library Advanced 2021 Bootstrap Proficient 2024 Business Intelligence and Reporting Tools (BIRT) Basic 2006 C/C++/C++ 11/C++ 14/C++ 17/C++ 20 Proficient 2021 Camunda BPMN Basic 2022 Cell Broadband Engine / Playstation 3 Advanced 2009 Chai Basic 2016 Clojure Advanced 2018 CouchDB Basic 2015 D3.js Advanced 2016 Data Science Proficient 2016 Docker Advanced 2024 ERwin Proficient 2007 Eclipse Expert 2016 Eclipse Modeling Framework (EMF) Expert 2008 Elasticsearch Basic 2016 Express Advanced 2016 GPU Computing: NVIDIA CUDA, OpenCL, C++ AMP Expert 2017 Go/Golang Advanced 2020 Gradle Advanced 2024 Grails Proficient 2012 Graphical Editor Framework (GEF) Advanced 2005 Groovy Expert 2020 Grunt Basic 2015 HTML, HTML5, XHTML, CSS, CSS3 Proficient 2024 Hadoop Advanced 2015 Haskell (Functional programming) Expert 2014 Hibernate Advanced 2016 IBM DB2 Advanced 2006 IntelliJ IDEA Proficient 2024 JDBC Proficient 2017 JFace, JFace Data Binding, Eclipse Data Binding Advanced 2008 JUnit Proficient 2024 Java EE, JEE, J2EE Advanced 2009 Java Emitter Templates (JET) Advanced 2005 Java Server Pages (JSP), Groovy Server Pages (GSP) Proficient 2016 Java, Java 8, Java 11, Java 17 Expert 2024 JavaScript Proficient 2024 Jekyll Advanced 2024 Jenkins CI (Continuous Integration) Advanced 2022 Jest Advanced 2024 Kotlin Expert 2024 Mac OS X Proficient 2024 Machine Learning, Data Mining Proficient 2020 MapReduce Proficient 2015 Maven Basic 2023 Meta Object Facility (MOF, EMOF) Advanced 2007 Microsoft Project Advanced 2007 Microsoft SQL Server Advanced 2003 Microsoft Visual Basic Advanced 2001 Microsoft Visual Studio Proficient 2015 Microsoft Visual Studio Code Advanced 2024 Microsoft Word, Excel, Powerpoint Proficient 2024 Mocha Basic 2016 MongoDB Advanced 2018 MySQL / MariaDB Proficient 2018 NeoJ Advanced 2016 NetBeans Proficient 2016 NoSQL Proficient 2024 Old programming languages: PL/I, Fortran, Cobol Advanced 1993 OpenGL Advanced 2017 OpenMP Proficient 2015 OpenOffice Proficient 2015 Oracle database, PL/SQL Proficient 2009 POSIX threads (pthreads) Proficient 2012 Parser generators: ANTLR, Yacc, Flex Proficient 2007 Perl Expert 2009 PostgreSQL Advanced 2024 PowerDesigner Proficient 2007 Prolog (Logic programming) Expert 1997 Python Advanced 2024 Qt Basic 2012 R Advanced 2015 REST, RESTful Proficient 2024 React Advanced 2020 Redux Advanced 2020 Ruby Advanced 2018 SBT Basic 2015 SQL Proficient 2022 Scala Proficient 2016 Shell scripting (Bash, Korn-Shell, Tcsh, Sed, Awk) Proficient 2024 Spock Basic 2016 Spring Boot, Spring Framework Advanced 2022 Standard Template Library (STL) Advanced 2016 Standard Widget Toolkit (SWT) Proficient 2008 Struts Advanced 2008 Sublime Advanced 2016 Subversion Expert 2012 Swing/AWT Advanced 2020 Terraform Advanced 2023 TestNG Proficient 2018 Turbo Pascal, Borland Pascal Proficient 1992 TypeScript Advanced 2024 UML Proficient 2024 UML2 Expert 2008 Unix: AIX, BSD, HP/UX, Linux, Sun Solaris Proficient 2024 Web 2.0/AJAX Frameworks (Prototype, Scriptaculous, etc.) Advanced 2015 Webpack Advanced 2020 Windows Proficient 2024 XML, XML Schema, DTD, XSLT Proficient 2024 Xcode Basic 2014 git Proficient 2024 iBATIS Proficient 2008 jQuery Advanced 2015 node.js Advanced 2024