Arien Kock, Software Developer in Den Haag, Netherlands
Arien Kock

Software Developer in Den Haag, Netherlands

Member since January 22, 2016
A true full-stack developer, Arien works on server infrastructure, deployments, and configuration management. He takes initiative in architectural decisions, and he believes strongly in testing and QA. He likes talking to non-technical people and tries to bridge the knowledge gap going both ways. He champions the Agile manifesto. Arien thinks software can be beautiful and elegant, and he wants to meet more like-minded people.
Arien is now available for hire


  • Elsevier
    Dropwizard, AWS, Elasticsearch, Java8, jQuery
  • Symbaloo BV
    Java, Tomcat, Jetty, Spring, Spring Data, Flyway, MySQL, Jenkins, Docker...
  • ABN Amro
    Java EE, Tridion CMS, IBM Websphere, plain JDBC



Den Haag, Netherlands



Preferred Environment

Linux, Windows, Docker, IntelliJ, Git, AWS

The most amazing...

...solution I've built was a fully containerized CI pipeline with reproducible end-to-end tests and code quality reporting.


  • Java Expert

    2016 - 2016
    • Built an SSO integrated web-application using Dropwizard.
    • Created an API for the UI as well as for public use.
    • Tied it all together with Jenkins-driven automation.
    • Set up infrastructure provisioning and deployment using Cloudformation and Codedeploy (AWS).
    • Provided unit and browser testing ( for automatic promotion of code builds.
    Technologies: Dropwizard, AWS, Elasticsearch, Java8, jQuery
  • Lead Java Developer and De Facto Software Architect

    2013 - 2016
    Symbaloo BV
    • Developed and maintained a web application serving ~17k concurrent users and 22k requests per minute and still growing.
    • Led a team of 4 Java developers and coordinated back-end development tasks.
    • Introduced distributed transactions, a unified project build, automated deployments, and integration testing.
    • Constantly juggled maintenance, improvements, and an endless stream of new functionality.
    • Set up a new project with all the new toys (React, Redux, web sockets).
    Technologies: Java, Tomcat, Jetty, Spring, Spring Data, Flyway, MySQL, Jenkins, Docker, Amazon EC2
  • Senior Java Developer

    2012 - 2013
    ABN Amro
    • Worked on the back-end of the system feeding the Tridion CMS.
    • Gained a lot of experience with Scrum.
    • Worked in a fast dynamic team.
    Technologies: Java EE, Tridion CMS, IBM Websphere, plain JDBC
  • Java Web Developer

    2008 - 2013
    Sonepar Nederland Information Services BV
    • Learned the trade of Servlets, JSP, and Lucene in my first job.
    • Used String.intern() to fit the whole product database in memory for huge performance gains.
    • Gained knowledge about writing good SQL queries and stored procedures.
    • Worked on a Swing desktop application deployed using Java Web Start.
    Technologies: Java
  • Java Web Developer

    2011 - 2012
    Benelux Office for Intellectual Property
    • Upgraded numerous legacy web applications.
    • Developed internal tools for processing submissions from the Dutch Caribbean.
    • Built an end-user search engine for registered designs, which is still in use today.
    • Worked closely together with end-users.
    • Fulfilled a highly independent role.
    Technologies: Java, IBM Websphere, Portlets, Spring Framework, MyBatis


  • Benelux Design Register (Development)

    Built the web layer of this search engine. Pixel perfect design implementation. MySQL as a search engine.


  • Languages

    Java, SQL, JavaScript, Clojure, Go, AspectJ
  • Frameworks

    JPA, Spring Security, Hibernate, Spring MVC, Spring, Mithril, OAuth 2, Quasar, JMH
  • Tools

    Maven, Jenkins, Ansible, Apache Solr, Flyway, Gulp.js, Webpack, Apache Tomcat, RabbitMQ, Subversion (SVN), Git, Cucumber, Jetty, Phabricator, JGiven
  • Storage

    Spring Data, MySQL, Elasticsearch
  • Paradigms

    Functional Programming, Concurrent Programming, Object-oriented Programming (OOP), Scrum
  • Platforms

    AWS EC2, Linux, Docker
  • Libraries/APIs

    PhantomJS, Node.js, Comsat, Facebook API
  • Other

    WebSockets, OAuth, System Administration, SSH


  • M.Sc. degree in Computer Science
    2000 - 2007
    University of Twente - Enschede, The Netherlands

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