Dirk Kirsten, Software Developer in Konstanz, Baden-Württemberg, Germany
Dirk Kirsten

Software Developer in Konstanz, Baden-Württemberg, Germany

Member since September 23, 2013
Dirk engineers data-driven applications with a proven ability to develop efficient and scalable solutions on time and within budget. He has extensive experience and interest in building applications using modern web technologies and is interested mainly in building everything from front-to-back.
Dirk is now available for hire

Portfolio

Experience

Location

Konstanz, Baden-Württemberg, Germany

Availability

Part-time

Preferred Environment

Git, IntelliJ IDEA, Linux, Vue, Java, JavaScript, TypeScript, Flutter, Dart, BaseX

The most amazing...

...thing I've implemented is a matrix factorization algorithm for recommender systems with a low RMSE.

Employment

  • Senior Software Engineer

    2020 - PRESENT
    FORCAM GmbH
    • Developed solutions around a leading IIoT (Industrial Internet of Things) platform.
    • Specialized in cloud infrastructure and helped in delivering an outstanding cloud experience for our customers.
    • Delivered full-stack applications using Spring, Hibernate, Vaadin, and modern testing technologies.
    • Deployed applications using Docker, Kubernetes, and Helm.
    Technologies: Java, Spring, Hibernate, Vaadin, Vue, JavaScript, REST
  • Senior Developer

    2017 - 2019
    Senacor Technologies
    • Developed solutions for our customers, usually sizeable German banking institutions.
    • Architected and developed solutions on the client and server-side, including full-stack, using Spring, Hibernate, JavaFX, and GWT.
    • Supported and assisted the customer in realizing their needs and building architectures fitting their requirements.
    Technologies: Java, REST, GWT, Spring, Hibernate, SQL
  • Software Engineer

    2012 - 2017
    BaseX GmbH
    • Led full-stack development tasks for a SPA with AngularJS. Responsible for all client-side code, unit tests, and end-to-end tests.
    • Planned, architected, and implemented an application and reviewing platform using OData, XForms, BetterForms, RESTXQ, and XQuery.
    • Developed a plugin for TinyMCE to support image addition from a third-party application using JavaScript.
    • Planned and implemented a code-sharing solution for XML and XQuery using AngularJS, RESTXQ, and XQuery.
    • Created an AngularJS application for a nomination and application process.
    Technologies: JavaScript, XML, RESTXQ, SOAP, XQuery
  • Research and Teaching Assistant

    2010 - 2012
    University of Konstanz
    • Assisted in the "Introduction to Computer Systems" course.
    • Set up a mobile ad-hoc network using a universal software radio peripheral (USRP).
    • Created back-end support and administration scripts for test setups of mobile networks.
    • Conducted security research on the cryptography of GSM.
    • Conducted initial research, configuration, and set up of a web archiving solution using the Wayback Machine.
    Technologies: Shell Scripting, JavaScript, Python
  • Software Engineer

    2007 - 2010
    IBM
    • Developed e-learning modules for Lotus Notes using JavaScript.
    • Implemented web 2.0 style banking solution prototypes using ICEfaces, Java, Servlets, and Spring.
    • Exploited distributed RAM for parallel joins on MapReduce using Hadoop.
    • Implemented HiperSockets as a data link layer for the Reliable Datagram Socket (RDS) protocol as a Linux kernel module for System Z.
    • Worked on network performance measurement between virtual machines on System Z for various datagram and streaming protocols using Linux on System Z.
    Technologies: Java, JavaScript, Vim Text Editor, Linux

Experience

  • Rights Management Tool

    I planned and developed a rights management solution for a large publishing house to reduce costs for acquiring reproduction rights and managing licenses. It is a complex single-page application built on AngularJS.

  • BaseX
    http://basex.org

    BaseX is an XML database and XQuery 3.0 processor implemented in Java.

    Acted as a core developer and performed testing and bug fixing for the BaseX core product. I developed a replicated and distributed version of BaseX for improved performance and fault tolerance. I also added modular functionality, like a random module or a templating system based on Mustache.

  • Lindau Nobel Laureate Meetings
    http://www.lindau-nobel.org/

    I architected and implemented a solution called NAPERS for the application and reviewing process of young researchers for the Lindau Nobel Laureate Meetings.

    It uses external data storage, which we connect to using OData. The platform itself is programmed in XQuery using RestXQ; the client-side is done using AngularJS (JavaScript). I did the implementation, testing (JUnit, Selenium), and architecture of the system.

  • OpenAtrium

    This project is an internal communication platform, including a wiki, shoutboxes, forum, polls, task management, and calendar, based on OpenAtrium (PHP5, MySQL, LAMP). It is implemented for a German non-profit-organization called Studieren Ohne Grenzen (studying without borders). I set up and enhanced the platform and migrated content from an older legacy solution. I also improved the login functionality to work with proprietary pre-existing user profiles.

Skills

  • Languages

    JavaScript, XPath, XQuery, SQL, XML, Java, TypeScript, Dart, C++, C, Python, PHP
  • Frameworks

    AngularJS, Spring, Hibernate, Vaadin, Flutter, Express.js, GWT
  • Libraries/APIs

    RESTXQ, Vue, Node.js, jQuery
  • Paradigms

    Functional Programming, Scrum, Concurrent Programming, REST
  • Storage

    BaseX, MongoDB, MariaDB, IBM Db2, CouchDB
  • Tools

    IntelliJ, Vim Text Editor, IntelliJ IDEA, WebStorm, Git, Mongoose
  • Platforms

    Linux
  • Other

    Shell Scripting, SOAP

Education

  • Master's Degree in Information Engineering
    2010 - 2014
    University of Constance - Konstanz, Germany
  • Bachelor's Degree in Applied Computer Science
    2007 - 2010
    University of Cooperative Education Stuttgart - Stuttgart, Germany

Certifications

  • LPIC-1
    FEBRUARY 2010 - PRESENT
    Linux Professional Institute

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