Driven and eager middleware professional with a fair touch of geekyness.

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  • Joris Visscher
  • Utrecht, the Netherlands
  • 61794295
  • NL100171837B02


  • Middleware Engineer2016 - present


    Middleware Engineer, Streaming data with Apache Kafka

  • Oracle Middleware consultant2015 - 2016


    EAI Consultant, Oracle Weblogic maintenance, Oracle Service Bus developer, SAP PI maintenance, Continuous integration, Continuous Delivery, Red Hat maintenance.

  • Oracle Middleware developer2014 - 2015

    Vattenfall Energy Trading

    EAI Consultant, Oracle SOA Suite / Service Bus developer

  • Integration consultant2013 - 2014


    EAI Consultant, Oracle SOA Suite / Service Bus / BPM developer
    Energy company
    Worked in several multidisciplinary teams in waterfall and scrum. Responsibilities were very diverse: requirements gathering, giving quick estimates on build hours, creating precise work scoping, functional design, technical design, monitoring projects progress, informing management and stakeholders, plan and coordinate a team of four middleware and Java developers.
    Techniques were Oracle Service Bus / Oracle BPM / Java development

    International Cable operator
    Worked in an cross country scrum team which connected 20 CRM systems across Europe, Middle East and Northern America through Oracle SOA Suite and Oracle Service Bus.
    Responsibilities were: Building SOA Suite and Service Bus projects to specification, challenge specifications and requirements, problem solving, Acceptance (UAT) support, Production support, building custom adapters for back-end systems.

    Also helped in several task forces for problem solving as well as performance tuning of Oracle middleware and Weblogic server running on Linux.

  • Analyst programmer2012 - 2013


    Middleware consultant, Service Bus developer, data analysis
    Retail sector (based in Milan, Italy)
    Served as middleware developer on integration project for 8 different back-end CRM and Order Management systems over four continents and a Hybris front end running several localized websites for the same retail supplier.
    Services were realized through Oracle Service Bus between several CRM systems and the Hybris E-Commerce platform.

    Grid company
    Writing functional and technical designs for a Geo Information System based on Oracle SQL, PL/SQL and spatial functions, next to that through optimizing SQL queries I realized several real time management HTML reports which used to take two hours query time and used to be made in Excel.

  • Application consultant2009 - 2012

    Nuon / Vattenfall

    Oracle Service Bus, BPM
    Worked as an integration developer on projects and helped on administration roles with the maintenance department.
    Among others, the projects were done with the following components: SAP, Siebel, Peoplesoft, exposing Oracle Database via internet, multiple Oracle BPM and Service Bus development projects
    Bamboo continuous integration with ANT scripts and the Weblogic Scripting Tool (WLST)

  • Web developer, owner2004 - 2009


    R15 was my own company which developed websites based on JavaScript, PHP, MySQL and Apache which mimicked desktop applications. Thus removing the need for expensive computers and licenses.
    I've created Intranet sites for order management, invoice management, work planning, optimizing work schedules and resource management.
    Next to that I created a Content Management System (CMS) which was sold to several local businesses.

  • Oracle ESB Developer2007


    Ordina offered an Oracle Enterprise Service Bus internship with the possibility to write our thesis on the subject of Service Oriented Architecture to conclude my studies at the Hanzehogeschool Groningen.
    We used Oracle Enterprise Service Bus to connect three Oracle database servers during the internship.
    After the internship was concluded we were offered a job as SOA developers which I took during the summer months.

  • Linux Systems Administrator2006 - 2007

    Mountains of the Moon University, Uganda

    The Mountains of the Moon University in Fort Portal, Uganda offered an internship where I created an internet cafe based on open source software and running on Linux computers.
    - Sysadmin for Ubuntu Linux servers, proxy / file server / antivirus / email
    - Program a low maintenance solution for the internet cafe
    - Teaching GNU/Linux basics to a class of Information Technology students

  • System and Network Administrator2002 - 2003

    Wezo NV

    At Wezo NV I served as an administrator on Microsoft Windows and Digital Unix. Daily duties were monitoring the IT landscape and serving as back-up for the application focal points.
    Upgrade of MS Exchange Server
    Upgrade of MS Windows Servers on all locations
    Simplifying and creating a more robust IT landscape
    - Microsoft and Unix Server / Workstation system administration on three locations
    - Network administration on three locations
    - Maintenance on MS File Server, MS Exchange administrator, Distributed File System

  • Junior System Engineer2001 - 2002

    AAC Cosmos

    AAC Cosmos delivered a package solution including several workstations and a Windows server for internet cafés. These packages took about one week to install completely, I've streamlined these package installs to take 4 hours and automating almost every task.
    The tools used were multicast imaging software, advanced Windows scripting and making use of the custom administration options when installing windows.
    Next to that I gave support for field engineers who placed these packages throughout the Netherlands.

Certification and courses

  • Principles of Project managementNovember 2014


  • Web Application ArchitecturesAug 2014

    University of New Mexico

    Development of web application architectures from an engineering perspective

  • Java Programming Fundamentals2010

    Twice IT

  • Werken met Requirements2011


  • BEA Aqualogic Service Bus 3: Design & Integrate Services2009


  • BEA WebLogic Server 9/10: System Administration2009


  • Microsoft Certified Professional - Installing, Configuring, and Administering Windows Professional2002


  • Microsoft Certified Professional - Installing, Configuring, and Administering Windows Server2001



  • Business Administration & Information technology2007

    Hanzehogeschool Groningen

  • Business Administration(No diploma)

    Rijksuniversiteit Groningen

Middleware related

  • Oracle Service Bus

  • Oracle BPM

  • Oracle SOA Suite

  • XCDL

  • XML

  • WSDL

  • XSD

  • Xquery

  • Xpath

  • XSLT

  • JMS

  • SOAP

  • HTTP

  • BPEL

  • WS-Security

  • REST

Operating systems

  • Windows

  • Linux

  • Ubuntu

  • Red Hat

  • Fedora

  • CentOS

  • Oracle Linux

  • UNIX

  • Mac OS X


  • SQL

  • PL/SQL

  • Java

  • UNIX specific development

  • Bash scripting

  • Ruby

  • Ruby on Rails

  • Python

Middleware administration

  • Oracle Service Bus

  • Oracle BPM

  • Oracle Weblogic

  • Oracle SOA Suite

  • Linux administration

  • Problem solving

  • Performance tuning

Web technologies

  • HTML5

  • CSS

  • PHP

  • jQuery

  • SQL

  • JavaScript

  • REST

Download resume as PDF format
Some of the techniques I work with:

My motto

  • Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
  • ~Antoine de Saint-Exupery

Contact info