Harmjan Willemsen

I'm a


photo of Harmjan Willemsen

IT Professional & Full-Stack Developer.

  • Name: Drs. H.J. (Harmjan) Willemsen MBA
  • City: Culemborg, The Netherlands
  • Email: Click here
  • Freelance: Parttime Available

I am a pragmatic, results-oriented IT professional with years of experience in designing, developing, testing and implementing information systems. I adapt easily to a new environment and can quickly add value. From my business economics and business administration background I have extensive knowledge of financial, logistical and administrative processes within organizations. Through my various assignments I have a lot of experience with ICT projects within information and knowledge-intensive organizations at the (central) government and at financial service providers.


Django, Django REST framework, FastAPI80%
HTML5, CSS3, Bootstrap80%
Javascript, JQuery, Ajax70%
SQL & Databases (SQLite, MySQL, PostgreSQL)70%
Git/GitHub, Visual Studio Code, Jira/Confluence, AWS80%
Old school: Cobol/Cics, JCL, Adabas/Natural, IDMS, DB2, 90%





Open University Business School (UK)

Business administration (master)


Open University (Netherlands)

Business economics (bachelor)


Avans Hogeschhol (Netherlands)

Bootcamp Full Stack Developer

December 2020 - Present


To educate myself as a developer in the modern development languages, I followed various 'specializations' of the University of Michigan via Coursera:

  • Web Design for Everybody: Basics of Web Development & Coding - This Specialization covers how to write syntactically correct HTML5 and CSS3, and how to create interactive web experiences with JavaScript.
  • Python 3 Programming - This specialization teaches the fundamentals of programming in Python 3.
  • Django for Everybody - This specialization introduced Python programmers to building web sites using the Django library. Across the four courses, students learned HTML, CSS, SQL, Django, JavaScript, jQuery and JSON web services.
  • Google IT Automation with Python - This professional certificate, developed by Google, is designed to provide IT professionals with in-demand skills like Python, Git, and IT automation.

Professional Experience

IT Professional

1995 - present

Various organizations

From the beginning of 1995 until now I have worked in ICT in various organizations as analyst, business consultant and project and information manager. In the first years I was employed by various organizations, from 2006 I am self-employed. Some examples of are:

  • Information Manager at Municipality of Amsterdam, DJI and Centraal Beheer Achmea
  • Business Consultant at Logius and UWV
  • Senior Advisor Information Management at NVWA
  • Senior Business Analist at Centraal Beheer Achmea
  • Program and Consulting manager at Oracle Netherlands
  • Senior Project Manager at Exact International
  • Program Manager Information Management at RIVM
  • Senior Manager at KPMG
  • Senior Consultant at MLC

Software developer

1988 - 1994

Various organizations

Worked as a (lead) developer for various organizations. Started as a systems analyst at bank Mees & Hope (MeesPierson) in combination with training courses from Volmac Top Trainings (CapGemini). During this period I was mainly involved in developing and maintaining information systems using Cobol/CICS and Adabas/Natural. Subsequently, as a developer at Itresco Consultants, I worked on the development of information systems in Cobol with DB2/IDMS as a database for, among others. Delta Lloyd (NN). Finally, as a developer at Pilot Software, I built information systems in 4-GL (fourth generation languages) for MSD, Heineken and Pakhoed (Vopak).


Some examples of programs I have created as part of the Coursera specializations


Web development






Automation with Python