Olaf Mertens

Berlin, Germany · mail@olaf-mertens.com

Java backend developer

I have been an enthusiastic software developer for decades. My favourite topics are Java and Linux. I also deal intensively with Cloud Computing for a few years now.

I work as a freelance consultant in various projects. Formerly in Frankfurt am Main, today in Berlin.

If you are interested in a cooperation, please contact me at mail@olaf-mertens.com.

Current availability

I am available for new projects. Either in Berlin or remote.

CV Download

Projects

Backend/Cloud Development

GE Jenbacher / INNIO - Software Developer

Backend development of the myPlant portal.

myPlant collects and processes sensor data from gas engines and other machines in the cloud.

January 2018 - June 2020

Website of the publishing house Springer Nature

Springer Nature - Software Developer

  • Architecture and development of a central JSON-based database for user profiles
  • Maintenance and further development of the content management system
June 2016 - December 2017

Document Processing

Elsevier - Software Developer

Development of a pipeline for automatic analysis of magazine articles.

December 2015 - March 2016

Backend Programming

AUTO1 Group - Software Developer

Development of microservices for the backend of a large web application.

August 2015 - October 2015

Kindergarten administration application

Kindertagesstätte - Software Developer

Development of a desktop application for the administration of a kindergarten.

September 2013 - April 2014

Android App

Tattva Time - Software Developer

Android app to display the Tattva states from the yoga philosophy.

This requires the exact times of sunrise, which are calculated from the current location.

May 2013 - June 2013

Client-Server Application

Rohde & Schwarz - Software Developer

Maintenance and further development of a client-server application for the administration of digital certificates.

August 2011 - July 2015

Online vocabulary trainer

Own project - Software Developer

Online vocabulary trainer Papagei-Trainer with Facebook integration.

September 2010 - December 2012

Replacement of legacy credit management applications with Java web application

Landwirtschaftliche Rentenbank - Software Developer

  • Development of a web application for credit management
  • Setup of the test and deployment infrastructure for Java/Websphere development
May 2006 - June 2011

Project Manager Java/Web-Engineering

Allianz Dresdner Informationssysteme GmbH - Projektleiter

Organizational management and technical implementation of the migration of a business-critical Java web application to a new system environment.

September 2005 - March 2006

Web application for complex data reconciliation

Fireos GmbH (Startup) - Software Developer

Development of a web application for complex data reconciliation in the financial sector. I was the software architect and main programmer of the application.

September 2003 - December 2005

Administration of a stock exchange information system

Dresdner Bank - Unix Administrator, Software Developer

Reception and processing of information relevant to the stock exchange (e.g. Reuters news, etc.) and its presentation in the Intranet and Internet of the Bank.

Besides the operation and monitoring of web and Java application servers, I developed various applications for operational monitoring:

  • XML-based documentation system for the department
  • Web server monitoring tool
  • Content management system for the department’s homepage
May 2001 - May 2003

Web-based network management system

CDC Control Data GmbH - Software Developer

Development of a web-based network management system for Deutsche Telekom AG.

September 1998 - April 2001

Graphical Design Tool for „Timed Message Sequence Charts“

GMD Fokus - Diploma thesis

Development of a desktop application for easy graphical creation of Message Sequence Charts (MSCs) and automatic conversion of the graphics into a standardized text form. MSCs are graphics to represent the message exchange between processes.

The application was part of my diploma thesis.

March 1996 - July 1997

Teletext

Softlab GmbH - Software Developer

Analysis and further processing of teletext data.

February 1996 - April 1996

Printer Programming

IBM - Software Developer (trainee)

Development of a program for the control of laser printers of Berlin Police Operations Center.

February 1994 - July 1995

Education

Technische Universität Berlin

Diplom Ingenieur Electrical Engineering

Specialization in information transmission and networks

October 1990 - April 1997

Contact

Olaf Mertens
Margaretenstr. 29
16552 Schildow
Germany

Email: mail@olaf-mertens.com
Phone: +49 173 6644304

VAT Reg No: DE215947851

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