Ernst de Haan

Current

Teamleider Java at bol.com
Chief Technical Officer at PensioenPage B.V.
Ports Committer at FreeBSD

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Past

Technical Architect at Orange Nederland Breedband B.V.
Team leader / Java solution architect at Wanadoo Nederland B.V.
R&D Developer at Jollem Information Technology

BroadVision developer at ConsumerDesk
Java R&D developer at Universiteit Utrecht
Delphi developer at FlexPay
IT Student Supporter at HTS Arnhem
Microsoft Access developer at HTS Arnhem

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5 more...

Education

Hogeschool van Arnhem en Nijmegen
Greijdanus, Zwolle

Recommended

3 people have recommended Ernst

Connections

173 connections

Industry

Information Technology and Services

Websites

Ernst de Haan’s Summary

Solution architect that combines technical knowledge (and the eagerness to extend this) with social skills and the drive to meet or even exceed customer's expectations. Experience includes ISP/Telco and Finance domains, in a fairly diverse technology field, including object-orientation, XML, UNIX, web services, relational databases, CRM, billing, rating, middleware, etc.

Ernst de Haan’s Specialties:

Designing solutions that are suitable, realizable and high-profile. Reaching consensus. Leading software developers. Coordinating technical activities. Gradually improving quality in all relevant areas.

Ernst de Haan’s Experience

Teamleider Java

bol.com

(Information Technology and Services industry)

2009 — Present (less than a year)
Chief Technical Officer

PensioenPage B.V.

(Financial Services industry)

December 2006 — Present (3 years )

Developing a brand as well as a web application from top (architecture, graphical design, functional requirements) to bottom (technical documentation, HTML, XSLT, Java). See https://www.pensioenpage.com/.
Ports Committer

FreeBSD

(Non-Profit; 201-500 employees; Computer Software industry)

November 2001 — Present (8 years 1 month)

Ports committer in the FreeBSD project, focusing on porting Java applications to this UNIX operating system. See http://www.freebsd.org/.
Technical Architect

Orange Nederland Breedband B.V.

(Telecommunications industry)

March 2004 — November 2006 (2 years 9 months)

Responsible for company-global architecture and guidelines. Develop the architecture vision for the company, reactively design the architecture for projects and pro-actively propose architectural improvements. Advise and initiate within the company, but also involved in alignment with external companies, including the mother company (France Telecom) and external partners.

Led the Architecture Group, a virtual team of architects. This group's responsiblity included reviewing and approving architecture

Represent the Development department within the Security Group, connecting architecture and security.

Until early 2006, I fulfilled this role part-time. As of April, it changed to a full-time role.

Note: In April 2006, the name of the company changed from "Wanadoo" to "Orange Breedband." The current name is now "Online Breedband", see http://www.online.nl/.
Team leader / Java solution architect

Wanadoo Nederland B.V.

(Public Company; Internet industry)

July 2001 — March 2006 (4 years 9 months)

Led a team of around 7 software developers. Resonsibilities of the team included the maintenance and development of front-end applications and of interfaces (APIs) connecting these front-end applications to back-end applications.

Unified programming languages from a mixture of Perl, PHP, JSP, servlets and ColdFusion to a more consistent approach with only Java servlets, XSLT and PHP.

Developed a framework for web services and front-end applications (XINS) and made it free and open-source. See http://www.xins.org/.

Worked together with other development teams, the operations department and project managers. Aimed to constantly improve the way of working, increasing productivity, operational manageability and fun.
R&D Developer

Jollem Information Technology

(Computer Software industry)

January 2000 — June 2001 (1 year 6 months)

Performed Java-oriented projects as a freelancer. This included an R&D project in the telecom-sector and the design and development of a dynamic website using J2EE (EJB, JSP, XSLT). Subcontracted people via the internet, from Moldova and Australia.

Jollem was my own company.
BroadVision developer

ConsumerDesk

(Internet industry)

April 1999 — December 1999 (9 months)

Design and implementation of a customer-facing website for a startup company, using BroadVision. UML design using Rational Rose. Implemented using a combination of server-side JavaScript and C++. Worked with Sun Solaris and Oracle.

The team was just small, consisting initially of 5 people for operations and development and 3 additional staff (management, content editing).
Java R&D developer

Universiteit Utrecht

(Educational Institution; Higher Education industry)

January 1998 — March 1999 (1 year 3 months)

Was involved in the development of a framework for educational applications for both companies and educational institutes. Responsibility included part of the design (UML) as well as part of the implementation (Java, XML).
Delphi developer

FlexPay

(Privately Held; 1-10 employees; Insurance industry)

June 1997 — December 1997 (7 months)

Developed a small financial application using Borland Delphi, in a team of 3 developers.

This was during my Computer Science study.
IT Student Supporter

HTS Arnhem

(Government Agency; 201-500 employees; Higher Education industry)

December 1996 — December 1997 (1 year 1 month)

Accompanied a number of Computer Science students with database-related subjects, including information analysis (FCO-IM), relational database design and implementation using Microsoft Access.
Microsoft Access developer

HTS Arnhem

(Government Agency; 201-500 employees; Higher Education industry)

November 1995 — February 1996 (4 months)

Helped implement a financial application for the school I was studying at. Responsibilities included data- and process-analysis, form design and implementation using Microsoft Access.

This was during my study Computer Science, at the same school.

Ernst de Haan’s Education

Hogeschool van Arnhem en Nijmegen

1999 , Computer Science , 1994 — 1999

Activities and Societies:

Performed several side-activities, including supporting (fellow) students in ANSI C, information analysis (FCO-IM) and relational database design and development.
Greijdanus, Zwolle

HAVO , 1987 — 1994

Additional Information

Ernst de Haan’s Websites:

Ernst de Haan’s Interests:

Software development methodologies, team leadership, system architecture, information analysis, object orientation, design patterns, Java (the programming language), XML, internet technologies (such as HTTP), open source technology, Linux, UNIX.