Stefan Wolff - Project team member

Q: Where is Stefan based?

Stefan is based in Essen, Germany .

Q: What languages does Stefan speak?

Stefan speaks the following languages: German (Native), English (Intermediate) .

Q: How many years of experience does Stefan have?

Stefan has at least 28 years of experience. During this time, Stefan has worked in at least 7 different roles and for 15 different companies . The average length of individual experience is 2 years and 8 months . Note that Stefan may not have shared all experience and actually has more experience.

Q: What is Stefan's latest experience?

Stefan's most recent position is Project team member at Environmental service provider .

Q: What companies has Stefan worked for in recent years?

In recent years, Stefan has worked for Environmental service provider , Strabag SE , Retail (discount store) , Retail (food) , and Freelance work .

Q: Which industries is Stefan most experienced in?

Stefan is most experienced in industries like Information Technology (IT) , Retail , and Food and Beverage . Stefan also has some experience in Energy , Professional Services , and Manufacturing .

Q: Which business areas is Stefan most experienced in?

Stefan is most experienced in business areas like Information Technology (IT) , Project Management , and Quality Assurance (QA) . Stefan also has some experience in Operations , Supply Chain Management , and Product Development .

Q: Which industries has Stefan worked in recently?

Stefan has recently worked in industries like Information Technology (IT) , Retail , and Food and Beverage .

Q: Which business areas has Stefan worked in recently?

Stefan has recently worked in business areas like Information Technology (IT) , Supply Chain Management , and Quality Assurance (QA) .

Recommended expert

Essen, Germany

Experience

Jul 2025 - Present

9 months

Project team member

Environmental service provider

Implementation and maintenance of an order management system
RDBMS Oracle 19c
Oracle Forms/Reports 12c/14c
Oracle SQL
XML processing

Jul 2023 - Aug 2024

1 year 2 months

Project team member

Strabag SE

Further development of a multilingual quality assurance system for 11 European locations based on Oracle Forms/Reports
RDBMS Oracle 19c
Oracle Developer 12c (Forms/Reports)

Dec 2021 - Present

4 years 4 months

Project team member

Retail (discount store)

Integration of a new warehouse management software from proLogistik into the existing ERP system
RDBMS Oracle 19c
Oracle Forms 12c
Oracle SQL
XML processing
Coaching and consulting in SQL and PL/SQL development

Mar 2015 - Dec 2024

9 years 10 months

Project team member

Retail (food)

Further development of the existing PPS system based on Oracle Forms/Reports with approx. 1000 tables and 2500 Forms/Reports modules
RDBMS Oracle 11g/19c
Oracle Developer 10g/12c (Forms/Reports)
Use of FormsApiMaster from ORCL Toolbox Ltd.
SOAP web service integration in Oracle 11g/19c
Integration of d.3ecm (d.velop AG), fTRACE GmbH, qualitype GmbH, JSON web service and vPOOL logistics GmbH
Analytical SQL functions, hierarchical queries and pivoting
XML processing
Development of programming guidelines in PL/SQL

Jan 2014 - Feb 2015

1 year 2 months

Project team member

Robert Bosch GmbH

Design and implementation of the Management of Cost and Resources module
RDBMS Oracle 11g
Oracle Developer 11g (Forms/Reports)
Oracle Application Server 11g

Jul 2009 - Dec 2013

4 years 6 months

Project team member

RWE Power AG

Migration of a production planning system from MS Excel to Oracle Forms
Data migration as part of a redesign of the lab management application
Oracle 10g/11g RDBMS
Oracle Developer 10g (Forms/Reports)
Use of the FormsApiMaster from ORCL Toolbox Ltd.
Oracle Application Server 10g

Feb 2009 - Jun 2009

5 months

Project team member

Lüsch Consulting GmbH

Migration and further development of a complex Oracle Forms application for a public client
Quality assurance of RDBMS and Oracle Forms/Reports
Modularization of the application
Oracle 10g RDBMS
Oracle Application Server 10g
Oracle Developer 10g (Forms/Reports)

Dec 2008 - Jan 2009

2 months

Project team member

Deutsche Card Services GmbH

Adjustment of the layout of web-based reports to the style guide of the new parent company
Oracle 10g RDBMS
mod_plsql
HTML and JavaScript

Apr 2008 - Nov 2008

8 months

Project team member

BASF IT Services

Integration of two warehouse management systems
Quality assurance of RDBMS and Oracle Forms/Reports
Creation of coding standards and modularization of the applications
Introduction of versioning and rollout management
Design of interfaces for a crop protection management information system
Oracle 10g RDBMS
Oracle Application Server 10g
Oracle Developer 10g

Jan 2008 - Apr 2008

4 months

Project team member

MGI METRO Group Information Technology GmbH

Maintenance of the existing catalog system application, especially the interfaces to external systems (e.g., Sinfos)
Oracle 9i RDBMS
Oracle Application Server 10g
Oracle Developer 10g

Apr 2007 - Dec 2007

9 months

Member of the project team

Itellium Systems & Services GmbH

Design and implementation of a projection method for Quelle
RDBMS Oracle 9i
Oracle Application Server 10g
Oracle Developer 10g
Oracle Virtual Private Database (VPD)

Jan 2007 - Present

19 years 3 months

IT Consultant

Freelance work

Member of numerous project teams as an external IT consultant
Focus areas: Oracle Forms/Reports, PL/SQL, XML processing, coaching and consulting

Jan 2007 - Apr 2007

4 months

Member of the project team

Itellium Systems & Services GmbH

Design and implementation of installment payment and address formatting modules for special shipping
RDBMS Oracle 10g
Oracle Application Server 10g
Oracle Developer 10g
Oracle Advanced Queuing (AQ)
Visual Rules by Innovations Softwaretechnologie GmbH

Jul 2002 - Dec 2006

4 years 6 months

Application Developer

EUROPIPE GmbH

Migration of a complex Oracle Forms/Reports/Graphics application (approx. 1500 tables, 2000 client modules) from the Developer 6i (Client/Server) development environment to Developer 9i/10g (Web)
Automated migration using the Oracle Forms C-API and the FormsApiMaster from ORCL Toolbox Ltd.
Conversion from character mode to real mode for mobile devices
Setup of a Developer 9i development environment on Sun Sparc Solaris 5.9
Training application developers and supporting the rollout in a 24/7 operation
Introduction of Oracle WEBUTIL and event-driven publishing
Replacing Oracle Graphics 6i with Oracle BI-Beans
Configuration of Oracle Application Server 10g and Oracle Developer Suite 10g
Changing the character set of the Oracle 9i database to UTF8
Responsibility for migration strategy, test coordination, and application adaptation
Design and implementation of automated deployments with minimal downtime
Implementation of user management for around 700 users and database-supported multilingualism
Bug fixing and further development of the application
Establishment of development standards and analysis of software innovations

Oct 1998 - Jul 2002

3 years 10 months

Project management / Subproject management

EUROPIPE GmbH

Migration of a complex Oracle Forms/Reports/Graphics application (approx. 1500 tables, 2000 client modules) from CDE (Forms 4.0, Reports 2.0, Graphics 2.0) to Developer 6i (Client/Server)
Support and maintenance of online archiving
Technical testing and coordination of functional tests for new Developer releases
Analysis scripts for quality assurance (Unix shell scripting – AWK/SED)
Contact person for end users and developers, including at the French branch
Communication with Oracle Support

May 1998 - Oct 1998

6 months

Project manager / sub-project manager

Aspect / conTakt AG

Design and implementation of data transfer in the management information system from various subsystems into an Oracle database using Oracle job routines
IT environment: Oracle RDBMS 7.3, MS SQL Server, MS Access 7.0

Mar 1998 - Jul 2002

4 years 5 months

Application developer

Opitz Consulting GmbH

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (28 years), Retail (11.5 years), Food and Beverage (10 years), Energy (4.5 years), Professional Services (4.5 years), and Manufacturing (4 years).

Information Technology

Retail

Food and Beverage

Energy

Professional Services

Manufacturing

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (28 years), Project Management (8.5 years), Quality Assurance (6 years), Supply Chain Management (4.5 years), Operations (4.5 years), and Product Development (1.5 years).

Information Technology

Project Management

Quality Assurance

Supply Chain Management

Operations

Product Development

Skills

It Know-how Profile (Selection)

Software Engineering Methods

Entity-relationship Modeling (Erm)

Tools

Oracle Forms 4.0, 4.5, 6i, 9i, 10g, 11g, 12c And 14c
Oracle Reports 2.0, 2.5, 6i, 9i, 10g, 11g, 12c And 14c
Oracle Graphics 6i / Oracle Bi-beans
Oracle Discoverer
Oracle Browser, Query Builder
Oracle Case 5.1.8 To Oracle Designer 9i/10gr2
Oracle Application Express (Html-db)
Oracle Application Server 10g
Oracle Sql Developer
Quest: Toad For Oracle
Orcl Toolbox Ltd.: Formsapimaster
Serena: Pvcs Version Manager / Dimensions
Tortoisesvn
Atlassian Jira/confluence
Soapui 5.6.0 / Postman

WEB

Html
Javascript

Programming Languages

Oracle Pl/sql
Unix Shell Scripting (Especially Awk, Sed)
C
Pro*c 8.1.6

Databases

Oracle Rdbms 7, 8i, 9i, 10g, 11g, 12c And 19c

Operating Systems

Sun Sparc Solaris Versions 5.8 And 5.9

Languages

German

Native

English

Intermediate

Education

Oct 1991 - Mar 1998

University of Dortmund

Diploma in Business Mathematics · Business mathematics · Dortmund, Germany · Good

Oct 1981 - Jun 1990

Theodor Heuss Gymnasium

Essen, Germany

Oct 1977 - Jun 1981

Adolf Clarenbach Primary School

Heiligenhaus, Germany

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Stefan based?

Stefan is based in Essen, Germany.

What languages does Stefan speak?

Stefan speaks the following languages: German (Native), English (Intermediate).

How many years of experience does Stefan have?

Stefan has at least 28 years of experience. During this time, Stefan has worked in at least 7 different roles and for 15 different companies. The average length of individual experience is 2 years and 8 months. Note that Stefan may not have shared all experience and actually has more experience.

What roles would Stefan be best suited for?

Based on recent experience, Stefan would be well-suited for roles such as: Project team member, Member of the project team, IT Consultant.

What is Stefan's latest experience?

Stefan's most recent position is Project team member at Environmental service provider.

What companies has Stefan worked for in recent years?

In recent years, Stefan has worked for Environmental service provider, Strabag SE, Retail (discount store), Retail (food), and Freelance work.

Which industries is Stefan most experienced in?

Stefan is most experienced in industries like Information Technology (IT), Retail, and Food and Beverage. Stefan also has some experience in Energy, Professional Services, and Manufacturing.

Which business areas is Stefan most experienced in?

Stefan is most experienced in business areas like Information Technology (IT), Project Management, and Quality Assurance (QA). Stefan also has some experience in Operations, Supply Chain Management, and Product Development.

Which industries has Stefan worked in recently?

Stefan has recently worked in industries like Information Technology (IT), Retail, and Food and Beverage.

Which business areas has Stefan worked in recently?

Stefan has recently worked in business areas like Information Technology (IT), Supply Chain Management, and Quality Assurance (QA).

What is Stefan's education?

Stefan holds a Master in Business mathematics from University of Dortmund.

What is the availability of Stefan?

Stefan is immediately available for suitable projects.

What is the rate of Stefan?

Stefan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.