Rolf Gardewischke - Developer & Designer

Hamburg, Germany

Experience

Jan 2019 - Aug 2025

6 years 8 months

Developer & Designer

Security authorities

Migration of a case processing system with numerous interfaces to other systems from Spring and Activiti to a Java JEE application
Further development into a cloud application
Consulting, development, requirements analysis, specification and design
Coordination with upstream and downstream systems
Data modeling, programming and implementation
Support with code reviews and ensuring clean code in the PL/SQL context
Documentation in Confluence
Troubleshooting PL/SQL applications including log analysis, session tracing and performance profiling
Optimization and tuning measures in the PL/SQL environment
Knowledge transfer and onboarding of new employees
Use of Jira for task management, progress tracking and sprint planning

Jul 2017 - Dec 2018

1 year 6 months

Developer & Designer

Otto GmbH & Co. KGaA

Expansion of receivables management and implementation of new business requirements
Approach to further development into a cloud application
Consulting, development, requirements analysis, specification and design
Coordination with upstream and downstream systems
Data modeling, programming and implementation
Testing the application with utPLSQL
Support with code reviews and ensuring clean code in the PL/SQL context
Documentation in MS Office
Troubleshooting PL/SQL applications including log analysis, session tracing and performance profiling
Optimization and tuning measures in the PL/SQL environment
Knowledge transfer and onboarding of new employees
Use of Jira for task management, progress tracking and sprint planning

Feb 2017 - Jun 2017

5 months

Developer & Designer

Otto GmbH & Co. KGaA

Expansion of supplier processing and implementation of new business requirements
Consulting, development, requirements analysis, specification and design
Coordination with upstream and downstream systems
Data modeling, programming and implementation
Testing the application with utPLSQL
Support with code reviews and ensuring clean code in the PL/SQL context
Documentation in MS Office
Troubleshooting PL/SQL applications including log analysis, session tracing and performance profiling
Optimization and tuning measures in the PL/SQL environment
Knowledge transfer and onboarding of new employees
Use of Jira for task management, progress tracking and sprint planning

Sep 2016 - Feb 2017

6 months

Developer

MMP Services

Creation of a configuration tool for direct marketing systems with Ruby on Rails
Consulting and development

Sep 2016 - Jan 2017

5 months

Developer & Designer

Deutsche Post Brief

Oracle DB migration and extension of interfaces from Oracle 11 to Oracle 12
Consulting, development and coaching of internal developers
Adoption and adjustment of the existing database schema with Oracle Data Pump
Adjustment and extension of PL/SQL packages
Data migration with Oracle Data Pump
Creation of unit tests with Java/Spring

Jul 2013 - Aug 2016

3 years 2 months

Developer & Designer

Otto GmbH & Co. KGaA

New development of a backend system for processing customer orders in multichannel retail
Consulting and development
Setup of a test environment
Coaching of internal developers

Jul 2012 - Jun 2013

1 year

Developer & Designer

Bombardier

Maintenance of a train scheduling system
Consulting and development
Coaching of internal developers

Jun 2011 - Feb 2012

9 months

Developer & Designer

Deutschepost Brief

Migration of the Deutschepost Brief track-and-trace system hardware and software
Consulting and development
Setup of a VM for the development team
Adoption and customization of the existing database schema with Oracle Data Pump
Data migration with Oracle Data Pump
Takeover of a document archive
Support for performance measurements
Adjustment of existing Maven builds
Conversion of System V packages to RPM
Adjustment of scripts, C++ interface programs, and JUnit tests
Creation of load test scenarios with JMeter
Creation of system documentation
Migration of a document archive

Nov 2003 - May 2011

7 years 7 months

Developer & Designer

Deutschepost Brief

Extension of the Deutschepost Brief track-and-trace system by adding and expanding various interfaces and components
Setup of a VM for the development team
Adoption and customization of the existing database schema with Oracle Data Pump
Data migration with Oracle Data Pump
Support for performance measurements
Adjustment of existing Maven builds
Conversion of System V packages to RPM
Adjustment of scripts, C++ interface programs, and JUnit tests
Creation of load test scenarios with JMeter

Dec 2002 - Oct 2003

11 months

Developer & Designer

Deutschepost Brief

Further development of the Track-and-Trace system for Deutschepost Brief
Migration of an existing document archive from Reliant UNIX to Solaris
Expansion of various interfaces
Adjustment of C++ backend processes
Consulting and development
Coaching of internal developers

Jul 2001 - Nov 2002

1 year 5 months

Developer & Designer

Deutschepost Brief

Migration of Track and Trace Brief from Reliant Unix to Sun Solaris
Consulting and development

Jun 1999 - Jun 2001

2 years 1 month

Developer & Designer

Deutschepost Brief

Further development of Track and Trace Brief with migration from Reliant Unix to Sun Solaris
Creation of data transfer scripts
Optimization and performance measurements on an HV system
Development of C/C++ programs for data conversion
Package creation on Unix systems
Creation of PL/SQL procedures for statistical data analysis
Development of import functions into an Oracle database
Extension of C++ processes to control a document archive
Extension of a Java application program
Creation of interface designs
Consulting and development

Jul 1998 - Apr 1999

10 months

Development and Design

Dräger

Calibration of a CO2 sensor: determining limit and characteristic values from raw data for protocol creation
Consulting and development

Sep 1994 - Apr 1999

4 years 8 months

Development and Design

AFS

Object-oriented programming of a system to support refueling service at multiple airports
Consulting and development

Jan 1994 - Aug 2025

31 years 8 months

Freelancer

Apr 1993 - Jul 2001

8 years 4 months

Development and Design

EFT Gummiwaren

Development of an order management system in Clipper to manage customer and item master data, order entry, invoicing, dunning procedures, and statistical reporting
Consulting and development

Apr 1993 - Sep 1994

1 year 6 months

Independent Development and Design

Bendig Inkasso

Development of a system in Clipper to manage debtors and debt cases
Consulting and development

Aug 1992 - Feb 1993

7 months

Development and Design

Siemens AG

Development of an order processing system in a testing and diagnostics center using Informix with 4GL
Consulting and development

Summary

Focus areas

Oracle databases (up to version 19c) – development and design of PL/SQL solutions and database models
Performance optimization and tuning of Oracle databases
Java development – backend-oriented with a focus on maintainable and scalable high-performance applications

Industries