Willi R.-Delphi and Object Pascal Developer
Check rate
Experience
Gas sensor technology and conversion of device data
Gas sensor technology and conversion of device data
Developed two applications to convert configuration data between different versions of gas sensor devices. Existing data is read and made available for the new device version after conversion. Used, among other things, for device upgrades.
Technology: Delphi 12 Athens.
Delphi applications for managing and controlling alarm and test systems
Delphi applications for managing and controlling alarm and test systems, as well as test devices for the food industry.
Technology: Delphi 10.3.
Mechanical engineering, Thuringia
Software for managing and controlling micro-assembly, micro- and nano-dosing, and micro laser soldering, closely integrated with machinery.
Delphi XE5 and 10.3.
Applications closely integrated with woodworking machinery
Applications closely integrated with woodworking machinery
Developed and extended Delphi applications for managing and controlling woodworking machinery in PLC and CNC environments. Created software tools, interfaces, and data conversions; integrated third-party software, printers, and scanners. Expanded operations from standalone workstations to terminal server use and supported customers in Germany, the Netherlands, and Italy.
Technologies: Delphi 7 and 2010, Paradox, MySQL, Excel, ReportBuilder, Nevronna Rave Report, and Inno Setup.
Further development of a large window design application
Further development of a large window design application
Worked for several years on a large application for window construction and design. Further developed an established Pascal/Delphi codebase using different technologies for programming, user interface, and data storage. The application’s foundations were already about 30 years old during the project.
Technologies: Delphi 7 and 2010, Combit, FastReport, XML, and Excel.
Machine-level applications for woodworking equipment
Machine-level applications for woodworking equipment
Development and enhancement of Delphi applications for managing and controlling woodworking equipment in PLC and CNC environments. Creation of software tools, interfaces, and data conversions; integration of third-party software, printers, and scanners. Expansion from single-workstation to terminal server operation and support for customers in Germany, the Netherlands, and Italy.
Technologies: Delphi 7 and 2010, Paradox, MySQL, Excel, ReportBuilder, Nevronna Rave Report, and Inno Setup.
Automotive accessories, Stuttgart
Redesign and development of planning and controlling tools. Migration from Delphi 7 to Delphi 2010; reporting with SSRS and Visual Studio, Microsoft SQL Server, and stored procedures.
Textile retail company, Münster
Maintenance and further development of an undocumented Delphi store checkout solution. Interfaces and migration in the inventory management environment; support.
Delphi, Excel, Access, VBA, and Clipper.
IT service provider and wholesaler, Düsseldorf
Installation and distribution management, as well as MPOS rollout in international METRO-/MAKRO environments. Troubleshooting and monitoring.
TIVOLI, PXE, HP ILO, Microsoft SQL Server, Windows scripting, and C#.
Online and offline tools for own online retail business
Online and offline tools for own online retail business, especially data preparation from various sources.
Delphi, XML, VB, Excel, and web technologies.
Wholesale, Düsseldorf
Rollout of cash register controllers and payment terminals; troubleshooting, monitoring, and pilot phase support.
Delphi, Excel, and scripting.
Machine-level applications for woodworking equipment
Machine-level applications for woodworking equipment
Developed and expanded Delphi applications for managing and controlling woodworking equipment in PLC and CNC environments. Created software tools, interfaces, and data conversions; integrated third-party software, printers, and scanners. Expanded systems from standalone workstations to terminal server operation and supported customers in Germany, the Netherlands, and Italy.
Technologies: Delphi 7 and 2010, Paradox, MySQL, Excel, ReportBuilder, Nevronna Rave Report, and Inno Setup.
Cable television, Frankfurt
Order management, GUI, and reports; English as the project language.
Delphi 2005, Oracle 10G, PL/SQL, and Nevrona Rave Report.
Windows point-of-sale system for snack bars
Windows point-of-sale system for snack bars with reporting, inventory management, time tracking, and peripheral device integration.
Delphi 6, Paradox, and MySQL.
Testing equipment, Homburg
Processed measurement data and automated Excel from Delphi; created standalone Excel outputs with additional calculations.
Delphi 6, Excel, and VBA.
Point-of-sale systems and vending machines
Developed point-of-sale software for catering and cafeterias for a provider of cashless payment systems, including an inventory management interface, and contributed to card top-up and vending machines, including hardware design.
Delphi 5/6, Paradox, MySQL and embedded VB.
IT Manager and Assistant to Management
Short-term position as IT Manager and Assistant to Management at a textile retail chain.
Financial services and textile industry
Fund administration in a large-scale project using Delphi 5/6, Microsoft SQL Server, InterBase and Oracle. Order costing and maintenance of Delphi and C++ applications for controlling and time management.
Tour operator
Expanded the company's tour operator application after its sale. Integrated financial accounting, the Sabre booking system and Tobit Faxware, and managed the company's IT.
Clipper and dBase.
Proprietary industry software
Planned, developed and sold inventory management and industry-specific solutions for wholesale and retail, tourism, local public transport, air freight forwarding, steel construction and technical services. Areas included inventory management, order processing, accounting and DATEV interfaces, and multilingual applications.
Clipper and dBase.
Software companies and own development
Program and data migration from MAI systems to Unix/SCO XENIX using MAI/Basic IV and bbx IV. Development of software for medical practices and tax consultants, as well as my own income tax calculation program in C under Unix or DOS.
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Retail, Construction, Information Technology, Tourism, Professional Services, and Transportation.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Sales, Finance, Investments and M&A, and Logistics.
Summary
I would like to develop software myself and move existing Delphi applications forward. I am especially interested in maintenance and further development, databases, interfaces, and data conversion.
A management position is not a requirement for an interesting collaboration. I am happy to take on technical responsibility when it fits the task. We can agree on responsibilities and coordination at the start. I am looking for a collaboration that could also continue over the long term.
Skills
- Delphi: Since 1998 · Delphi 3 To 12 Athens · Object Pascal · Vcl · Oop
- Databases: Microsoft Sql Server, Mysql, Interbase, Oracle, Sqlite, Access, Paradox, Dbase
- Development: Existing Codebases, Version Migration, Interfaces, Data Conversion, And Peripheral Device Integration
- Reporting: Ssrs, Fastreport, Reportbuilder, List & Label, Nevrona Rave Report
It Experience Since 1983, Self-Employed Since 1984. Project Experience Includes Mechanical Engineering, Gas Sensor Technology, The Polymer Industry, Retail, And Tourism.
Languages
Education
FH Dortmund
General Computer Science
Statistics
Experience
Global experience
Expertise
Frequently asked questions
Have questions? Find more information here.
Willi is based in Schöppingen, Germany.
Willi speaks the following languages: German (Native), English (Advanced), Italian (Intermediate), Spanish (Elementary), French (Elementary), Indonesian (Elementary).
Willi has at least 43 years of experience. During this time, Willi has worked in at least 20 different roles. The average length of individual experience is 2 years. Note that Willi may not have shared all experience and actually has more experience.
Based on recent experience, Willi would be well-suited for roles such as: Gas sensor technology and conversion of device data, Delphi applications for managing and controlling alarm and test systems, Mechanical engineering, Thuringia.
Willi's most recent position is Gas sensor technology and conversion of device data.
Willi is most experienced in industries like Retail, Construction, and Information Technology. Willi also has some experience in Tourism, Professional Services, and Transportation.
Willi is most experienced in business areas like Information Technology, Product Development, and Sales. Willi also has some experience in Finance, Investments and M&A, and Logistics.
Willi has recently worked in industries like Retail and Food and Beverage.
Willi has recently worked in business areas like Information Technology and Product Development.
Willi attended FH Dortmund for General Computer Science.
Willi is immediately available full-time for suitable projects.
Daily rate distribution
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Average rates for similar positions
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The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 5 Nov 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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