Peter Thorn - Software Developer

Q: Where is Peter based?

Peter is based in Erlangen, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Peter speak?

Peter speaks the following languages: German (Native), English (Advanced) .

Q: How many years of experience does Peter have?

Peter has at least 34 years of experience. During this time, Peter has worked in at least 7 different roles and for 12 different companies . The average length of individual experience is 2 years and 9 months . Note that Peter may not have shared all experience and actually has more experience.

Q: What is Peter's latest experience?

Peter's most recent position is Software Developer at City Education Office .

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

In recent years, Peter has worked for City Education Office , ILSE Software GmbH & Co. KG , and Own development (freelance) .

Q: Which industries is Peter most experienced in?

Peter is most experienced in industries like Information Technology (IT) , Manufacturing , and Transportation and Logistics . Peter also has some experience in Food and Beverage , Banking and Finance , and Pharmaceutical .

Q: Which business areas is Peter most experienced in?

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

Q: Which industries has Peter worked in recently?

Peter has recently worked in industries like Information Technology (IT) , Transportation and Logistics , and Manufacturing .

Q: Which business areas has Peter worked in recently?

Peter has recently worked in business areas like Information Technology (IT) , Project Management , and Product Development .

Recommended expert

Erlangen, Germany

Experience

Jun 2024 - Jul 2024

2 months

Software Developer

City Education Office

enhancements for the City Education Office in warehouse and inventory management
revision of the picking lists including printing of images
implementation of the output of reservation slips
creation of a delivery routing plan
representing schools as storage locations to track which school has which equipment at any time

Dec 2023 - May 2024

6 months

Software Developer / Database Developer

ILSE Software GmbH & Co. KG

extensive performance improvements for the ILSE Warehouse Manager after hosting the database in a data center
analysis of the impact of moving the SQL Server from a local network to a remote data center
review and optimization of indexes, especially on foreign key tables
conversion of SELECT queries from * to explicit field lists
detailed optimization of complex SQL queries
removal of the 3-tier architecture for bulk data in favor of direct insert SQL statements
avoidance of large object lists each with its own database access routine in favor of working with recordsets
improved overall system performance to the extent that the client decided against replacing the system

Jan 2023 - Dec 2023

1 year

Software Developer

ILSE Software GmbH & Co. KG

adaptation of the ILSE Warehouse Manager to the specific requirements of the pharmaceutical industry
implementation of extended documentation requirements directly in the software
ensuring traceability and compliant processes for pharmaceutical clients

Jul 2020 - Present

5 years 8 months

Software Developer / Project Manager

ILSE Software GmbH & Co. KG

resumption and further development of the warehouse management and food-related features of the ILSE Warehouse Manager for an organic food manufacturer
adaptation to the specific requirements of the organic food sector, especially in traceability, batch management, and best-before dates
continuation of the existing architecture and database extensions while maintaining update capability

Apr 2015 - Oct 2015

7 months

Software Developer

ILSE Software GmbH & Co. KG

extension of the ILSE Warehouse Manager for an industrial company to generate export documents
implementation of support for multiple currencies (Euro, US Dollar)
generation of extensive export documents based on existing inventory and transaction data
implementation of very detailed data import processes
implementation of calculations for commission payments
execution of all extensions in a way that preserves the update capability of the standard software through comprehensive configuration

Jan 2011 - Dec 2013

3 years

Software Developer / Project Manager

ILSE Software GmbH & Co. KG

Extended the ILSE Warehouse Manager into a merchandise management solution with features for quotes, orders, purchase orders, incoming invoices, outgoing invoices, and dunning
Added industry-specific requirements for the food industry (best-before date, batch management, supplier control, returnable packaging management, etc.)
Performed development and database extensions
Managed a team of two other developers

Apr 2007 - Dec 2017

10 years 9 months

Subproject Lead / Software Developer

ILSE Software GmbH & Co. KG

Developed a production control system for a paint finishing company based on the later ILSE Warehouse Manager technology
Mapped goods receipts, goods issues, stock levels, and recipe management
Implemented a solution for creating and managing production orders
Integrated a central controller (Siemens S7) to pass individual components of an order
Sent parameters like mixing speed and temperature to the production
Received feedback of production results (quantity, measurement values) into the system
Handled all phases of the project life cycle: effort estimation, requirements specification, implementation, coordination with customers and involved companies, on-site testing (four-week assignment in Switzerland), acceptance, and subsequent maintenance
Used MS Access as the initial database, later migrated to MS SQL Server
Communicated with the S7 via WinCC to read and write variables
Built this software as the basis for the ILSE Warehouse Manager

Jun 2006 - Present

19 years 9 months

Owner / Managing Director / Software Developer

ILSE Software GmbH & Co. KG

Took over an existing company with solutions for industrial scale integration and tire storage software under the former company implements GmbH
Product responsibility and focus on the solutions:
ILSE Wheel Manager
ILSE Warehouse Manager
Further developed the standard software in VB6 and VB.net
Implemented database logic with MS SQL Server, from simple queries to extensive stored procedures and functions
Used List & Label for report design and analysis
Used SQLite to develop software on mobile devices (e.g. scanners)
Managed sales and maintained intensive, ongoing customer contact
Captured customer requirements, designed solutions, and coordinated concepts with customers
Created concepts, also for internal enhancements
Focused on self-explanatory user interfaces
Designed a database with about 50 tables in the ILSE Warehouse Manager, consistent structure, and used GUIDs as record IDs
Defined and consistently used a unified naming convention for tables, fields, and internal admin fields (creation date, user, last change)
Moved extensive logic into stored procedures and functions for reuse, including by mobile devices
Optimized performance through clean database design and appropriate indexes
Supported a customer base, mainly small and medium-sized businesses
Supported reference customers such as Framatome (using the Warehouse Manager at two sites) and two food manufacturers
Implemented customer-specific customizations while preserving the standard software's updatability

Dec 2005 - Jun 2006

7 months

Neckarsulm, Germany

Software Developer

Lidl Stiftung & Co. KG

Developed a planning system for the Lidl Stiftung to consolidate the individual business units
Strong focus on a high-quality, user-friendly graphical user interface (GUI)
Implemented all read-only database procedures as Oracle packages
Developed .NET components and database logic in Oracle PL/SQL (version 10)
Debugged the packages with Oracle Raptor and used SQL Plus
Technologies: VB.net 2003, VB.net 2005, Oracle 10, PL/SQL, Oracle Raptor, SQL Plus

Aug 2004 - Dec 2009

5 years 5 months

Nuremberg, Germany

Software Developer

Billhöfer Maschinenfabrik

Took over and completed an ERP system after the original vendor went bankrupt
Analyzed and fixed bugs in a large application with 586 forms and around 300 database tables, without existing documentation
Extended the software with new modules in close coordination with the customer
Created requirement specifications and technical documentation
Partially redeveloped components and optimized existing modules
Technologies: VB 6.0, VB.net, ADO, ADO.net, MS SQL Server 7/2000, caseStudio (Charonware), Document!X (innovasis)

Jul 2003 - Jun 2004

1 year

Software Architect / Software Developer

Marketing Agency (> 500 employees)

Responsible for the architecture and implementation of a strategic CRM project (textile database) for a marketing agency with over 500 employees
Objective: Provide key metrics for textile retailers to compare with other retailers and analyze customer buying behavior to improve forecasts
Integrated data from various source systems into a central textile database
Set up a database with around 500,000 customers and about 3,000,000 line item records
Created analyses and reports using Crystal Reports 8.5
Developed a system for automated customer import, including error logs, detection of faulty records, and creation of import logs (replacing manual imports)
Project team size of 3-5 members
Used a class model based on a 3-tier architecture: the GUI only knows business objects, which encapsulate database access
Reusable business objects across different frontends (e.g., VB applications, ASP.NET)
Simplified maintenance and handover to internal/external developers through a consistent class structure
Technologies: VB.NET, MS SQL Server 2000, CaseStudio 2.0 (CASE tool), Visio (class diagrams), Crystal Reports

Aug 2001 - Present

24 years 7 months

Software Developer / Project Manager

Own development (freelance)

Developed a time tracking software that is successfully used in several companies
Project management and coordination throughout the entire development period
Designed and implemented user interfaces
Database design and implementation
Strong focus on clean class design as a basis for a 3-tier architecture
Implemented the application to run as a 3-tier system (clear separation of GUI, business logic, and data access)
Used a class model that enables reuse of business objects in different applications (e.g., VB clients and ASP.NET)
Simplified maintenance and handover to other developers through a consistent class structure
Technologies: Delphi 6.0, Interbase 6.0.1, Star-Designer, Interbase-Expert (IB-Expert)

Dec 2000 - Apr 2002

1 year 5 months

Frankfurt, Germany

Software Developer

Dresdner Bank AG

Worked on the BUS 2.0 project (Advisor Support System) at Dresdner Bank AG
Maintained and enhanced the existing BUS system in the lending area
Developed new workflows and business services
Extracted data to create reconciliations between the Siebel system and host systems
Performed error analysis and bug fixing in production operation
Created technical designs to implement new requirements
Participated in creating the master plan for further development in the loans area
Worked on the Basel II project focusing on technical design, analysis, and workflow design
Extensive scripting tasks with eScript and Siebel VB
Technologies: Siebel 6.3, Siebel Tools, MS Access 97

Aug 2000 - Nov 2000

4 months

Karlsruhe, Germany

Software Developer

Siemens AG

Evaluated different installation options for Siebel version 99.5
Connected Siebel as an OLE server to Visual Basic programs
Installed and configured various Siebel clients (Thin Client, Remote Client, tools)
Technologies: Siebel 99.5 Server, Siebel Tools, VB 6.0

Jan 2000 - Apr 2000

4 months

Nuremberg, Germany

Software Developer

Nürnberger Insurance Group

Designed, implemented, and tested new modules for visualizing insurance data
Used a 3-tier architecture separating GUI, business objects, and data access
Integrated business objects as OCX components
Generated type libraries with Rational Rose 98
Used UML for class and interface design
Responsibilities: design, implementation, class and interface design, documentation
Technologies: VB 6.0 Enterprise, Oracle 8.0, Rational Rose 98, Windows NT 4.0, Farpoint Spread 3.0

Aug 1999 - Dec 1999

5 months

Luxembourg

Software Developer

ADIG Luxemburg S.A.

Contributed to a fund administration system for ADIG Luxemburg S.A.
Designed and implemented change requests from business departments
Implemented new and modified features in live operations
Technologies: Clipper 5.2e, Novell, Windows NT 4.0

Feb 1998 - Jul 1999

1 year 6 months

Germany

Software Developer

Deutsche Bundesbank

Developed a subproject (Bid Workstation) for the Deutsche Bundesbank's automated bidding system
Designed, implemented, tested, and documented the Bid Workstation that manages bids from commercial banks
Implemented as an MDI application using an object-oriented extension of Visual Basic (framework)
Used a 3-tier architecture (GUI, business logic, data access)
Used UML for technical documentation and class design
Used S-Designer for database design
Tasks: design, class design, table design, implementation, testing, documentation
Team size: 7 members
Technologies: Windows NT 4.0 Workstation (client), Windows NT Server, Oracle 8.0.5, Rational Rose 97, Star-Designer 5.1, VB 5.0 Enterprise, Farpoint Spread 3.0

Oct 1997 - Jan 1998

4 months

Erlangen, Germany

Software Developer

Siemens AG

Modeled classes and built tools for integrating VB code into the marketing software SAM (Siebel Automation Marketing)
Developed various VB classes for use in SAM
Developed a tool to read data from CD and import it into an Oracle database
Tasks: design, implementation, testing, documentation
Technologies: Siebel Automation Marketing (SAM), Oracle, MS Access 97, VB 5.0, PL/SQL, Excel VBA

Jan 1992 - Sep 1997

5 years 9 months

Programmer

Various Companies

Worked as an employed programmer at various companies
Started working with Clipper 5.01 in 1992
Contributed to a wide range of software projects across different industries
Regularly responsible for requirements specification and documentation
Developed and maintained applications, mainly in Clipper and related technologies

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 (31 years), Manufacturing (21.5 years), Transportation (19.5 years), Food and Beverage (8.5 years), Banking and Finance (3 years), and Pharmaceutical (1 year).

Information Technology

Manufacturing

Transportation

Food and Beverage

Banking and Finance

Pharmaceutical

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 (34 years), Product Development (26 years), Project Management (24.5 years), Sales (19.5 years), Operations (10.5 years), and Finance (1.5 years).

Information Technology

Product Development

Project Management

Sales

Operations

Finance

Skills

Professional Focus And Activities

It Experience Since 1989
Analysis
Design
Data Modeling
Software Development
Implementation
Testing
Documentation
User Training

Focus / Special Skills

Graphical User Interfaces
Database Setup Including Optimization
Programming
Extensive Sql Knowledge
Requirements And Specifications Creation
Project Management

Operating Systems

All Versions Of Windows
Novell

Programming Languages

Vb.net
Vb6
C#
Java (Basic)
Access-vba
Siebel Vb
Siebel Escript
Clipper

Development Tools

Sevcontrols
Spread 3.0
Truedbgrid
Sqlite
Componentone Enterprise Studio
Git (Version Control)
Sourcesafe (Older Version Control)

Databases

Ms Sql Server (Since 2000)
Ms Access
Dbase
Oracle
Firebird
Mysql

Methods

Ooa
Ood
Uml
Database Design (Derived From Class Design)

Tools

Rational Rose
Ms Project
Mind Mapping Tools

Standard Software

Ms Office
Textmaker

Industries

Logistics
Mechanical Engineering
Retail
Insurance
Banking
Fund Companies.

Languages

German

Native

English

Advanced

Education

IT Clerk

Profile

Created

November 2024

Last Update

November 2025

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Frequently asked questions

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

Where is Peter based?

Peter is based in Erlangen, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Peter speak?

Peter speaks the following languages: German (Native), English (Advanced).

How many years of experience does Peter have?

Peter has at least 34 years of experience. During this time, Peter has worked in at least 7 different roles and for 12 different companies. The average length of individual experience is 2 years and 9 months. Note that Peter may not have shared all experience and actually has more experience.

What roles would Peter be best suited for?

Based on recent experience, Peter would be well-suited for roles such as: Software Developer, Software Developer / Database Developer, Software Developer / Project Manager.

What is Peter's latest experience?

Peter's most recent position is Software Developer at City Education Office.

What companies has Peter worked for in recent years?

In recent years, Peter has worked for City Education Office, ILSE Software GmbH & Co. KG, and Own development (freelance).

Which industries is Peter most experienced in?

Peter is most experienced in industries like Information Technology (IT), Manufacturing, and Transportation and Logistics. Peter also has some experience in Food and Beverage, Banking and Finance, and Pharmaceutical.

Which business areas is Peter most experienced in?

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

Which industries has Peter worked in recently?

Peter has recently worked in industries like Information Technology (IT), Transportation and Logistics, and Manufacturing.

Which business areas has Peter worked in recently?

Peter has recently worked in business areas like Information Technology (IT), Project Management, and Product Development.

What is Peter's education?

Peter attended education in IT Clerk.

What is the availability of Peter?

Peter is immediately available part-time for suitable projects.

What is the rate of Peter?

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