Stefan Wimmer - Architect/Software Developer/Infrastructure

Recommended expert

Ottobrunn, Germany

Experience

Mar 2025 - Present

11 months

Architect/Software Developer/Infrastructure

HDI

Migration of database servers and application servers to the new environment (infrastructure, WPF applications, ASP.NET applications, Excel)
Replacement of migrated applications with new applications through new developments
Creation of CI/CD pipelines
System: Windows 11, Windows Server 2022
Technologies: Microsoft .NET 4.8, ASP.NET, WPF, Oracle, MSSQL, SSRS, Azure, Azure Blob Storage
Languages: C#, MVVM, VBA
Tools: Microsoft Visual Studio .NET 2022, Azure Storage Explorer
Database: Oracle, MSSQL
Industry: Insurance

May 2023 - Jul 2024

1 year 3 months

Architect/Software Developer

G+D

Further development of the Zeus project
Bug fixing
Implementation of new features
Data modeling
Refactoring of old code
System: Windows 10, Windows 11
Technologies: Microsoft .NET 4.8, WPF, Oracle, Git, Scrum, Docker, Kubernetes
Languages: C, C++, C#, XML, XSLT, XSD, Unity, MVVM, Design Patterns, PL/SQL
Tools: Microsoft Visual Studio .NET 2022, Git, Jira, Docker, Oracle SQL Developer, Oracle SQL Developer Data Modeler
Database: Oracle, SQLite
Industry: Manufacturing

Jan 2022 - Present

4 years 1 month

Software Developer

Own Development

Setup of the PV system in the solar display
Creation of charts using Grafana
System: Raspberry Pi, Linux
Technologies: Docker, WAGO controller
Languages: C#, C++, Grafana
Database: MariaDB

May 2021 - Dec 2022

1 year 8 months

Architect/Software Developer

Zeppelin Rental GmbH

Creation of databases with PostgreSQL
Development of services based on OpenAPI
Development of a GUI with Angular 12, accessing services from the GUI
Creation of integration tests for testing the services
Creation of tests for Angular components
Development of controls
Creation of reports with Stimulsoft
Responsive Design
Data modeling
System: Windows 10
Technologies: Microsoft .NET 6, Stimulsoft, Scrum, RabbitMQ
Languages: C#, Design Patterns, TypeScript, Angular 12, Swagger, JavaScript
Tools: Microsoft Visual Studio .NET 2019, Swagger, Git, pgAdmin
Database: PostgreSQL 12
Industry: Manufacturing

Jun 2019 - Nov 2019

6 months

Vienna, Austria

Software Developer

Allianz Vienna

Support for multilingual features (German, English)
System: Windows 10, Linux
Technologies: Microsoft .NET 4.6, WinForms
Languages: C#, C, C++
Tools: Microsoft Visual Studio .NET 2019 Enterprise, Excel, Git, Oracle SQL Developer, Oracle SQL Developer Data Modeler
Database: PostgreSQL, Oracle
Industry: Insurance

Jul 2018 - Dec 2020

2 years 6 months

Software Developer

Roche Diagnostics GmbH

GUI development for a recipe software using WPF
Development of a web application using ASP.NET MVC
Display and editing of business process model diagrams using BPMN IO
Refactoring
System: Windows 10
Technologies: Microsoft .NET 4.6, Design Pattern, Prism, Unity, WPF, ASP.NET MVC, .NET Core, gRPC, Microsoft Entity Framework, NHibernate, Azure
Languages: C#, XML, Unity, Prism, Design Patterns, JavaScript, TypeScript, Node.js, Java
Tools: Microsoft Visual Studio .NET 2019 Enterprise, DevExpress
Database: Microsoft SQL Server 2019
Industry: Pharma

Jul 2018 - May 2020

1 year 11 months

Software Developer

Munich Reinsurance AG

Development and maintenance of an Excel add-in using VSTO
Data modeling
Data comparison
System: Windows 10
Technologies: Microsoft .NET 4.6, Design Pattern
Languages: C#, VSTO, Design Patterns
Tools: Microsoft Visual Studio .NET 2017 Enterprise, Excel, Oracle SQL Developer, Oracle SQL Developer Data Modeler
Database: Oracle
Industry: Insurance

Nov 2017 - Jun 2018

8 months

Software Developer

AKDB

Development of forms using ASP.NET MVC
Migration of COBOL code to C#
System: Windows 10
Technologies: Microsoft .NET 4.5, ASP.NET 4.5, ASP.NET MVC, RESTful services, Microsoft Entity Framework 6.1, NuGet, NPM, WCF, Design Pattern
Languages: C#, XML, XSD, Autofac, Design Patterns, jQuery, JavaScript, COBOL
Tools: Microsoft Visual Studio .NET 2015 Ultimate
Database: Microsoft SQL Server 2019
Industry: Public sector

Jun 2014 - Nov 2017

3 years 6 months

Software Developer

UniCredit AG

Development of forms using AngularJS
Development of components with Angular 2
Use of NHibernate and Entity Framework as OR mappers
Development of RESTful services
Long experience with the USP framework
Access to Oracle databases
System: Windows 7
Technologies: Microsoft .NET 4.5, ASP.NET 4.5, ASP.NET MVC, RESTful services, Microsoft Entity Framework 6.1, NHibernate, NuGet, NPM
Languages: C++, C#, XML, XSD, Spring.NET, Design Patterns, jQuery, NVelocity, AngularJS, Angular 2, JavaScript, TypeScript, PL/SQL
Tools: Microsoft Visual Studio .NET 2015 Ultimate
Database: Microsoft SQL Server 2008 R2, Oracle
Industry: Banking

Feb 2014 - May 2014

4 months

Developer

Hausbank eG

Creation of documentation for an existing system (installation guide, specifications)
Creation of test cases
System: Windows Server 2008 R2
Technologies: Microsoft WinForms, Crystal Reports
Languages: C#, PL/SQL
Tools: Microsoft Visual Studio .NET 2008
Database: Oracle 11g
Industry: Banking

Sep 2013 - Sep 2013

1 month

Consultant

Qunis GmbH

Embedding the ASP.NET ReportViewer control into a web page
Creating reports
System: Windows Server 2012, SharePoint 2013
Technologies: Microsoft ASP.NET 4.0, SSRS 2012
Languages: C#
Tools: Microsoft Visual Studio .NET 2010
Database: Microsoft SQL Server 2012
Industry: Business Intelligence

Jul 2013 - Oct 2013

4 months

Architect/Software Developer

Asset Media Ltd.

Developing a web application to evaluate the quality of websites
Using SSRS 2008 R2 to create reports
System: Windows Server 2008 R2
Technologies: Microsoft ASP.NET 4.0, SSRS 2008 R2, Microsoft ASP.NET MVC 4.0
Languages: C#, Design Patterns
Tools: Microsoft Visual Studio .NET 2012 Premium
Database: Microsoft SQL Server 2008 R2
Industry: Web Design

Apr 2012 - Apr 2012

1 month

Software Developer

ZERO-Lacke

Creating a cube for an ERP system (Microsoft Dynamics AX) to analyze sales
Creating reports for the cube
System: Windows 7, Windows Server 2008 R2
Technologies: Microsoft Analysis Services (SSAS), Microsoft Reporting Services (SSRS)
Languages: MDX, T-SQL
Tools: SQL Server Business Intelligence Development Studio 2008
Database: Microsoft SQL Server 2008
Industry: Manufacturing

Mar 2012 - Oct 2013

1 year 8 months

Architect/Software Developer

EDAG GmbH & Co. KGaA.

Designing a .NET architecture for an existing Excel application
Implementing the architecture with C#
Using design patterns
Creating the database model
Using Microsoft's Entity Framework
System: Windows 7, Windows Server 2008 R2
Technologies: Microsoft .NET 4.0, WPF, MVVM
Languages: VB.NET, C#, XML, XSLT, XSD, Spring .NET, Unity, AOP, Design Patterns, PL/SQL
Tools: Microsoft Visual Studio Ultimate .NET 2010
Database: Oracle 11g
Industry: Manufacturing

Feb 2011 - May 2011

4 months

Software Developer, Architect

Bayerisches Landesamt für Denkmalpflege

Developing web services
Accessing the database via ADO .NET Entity Framework
System: Windows 7, Windows Server 2003, Windows Server 2008 R2
Technologies: Microsoft .NET 3.5, IIS
Languages: C#, T-SQL, WCF
Tools: Microsoft Visual Studio .NET 2008
Database: Microsoft SQL Server 2005
Industry: Government

Dec 2010 - Jan 2011

2 months

Software Developer, Architect

TECOPS GmbH

Development of a vacation planner as a web application (personnel management, holiday management, reports, leave requests)
System: Windows 7, Windows Server 2003, Windows Server 2008 R2
Technologies: Microsoft .NET 3.5
Languages: C#, ASP.NET 3.5, T-SQL, Ajax, Active Directory
Tools: Microsoft Visual Studio .NET 2008, Ajax Control Toolkit
Database: Microsoft SQL Server 2005
Industry: IT personnel service provider

Jul 2010 - Nov 2024

14 years 5 months

Architect/Software Developer

Knorr Bremse Deutschland

Created requirements using Enterprise Architect
Developed an abstract XML description language
Built a framework to manage abstract elements
Used WPF to display objects
Created reports for Microsoft Project 2010
Used design patterns (MVVM, Singleton, Factory, Adapter)
Developed high-level and detailed design
Used the UML features of Visual Studio 2022
Migrated legacy data, created SSIS packages
Refactored old code
System: Windows 10
Technologies: Microsoft .NET 4.5, WPF, Microsoft Project 2010, SSRS, SSIS, .NET MAUI
Languages: C++, C#, XML, XSLT, XSD, Spring .NET, Unity, AOP, MVVM, Design Patterns, Java
Tools: Microsoft Visual Studio .NET 2019/2022, Microsoft Office 2003, Altova XML Spy 2013, Enterprise Architect, Actipro Software Syntax Editor, Microsoft Business Intelligence Studio 2008, Infragistics, Git, Jira, SQL Developer, Oracle SQL Developer Data Modeler
Database: Microsoft SQL Server 2008 R2, Microsoft SQL Server 2012/2014/2019, Oracle, MySQL
Industry: Industry

Mar 2010 - Jul 2010

5 months

Wiesbaden, Germany

Architect/Software Developer

R+V Versicherung Wiesbaden

Revised an existing .NET 3.5 application
Separated GUI and business logic
System: Windows Vista
Technologies: Microsoft .NET 3.5, WinForms
Languages: C#, ADO.NET, LINQ
Tools: Microsoft Visual Studio .NET 2008, Microsoft Office 2007, SQL*Plus, Devexpress
Database: Microsoft SQL Server 2005, Oracle 10g
Industry: Insurance

Dec 2009 - Mar 2016

6 years 4 months

Architect/Software Developer

BSH Bosch Siemens Hausgeräte GmbH

Provided Excel templates for download via an ASP.NET application (based on permissions)
After editing, Excel files are uploaded through the same application and the OLAP cube is recalculated
Exported and imported Excel files using OOXML
Generated ASP.NET pages using XSLT templates
System: Windows XP
Technologies: Microsoft .NET 4.5
Languages: C#, ADO.NET, XML, OLAP, MDX, SSIS, ASP.NET, XSLT, XPath, OOXML 2.0, SSIS, SSRS
Tools: Microsoft Visual Studio .NET 2008, Microsoft Office 2010, SSMS
Database: Microsoft SQL Server 2005/2008/2012/2014, Analysis Services
Industry: Industry

Nov 2009 - Feb 2010

4 months

Software Developer, Architect

Axa

Developed an application for comprehensive customer consulting
Built a data model using the ADO.NET Entity Framework
Used WPF for the GUI
Designed XAML files with Expression Blend
Created automated builds with MSBuild
Developed a setup program with Visual Studio 2008
System: Windows XP, Windows Vista, Windows 7
Technologies: Microsoft .NET 3.5, Silverlight 3
Languages: C#, ADO.NET Entity Framework, XML, XSD
Tools: Microsoft Visual Studio .NET 2008, Infragistics, WPF Toolkit, Expression Blend 3, Team Foundation Server 2008
Database: Microsoft SQL Server Compact Edition 3.5, Microsoft SQL Server 2008
Industry: Insurance

Sep 2009 - Nov 2009

3 months

Software Developer, Architect

TÜV Süd

Creation of an application using the .NET Compact Framework 3.5 to generate reports for cars and trucks
Synchronization of the mobile application with the server
System: Windows XP, Windows Mobile 6.1
Technologies: Microsoft .NET 3.5
Languages: C#, ADO.NET, XML, XSD
Tools: Microsoft Visual Studio .NET 2008, Resco, Smart Device Framework
Database: Microsoft SQL Server Compact Edition 3.5
Industry: Manufacturing

Sep 2008 - Feb 2009

6 months

Architect/Software Developer

BSH Bosch Siemens Hausgeräte GmbH

Implemented an existing Excel solution to a .NET 3.5 solution
Analyzed existing Excel data and created a data model
Stored all relevant data in a SQL Server 2005 database
Built a data warehouse to enable OLAP access to the data
Set up dimensions, measures and measure groups with Visual Studio 2008
Developed a WinForms application for data entry and display of calculated fields
System: Windows XP
Technologies: Microsoft .NET 3.5
Languages: C#, ADO.NET, XML, XSD, OLAP, MDX, SSIS
Tools: Microsoft Visual Studio .NET 2008, Microsoft Office 2003, SSMS 2005
Database: Microsoft SQL Server 2005, Analysis Services 2005
Industry: Manufacturing

Apr 2008 - Sep 2009

1 year 6 months

Software Developer

MTU Aero Engines

Developed configuration software for engine controllers with .NET 3.5 following DO-178B
Displayed analog and digital signals from the engine controller in plots and gauges
Implemented tests
System: Windows XP
Technologies: Microsoft .NET 3.5
Languages: C#, ADO.NET, XML, XSD
Tools: Microsoft Visual Studio .NET 2008, Dimensions, Infragistics, IOComp Plotpack, Liquid XML Studio 2008, Microsoft Word 2003
Industry: Manufacturing

Apr 2008 - Jun 2008

3 months

Software Developer

MobileX AG

Enhanced a mobile application using Devexpress components following the MVC pattern
System: Windows XP
Technologies: Microsoft .NET 2.0
Languages: C#, ADO.NET
Tools: Microsoft Visual Studio .NET 2005, Subversion, TortoiseSVN, Devexpress
Database: SQLite
Industry: Manufacturing

Oct 2007 - Dec 2007

3 months

Software Developer

ThyssenKrupp Präzisionsschmiede

Created a framework for BDE (shop floor data collection)
Reporting with Crystal Reports and Visual Studio 2005
System: Windows XP
Technologies: Microsoft .NET 2.0
Languages: VB.NET, ADO.NET, PL/SQL, Crystal Reports
Tools: Microsoft Visual Studio .NET 2005
Database: Oracle 9
Industry: Manufacturing

Sep 2007 - Mar 2008

7 months

Software Developer

Paccar Ltd.

Extended the MKF framework (Modular Component Framework) used to build large ASP.NET applications (>3000 PCs)
Developed client- and server-side modules for the application.
Worked with very large tables in the application (>100 million records)
Created and optimized stored procedures (T-SQL).
Created web tests and database tests using VSTS 2008.
System: Windows 2000/XP, Windows Server 2000/2003
Technologies: Microsoft ASP.NET 2.0, AJAX
Languages: C#, JavaScript, T-SQL, XML
Tools: Microsoft Visual Studio .NET 2005, TFS 2008, VSTS 2008
Database: SQL Server 2000/2005
Industry: Manufacturing

May 2007 - Jun 2007

2 months

Software Developer

TECOPS GmbH

Managed candidate profiles using ASP.NET 2.0 as frontend and MS SQL Server 2005 as backend. Main tasks were database modeling and creating stored procedures.
Created reports with MS SQL Server 2005 Reporting Services and integrated them into an ASP page.
Built database-driven ASP pages and optimized them for large datasets. Used full-text search to find profiles.
System: Windows XP, Windows Server 2003
Technologies: Microsoft .NET 2.0
Languages: C#, VB.NET, ASP.NET 2.0, T-SQL, SQL Server 2005 Reporting Services and Notification Services
Tools: Microsoft Visual Studio .NET 2005
Database: Microsoft SQL Server 2005
Industry: IT staffing agency

Sep 2006 - Present

19 years 5 months

Architect/Software Developer

Eigenentwicklung

Created a website using ASP.NET 2.0 and MS SQL Server 2000 as the database for DEX registration and feedback.
DEX Dynamic Explorer: built a tool for easy access to file paths on desktop and web.
Technologies: Microsoft ASP.NET 2.0, .NET 2.0, MFC
Languages: C#, XML, UML, web services, C++, STL, shell scripting
Tools: Visual Studio 2005, Photo Impact 11 (graphics), Platform SDK
Database: SQL Server 2000

Jan 2000 - Present

26 years 1 month

Architect/Software Developer

Eigenentwicklung

Developed invoicing software for veterinarians using Microsoft Access 2010
Created a client version with Microsoft Access XP/2007/2010
Used SQL Server 2000 as the database
Built a version with .NET Compact Framework 2.0 for mobile devices (Pocket PCs) using MS SQL Server Compact as the database. Tuned performance for a large number of customers and items.
Developed diary applications on the Pocket PC
Entered clients, patients, treatments, and medications on the PDA
Printed receipts on a thermal transfer printer via Pocket PC
Developed test plans for quality assurance
Generated e-invoices from the program (X-Factura, ZUGFeRD)
System: Windows 2000/XP/Vista/10/11, Linux, Red Hat Enterprise
Technologies: Microsoft .NET 1.1/2.0 WinForms, .NET 8.0, Microsoft Compact Framework 2.0, Microsoft Office, .NET MAUI, Docker, Xcode
Languages: C#, VBA, XML, UML, XAML
Tools: Microsoft Access 97/2003/2007/2010/2021, SSIS, SSRS
Database: Access XP/2007, SQL Server 2000/2005/2008/2012/2019, SQL Server Compact Edition 3.1, Snapshot Replication
Industry: Veterinary

Jan 2000 - Apr 2001

1 year 4 months

Software Developer

Compear AG

Developed a Java application to create insurance rates
Built a Pocket PC application using MFC
Languages: Java, Java Swing
Tools: Visual Studio 6.0
Industry: Insurance

Jan 2000 - Dec 2000

1 year

Software Developer

Ambulante Pflegedienste

Developed an application for outpatient nursing services using Microsoft Access

Oct 1998 - Sep 2007

9 years

Architect/Software Developer

Münchner Rückversicherungs AG

Atom Designer: developed a tool in Visual C++ for interactive graphical creation of mathematical models. Models and components can be analyzed using tabular and graphical views. Implemented interfaces to Excel and XML.
Created pivot tables in Excel 2003 to analyze accounting data in Microsoft Access.
Anjapro: developed the interface of a tool for loss reserves (MFC/C++, later .NET 2.0/Oracle/Web services). Modeled the database and provided business objects for web services. Implemented a role-based access system.
IBNR Platform: created use cases and implemented the product over several iterations. Connected to the business data warehouse and interfaces to FSRI. Implemented Excel exports/imports via ADO.NET. Ensured quality using TestDirector/Quality Center.
Automated Excel 2003, Word 2003, and PowerPoint 2003 in various small projects.
RAC Review Tool Plus: developed an audit tool for underwriters to evaluate policies/claims. Created a summary tool for tabular and graphical overall analyses. Data exchange via compressed XML files.
RAC Analyser: developed a tool for data analysis and report generation for any data. Analyses with Access 2003 and Oracle 9.
Atom Script: developed a tool in Visual C++ for the reserving process. Developed a C++ parser and a custom language for automatic GUI generation. Built a print engine for tables and graphics output.
Technologies: .NET 2.0, MFC, .NET 1.1, ADO.NET, COM, XML, VBA, Excel 2003, Access 2003, Oracle 8/9/10g, SQL/PLSQL, UML.
Tools: Visual Studio 6.0/2003/2005, Visual SourceSafe, Team Foundation Server, Toad, TestDirector/Quality Center, Rational Rose, Infragistics, Dundas.

Sep 1998 - Dec 1998

4 months

Software Developer

Fa. Käsbeitzer GmbH

Developed an application in Microsoft Access to create delivery notes, invoices, reminders, and consolidated invoices
Database: Microsoft Access 97/XP/2003
Industry: Trade

Mar 1998 - Sep 1998

7 months

Munich, Germany

Software Developer

Siemens AG

Migrated the customer and order database PN (private networks) to SAP
Developed an interface to SAP (data model adjustments, Oracle database modifications, updates to C programs) for data transfer between the server and SAP
Languages: C, PL/SQL
Tools: SQL*Plus
Database: Oracle 7/8
Industry: Telecommunications