Karl-W. Geitz

Consulting and development in a greenfield project for acquisition of sensor data.

The new solution is meant to replace an existing system, where most of the logic is hardcoded and which is primarily targeted to the German market.

The new system is meant to support international markets and the logic and configuration can be changed easily.

The new system has to support multiple time zones and international requirements and regulations.

Working closely with the in-house software architect, developing Enterprise Architect models, proof-of-concepts and implementations.

The complete system has a generative approach, where C# code, database, dashboards and reports are generated from compact descriptions.

The system is meant to be stable and secure. Encryption, hashing and signing are used throughout.

After extensive performance measurements and various evaluations, we decided to use the ClickHouse database, which provides excellent performance and rather good SQL compatibility.

Sparx Enterprise Architect, JAMA, Miro.

ClickHouse Database, Linux / Debian / Ubuntu, GitLab.

Docker, Cobasoft Log & LogVw.

Microsoft: Visual Studio, C#, ASP.NET, Test.

HTML5, CSS, JavaScript, JSON.

Edge, FireFox, Chrome, Chromium.

Code and HTML generation.

Existing application was having major performance problems on server and on client.

After extended analysis and troubleshooting we were able to greatly improve performance and stability on both client and server.

We also solved cookie- and login-related problems in the interaction between main application and integrated Docker-based services.

We improved logging performance and stability.

Troubleshooting on memory dumps with console debugger (cdb) and troubleshooting of browser heap dumps with Chromium, Edge and Chrome.

Consolidated the build environment to use framework 4.8 and to reduce build times and errors.

TX TextControl, Infragistics WebUI, Telerik KendoUI.

NServiceBus, Docker, Cobasoft Log & LogVw, WireShark, Fiddler.

Microsoft: Visual Studio, C#, ASP.NET, GIT, Test, Azure, Owin.

HTML5, CSS, NODE, NPM, XML.

Edge, FireFox, Chrome, Chromium, IE.

Development of various, graphical, interactive web controls.

Microsoft Visual Studio, C#, Blazor, Razor Pages, ASP.NET core.

Microsoft SQL Server 2019, Microsoft Team Foundation Server (TFS).

SVG, JavaScript, HTML5, CSS, NODE, NPM, GitLab.

Edge, FireFox, Chrome.

Prototype web application for ECG visualization using SVG and web technologies.

ASP.NET, HTML5, CSS, JavaScript, C#, Active Directory, IIS, Internet Explorer.

Troubleshooting a web application built for Windows 7 using Windows Forms and ActiveX.

Reproduced issues on Microsoft Azure.

Coordinated support requests with Microsoft Support.

Conducted measurements with various troubleshooting tools.

Fiddler, Wireshark, debuggers, Azure virtual machines.

Implementation of LogVw, a viewer for huge text files as console application.

C#, .NET Framework, .NET Core.

Specification, architecture, and development of a web-based application for customer service (CRM) to replace an old application, with complete data and document migration.

The system is used intensively, with approximately 13 million documents and 700,000 logs to date.

Web-based text editor with text modules and templates.

Development of an Exchange connection for email, tasks, and appointments.

Development of an OCR solution for incoming and outgoing invoices and documents.

Specification, architecture, and development of a web-based solution for bill of materials (BOM) management used for production planning, ordering, and configuration of assemblies.

Revision and expansion of the existing ordering system.

Troubleshooting and stabilization of the legacy system.

Microsoft Visual Studio, C#, WebAPI, ASP.NET, MVC, Razor, .NET Core.

Microsoft SQL Server 2019, Microsoft Team Foundation Server (TFS).

Azure DevOps CI/CD, Azure Virtual Machines, Azure Function.

HTML5, CSS, JavaScript, AJAX, jQuery, single-page application (SPA), WebAPI.

Reflector, Fiddler, Cobasoft Generator, OmniPage Pro, Telerik Controls.

Microsoft Exchange, Excel, IIS, Windows Server, Active Directory.

Firebird, TreeSoft Office, IE, Edge, Chrome, FireFox.

Development of various websites, cross-site integration (mashup), and company website.

ASP.NET, HTML 5, CSS, JavaScript, C#, MVC, IIS.

The software is for management and presentation of very large (gigabyte) digital imaging bitmaps.

UI developed exclusively with Web technologies (HTML5, JavaScript, CSS).

Contains very flexible navigation, presentation and modification of images and documents.

Running on Windows, OS-X, iOS (iPad, iPhone), WindowsPhone, Surface and Android.

Interactive drawing, including freehand, possible on all systems, including small screen formats.

Server realized with ASP.NET, MVC-Razor, C# and T-SQL.

Implements Web pages and Web APIs for image and document management.

Contains extensive security features (Users, Groups, Rights, Features) and flexible data management.

Configurable document properties, input forms, and drill down on all document data.

Supports all other kinds of files including PDF and Excel.

Can be installed and run on Microsoft Azure for quick and globally distributed deployments.

Development of an upload utility for very large files and an installer for the server application.

Microsoft Visual Studio 2010-latest, ASP.NET, MVC 4, Razor, .NET Core.

jQuery, DataTable, OpenSeaDragon, Fabric.js.

Microsoft SQL Server 2008-latest, Microsoft Team Foundation Server (TFS), IIS.

DHTML, CSS, JavaScript, AJAX, single-page technology, WebAPI, Web Sockets.

Reflector, Fiddler, Cobasoft Generator.

International client support.

Troubleshooting, debugging, and performance analysis of WCF REST Web Services.

Analysis of User Authentication and Security, COM and RCW debugging.

Setting up Symbol Server with PowerScript and PowerShell.

Involved in Agile Development (SCRUM) for video management, GUI, networking, and databases.

C#, C++, C++/CLI, Visual Studio 2010, 2008, 2005, Active Directory.

TFS, Cruise Control, Wiki, Spring, log4net.

UML, Video Management, GUI, Networking, Database, Graphics.

Debugging and analysis of access violations, heap corruption, and memory overwrites.

Performance analysis and optimization on production virtual-machine systems (vmware).

Evaluation of tools for process improvement, coding styles, and static analysis in C++ and C#.

Presentation and coaching regarding software development process improvement.

CDB, WinDbg, Fiddler, WireShark, Network Monitor, ETW.

Microsoft Visual Studio 2008 performance analysis tools, Intel vTune 3.2.

Microsoft Windows Performance Tools (WPT, XPERF, LOGMAN).

PC-lint, CodeSonar, Coverity Integrity, FxCop, StyleCop.

Engine Trend Monitoring: Improvement and porting of an existing application to Visual Studio 2005.

Workshop about Visual Studio 2005.

Reengineering, Refactoring, Porting.

Windows Forms 2.0, GUI Design, Microsoft Visual Studio 2003/2005.

Oracle 9.2.0.4, trigger, stored procedures, table valued functions.

Merant Dimensions, FarPoint FpSpread, IOCOMP WFPlot.

ADO.NET, SQL, IMAP protocol.

Development of HiPath ProCenter Dialer Server, a complex high-performance server-application using C#, WindowsForms, and SQL.

Porting CRM Sales Support System (Siemens eCRM) from MS-ACCESS to C#, WindowsForms, and SQL.

Architecture and detailed specification of a generic test framework for regression tests (Siemens Med) using Visual C++, MFC, STL, and XML.

Independent development of concepts for tracing, logging, exception handling, and building block integration.

C#, Visual C++, WindowsForms, ADO.NET, SQL, XML, XSD, UML.

MFC, STL, Rational Rose, XPath, MSXML, DOM, ClearCase.

Crystal Reports.

Development of PrimaVista presentation software including pen-support, handwriting recognition, undo/redo, and screenshots.

C++, MFC, Windows NT 4.

Development of VPC33 Viskosimetry-PC for control of burettes and electronics scales.

C, Interfaces, PC.