References

Client Projects (Selection)

From auditing to automotive to the energy sector — deployed since 1999.

E-ON

EnviaM

Marquard & Bahls

Sparkasse

Francotyp-Postalia

Gazprom

KPMG

RTL

Deutsche Bahn

Scandlines

BearingPoint

Volkswagen

Kraftanlagen München

Bayootec

01/2026 – heute ad849f2

HEAD → main

ad849f2 01/2026 – heute

Bayootec

Active

Developer · Utilities

Software development and architecture, requirements engineering, testing and application support.

C# ASP.NET Core NextJS TypeScript Azure SQL Server Claude Code

01/2022 – 12/2025 bde7f30

bde7f30 01/2022 – 12/2025

E-ON / EnviaM

Completed

Developer · Energy & Utilities

Enhancement of E.ON and EnviaM web presence with Sitefinity 15, ASP.NET MVC and Angular. Technical analysis in Application Insights with KQL. Development of new features like branch finder and energy house.

C# .NET 4.8 .NET Core Angular Sitefinity 15 Azure DevOps TypeScript Stencil

05/2021 – 12/2021 6cf9688

6cf9688 05/2021 – 12/2021

Marquard & Bahls / Oiltanking GmbH , Hamburg EN

Completed

Developer · Energy & Chemical / Tank Storage

Development and operation of the supply chain management solution Newton@OTNA for group subsidiary Oiltanking in an international agile team (Kanban). Design and implementation of UI screens and business logic.

Comprehensive unit and integration testing for quality assurance. Bug and performance analysis as part of product maintenance. Reporting with Microsoft SQL Server Reporting Services.

C# .NET Core WPF Reactive UI SQL Server Azure DevOps

02/2020 – 05/2021 9cc3b5a

9cc3b5a 02/2020 – 05/2021

Sparkasse - Rating- und Risikosysteme , Berlin

Completed

Developer · Banking

ETL of approx. 4 billion records for risk assessment, provided by around 400 German savings banks. Implementation of transformations per specification, performance optimization for data loading and writing, code reviews and bug fixing for IDH import from IBM DB2.

Training of internal developers on dependency injection with AutoFac, blocking collections (consumer/producer pattern) and TPL DataFlow, design patterns in C#, async programming, and unit testing with Moq.

C# .NET Core SQL Server IBM DB2 AutoFac TPL DataFlow Hangfire

04/2020 – heute 9b3cc12

9b3cc12 04/2020 – heute

Deutsche Bahn , Wittenberge

Active

Project Lead & Developer · German Railways

Migration of existing wheelset data capture (RDE) to AWS Cloud. SQL Server database migrated to Amazon RDS. Monitoring solution built with Kibana and Elastic Stack. Comprehensive performance and security testing to ensure stable operations.

C# .NET Core AWS Amazon RDS Kibana

04/2017 – 12/2019 d7fcf64

d7fcf64 04/2017 – 12/2019

Francotyp-Postalia , Berlin EN

Completed

Developer · Industrial Machinery

Development of a customer portal with Sitefinity 12, hosted on AWS Cloud. Dashboard with real-time franking machine data (ink levels, consumables, SMS texts). Knowledge base with troubleshooting and FAQ. Integration of various SQL Server and MySQL databases.

Backend system integration with SAP, Exact Synergy and Navision. Automated build and deployment pipelines with Jenkins.

C# Sitefinity 12 ASP.NET MVC AngularJS AWS Jenkins PowerBI

04/2016 – 03/2017 eb86d29

eb86d29 04/2016 – 03/2017

Gazprom Germania , Berlin

Completed

Developer · Gas Trading

Risk management database manager: administration and analysis of risk factors, import of time series and contract data from various source systems, data consolidation and KPI visualization in reports.

Filling station manager: enhancement of the station management system, OpenStreetMap server optimization (tile prerendering), new analytics tools and reports.

C# DevExpress SAP .NET Connector OpenStreetMap PostgreSQL

2015 – 2016 aee8bc5

aee8bc5 2015 – 2016

GISA (enviaM) , Chemnitz

Completed

Developer · Energy

Migration of existing CMS to Sitefinity. Widget development, training for internal developers.

Sitefinity 8 C# ASP.NET MVC AngularJS Bootstrap SASS

12/2013 – 11/2014 2e5b4c5

2e5b4c5 12/2013 – 11/2014

KPMG , Berlin

Completed

Technical Project Lead · Auditing

Planning and development of a staff scheduling system. Leading a frontend team of four developers.

C# WPF DevExpress MVVM Async/Await Reactive Extensions

06/2012 – 12/2013 aca36be

aca36be 06/2012 – 12/2013

Mediengruppe RTL , Köln

Completed

Developer · Film & Television

Material management for 1,500 users. Registration and ordering of broadcasts, web services with WebAPI.

C# DevExpress SQL Server ASP.NET MVC WebAPI Bootstrap

2004 – 2015 6508427

6508427 2004 – 2015

GTE-Com GmbH , Berlin

Completed

Technical Project Lead · IT Consulting

Leading development teams of up to 10 members. Projects at KPMG, RTL, Kraftanlagen München and Scandlines.

C# VB.NET SQL Server ASP.NET WPF

2002 – 2004 36eddbe

36eddbe 2002 – 2004

BearingPoint (KPMG Consulting) , Berlin

Completed

Senior Consultant · IT Consulting

Analysis and design of enterprise solutions. Highly scalable SQL Server databases (>40 GB). Automotive projects at Volkswagen, BMW and AVL-Graz.

SQL Server VB.NET COM+

1999 – 2002 19391a1

19391a1 1999 – 2002

KPMG Deutsche Treuhand , Berlin

Completed

Systems Developer · Auditing

Development of KPMG publication database, hotel database, Documentum 4i systems and various applications.

SQL Server ASP Visual Basic Documentum