Johannes Euteneier

Freelance Software Consultant

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Dreieich, Germany

Experience

May 2023 - Present
2 years 9 months

Freelance Software Consultant

S|R Software GmbH & Co. KG

  • Provided consulting for modernizing legacy applications
  • Delivered critical features under tight deadlines for backend and frontend
  • Technologies: C#, .NET, WPF, WCF, REST, Angular, MS SQL Server
Nov 2022 - Present
3 years 3 months
Frankfurt, Germany

Freelance Senior Software Engineer

Continental AG

  • Designed and implemented distributed, full-stack applications for automated ECU flashing, production control, and system monitoring
  • Delivered scalable and maintainable backend and frontend architectures using .NET and Angular
  • Built and maintained CI/CD pipelines in Azure DevOps and containerized applications with Docker
  • Integrated Blockly to enable configurable, domain-specific workflow logic in production environments
  • Technologies: .NET 6-9, C#, Angular 2+, WinForms, WPF, Docker, Azure DevOps, REST, RabbitMQ, MQTT, SignalR, Keycloak, PostgreSQL, Oracle, Elasticsearch, Blockly
Feb 2021 - Oct 2022
1 year 9 months

Senior IT Consultant / Software Developer

valantic STI GmbH

  • Delivered software for ECU flashline systems with a focus on cybersecurity at Continental
  • Refactored and optimized administrative tools for the City of Frankfurt
  • Enhanced internal tools and services
  • Technologies: C#, WinForms, Blazor, SQL Server, Oracle, Azure DevOps, Azure Cloud
Oct 2019 - Jan 2021
1 year 4 months

Technical Project Lead / Software Developer

IQ-Optimize Software AG

  • Led development of campaign and customer retention tools
  • Refactored and optimized a high-volume SIM card ordering application to improve performance and scalability
  • Designed data cleanup and archival utilities
  • Migrated legacy WinForms to ASP.NET MVC
  • Technologies: C#, .NET Framework, ASP.NET MVC, WinForms, Informix, MySQL, MS SQL Server, Netezza, Linux/Bash
Jun 2009 - Sep 2019
10 years 4 months

Software Architect & Developer

S|R Software GmbH & Co. KG

  • Designed and developed a complete rental, POS, and warehouse management system, including a touch-optimized interface, backend API, and the migration from a monolithic application to a scalable client-server architecture
  • Migrated databases from Jet to MS SQL Server with custom tooling
  • Integrated various third-party APIs and device drivers
  • Technologies: WPF, C#, .NET Framework/Core, WCF, ASP.NET, WinForms, VB6, MS SQL Server, Jet, Access, List & Label, SOAP, REST, XML
Sep 2006 - May 2009
2 years 9 months

Software Developer

pawisda systems GmbH

  • Developed low-level backend services and drivers for document and print management
  • Built a PDF library in C++ and fax server under SuSE Linux
  • Technologies: C++, C, Tcl/Tk, PostgreSQL, PHP, HTML, NSIS, MSI, SuSE Linux
Jan 2000 - Dec 2006
7 years

Research Assistant

FernUniversität Hagen

Jan 2000 - Dec 2006
7 years

Co-founder

First Aid Computerservice GbR

Provided IT services and support

Jan 2000 - Dec 2006
7 years

QA Tester

Sunflowers

Tested games including "Anno 1503" and "Knights of Honor"

Summary

Senior Software Engineer and Architect with 20 years of experience in designing, developing, and modernizing business-critical applications. Specialized in Microsoft technologies (.NET Core, C#) and modern frontend frameworks like Angular. Extensive experience in full-stack development, technical project leadership, and systems used in the automotive domain. Proven track record in building distributed and scalable solutions for automotive production environments, with a focus on ECU flashing, monitoring, and control systems.

Skills

Languages

  • C#, Typescript, Javascript, C/c++, Vb6, Html, Css

Frameworks/tools

  • Angular, .Net, Wpf, Winforms, Wcf, Blazor, Rest, Soap, Git, Azure Devops, Blockly

Architecture & Methodology

  • Mvvm, Mvc, Ooa/ood, Tdd, Agile (Scrum), V-model

OS

  • Windows (Client/server), Linux

Databases

  • Ms Sql Server, Mysql, Postgresql, Oracle, Informix, Netezza, Access, Sqlite

Ci/cd & Devops

  • Azure Devops, Docker, Git, Jenkins (Basic)

Languages

German
Native
English
Advanced
Russian
Advanced

Education

Apr 2004 - Mar 2006

FernUniversität Hagen

Master of Science, Computer Science · Computer Science · Hagen, Germany · Very Good

Oct 2000 - Mar 2004

University of Applied Sciences Darmstadt

Bachelor of Science, Computer Science · Computer Science · Darmstadt, Germany · Good

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