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# Principal Software Engineer C#/.NET

- **Company:** SThree GmbH
- **Location:** Paderborn, Germany
- **Salary:** €70,000.0 - €90,000.0
- **Contract:** Temporary to permanent
- **Skills:** ASP.NET, .NET Framework, Artificial Intelligence, Microsoft Azure, C Sharp (Programming Language), Software Quality, Continuous Integration, Entity Framework, Software Architecture, Azure DevOps Pipelines, Standard Sql, SonarQube, Strategies of Testing, UML, .NET Core, Git, Domain Driven Development, Microservices
- **Published:** September 19, 2026
- **Apply:** https://www.adzuna.de/details/5890042842

## About the Role

* Mehrjährige Erfahrung als Software Architect, Principal Engineer, Technical Lead oder Lead Developer
 * Sehr gute Kenntnisse in C#, .NET/.NET Core und ASP.NET
 * Erfahrung mit Microservices und Enterprise-Architekturen
 * Know-how in Azure DevOps, Git, CI/CD und SonarQube
 * Erfahrung mit Entity Framework und SQL
 * Fundierte Kenntnisse in DDD, UML und Requirements Engineering
 * Erfahrung in der fachlichen Führung von Teams
 * Deutsch und Englisch auf C1-Niveau oder höher

Wünschenswert

 * Erfahrung im Defence- oder Security-Umfeld
 * Kenntnisse sicherheitskritischer Systeme
 * Erfahrung in behördlichen oder militärischen Projekten
 * GitOps-Kenntnisse
 * Erfahrung mit AI-gestützten Entwicklungstools

## Description

* Konzeption und Weiterentwicklung komplexer Softwarearchitekturen
 * Entwicklung moderner Anwendungen auf Basis von C#/.NET
 * Design und Implementierung von Microservice-Architekturen
 * Durchführung technischer Reviews und Architekturworkshops
 * Analyse und Umsetzung komplexer Kundenanforderungen
 * Fachliche Steuerung von Entwicklungsteams
 * Optimierung von Entwicklungsprozessen und Qualitätsstandards
 * Aufbau und Weiterentwicklung von Azure DevOps CI/CD-Pipelines
 * Verantwortung für Softwarequalität und Teststrategien
 * Evaluierung neuer Technologien und KI-gestützter Entwicklungsmethoden


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