Senior Software Developer – C# / .NET (m/f/x)

Location: Kassel, Hessen (Hybrid – 1 day on-site per week)

Salary: €60,000 – €75,000

Language Requirement: German (C1 minimum)

About the Company

Our client is a recognised leader in automation and security technology, developing cutting-edge software and hardware systems for industrial and commercial environments. Their solutions enable smarter, safer, and more efficient operations across modern infrastructures. The company fosters a culture of collaboration, technical excellence, and continuous innovation.

Your Responsibilities

• Design, architect, and implement new software features.
• Refactor and optimise existing codebases for scalability and maintainability.
• Develop and integrate new device interfaces.
• Conduct code reviews and uphold best practices within the team.
• Participate in internal guilds (architecture, QA, DevOps, documentation, and product).
• Analyse and resolve software issues, ensuring reliability and high performance.

Your Profile

• Degree in Computer Science or a related IT field.
• Strong professional experience with C# / .NET (version 8.0).
• Solid understanding of WPF and/or ASP.NET frameworks.
• Strong sense of ownership, quality, and attention to detail.
• Excellent communication skills in German (C1 minimum) and good English proficiency.

Why Apply

• Join a forward-thinking tech company leading digital transformation in automation and security.
• Work in a flexible hybrid setup with just one on-site day per week.
• Be part of a collaborative team that values innovation, quality, and professional growth.

If you’re an experienced .NET developer looking for a technically challenging role with real impact, we’d like to hear from you.