.NET Developer

About The Company

Founded in 1998, QualityHosting AG specializes in Microsoft technologies for business-critical IT applications. As a Microsoft Cloud Solution Provider and Germany’s market leader in Hosted Exchange, we support organizations with a broad portfolio of cloud services, including Microsoft 365, Copilot and AI solutions, and high-performance cloud servers. Our customers use our platform to manage Microsoft cloud services through self-service, from provisioning to billing.

We work with current technologies such as .NET, C#, Blazor, and Microsoft Azure. At QualityHosting, you will contribute to an established cloud business while helping shape how software development teams collaborate with AI agents.

About The Role

We are looking for a Senior .NET Developer (m/f/d) to combine hands-on software development with technical planning and coordination. You will spend approximately 50 to 70 percent of your time building sophisticated features for our cloud platform. Alongside your development work, you will translate product and business needs into clear technical concepts and manageable work packages for both colleagues and Claude Code agents.

This role is suited to an experienced developer who enjoys making sound technical decisions, improving engineering practices, and ensuring that AI-assisted work delivers reliable, maintainable results. You will help coordinate implementation, keep priorities visible, and support the team through delivery and releases.

Qualifications

You have at least five years of professional software development experience with C# and .NET, and a strong commitment to producing high-quality software. You have practical experience with agentic software development, including preparing requirements and tasks for AI agents and reviewing, testing, and verifying their output. You are comfortable working in agile environments, prioritizing work, and managing communication with stakeholders.

You combine a pragmatic approach to solving problems with the judgment to recognize when a deeper technical solution is required. Very good German and English skills are required.

Experience with Microsoft Azure, cloud-native architecture, SaaS, self-service, or multi-tenant platforms is an advantage. Familiarity with Microsoft 365, Entra ID, or the Cloud Solution Provider ecosystem is also welcome. Additional experience with CI/CD, GitHub Actions, Azure DevOps, Claude Skills, MCP servers, or comparable AI automation tools would be beneficial.

Responsibilities

Develop and maintain complex features for our cloud platform using modern .NET technologies. Analyze requirements and turn them into actionable technical concepts, appropriately sized work packages, and clear priorities for the team and AI agents. Advance our approach to Claude Code, Claude Skills, and agentic software development by identifying effective ways to integrate these capabilities into everyday engineering work.

Maintain technical quality through code reviews, automated and manual testing, and careful verification of implementation results. Coordinate development activities and provide transparency around priorities, progress, dependencies, and releases. Collaborate with colleagues and stakeholders to clarify requirements, resolve technical questions, and deliver dependable improvements for customers.

Benefits

We offer a permanent position with an established cloud services provider and a hybrid working arrangement, typically combining two days of home office with three days in the office. Choose between our quiet Gelnhausen location, which offers free parking, and our modern Frankfurt office, where we cover the JobTicket.

You will receive an annual professional development budget of €2,000 for certifications, conferences, books, or coaching, as well as complimentary language courses. Our benefits include a company pension plan with doubled employer contributions, a bonus system, partner discounts, and an annual €400 budget for the QualityHosting merchandise shop. We value flat hierarchies, agile working, a welcoming team, and flexibility to support family and professional commitments.

Regular team events and summer BBQs offer opportunities to connect.

Equal Opportunity

QualityHosting AG welcomes applicants from all backgrounds. We are committed to a respectful and inclusive workplace and consider candidates based on their skills, experience, and potential. We encourage qualified applicants to apply and look forward to learning how you could contribute to our team.