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# Full Stack Developer

- **Company:** Venquis
- **Location:** Köln, Germany
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, .NET Framework, Artificial Intelligence, Application Performance Management, C Sharp (Programming Language), Software Quality, Code Review, Entity Framework, Design of User Interfaces, Microsoft SQL Server, Software Architecture, Software Engineering, Transact-SQL, Data Logging, Blazor, Software Security, Integration Tests, Information Technology, Restful APIs
- **Published:** November 5, 2026
- **Apply:** https://www.venquis.com/job/fullstack-developer-30571/

## About the Role

* A degree in Computer Science, Software Engineering or a related field.
 * At least 5 years of professional experience in full-stack development.
 * Strong practical experience with C#/.NET.
 * Experience with Blazor, ideally Blazor Server.
 * Good knowledge of Entity Framework, T-SQL and REST APIs.
 * Experience developing component-based user interfaces and responsive applications.
 * An understanding of application security, software architecture and development best practices.
 * An interest in AI and experience integrating AI into applications, or a willingness to develop in this area.
 * A collaborative mindset with strong communication skills.
 * Business-fluent English; German language skills are an advantage.

## Description

* Develop and maintain modern user interfaces using Blazor Server.
 * Build reusable UI components and ensure consistent design patterns across applications.
 * Implement business logic and security concepts using C#/.NET.
 * Integrate databases and external services, including SQL Server and REST APIs.
 * Develop and maintain application integrations, including AI-powered solutions.
 * Work closely with Product Owners to understand requirements and deliver effective solutions.
 * Conduct code reviews, write unit and integration tests, and maintain code quality.
 * Optimise application performance, error handling and logging.
 * Contribute to the continuous improvement of internal software products.