Senior .NET Backend Engineer, C#, Domain Modeling, AI

• Serve as the technical anchor for one of our customer projects
• Take responsibility for the architecture and implementation of data-intensive, technically complex applications in the .NET environment, with full-stack components in Type Script/React and an expanding AI component
• Work closely with Product Owners, Data Scientists, and subject-matter experts
• Support team growth through pair programming and code reviews
• Ensure clean, testable, and maintainable software
• Design and implement sophisticated backend and full-stack solutions in C# / .NET
• Model complex business rules and data structures-from requirements through to production
• Integrate AI models (LLMs, classifiers, recommendation systems) into existing and new applications
• Build and operate data and rules pipelines, including database design
• Take responsibility for testing, CI/CD, and code quality
• Help shape technical decisions across projects and customer organizations
• Work as part of the customer team, collaborate with business departments, and represent technical decisions

• At least 5-10 years of professional software development experience
• Strong .NET / C# expertise at production level
• Experience in software architecture and domain modeling of complex business logic
• Practical experience with relational databases (MS SQL, Oracle, or PostgreSQL) and data-intensive applications
• Proficiency with cloud technologies (ideally Azure), Docker, Kubernetes, Git, and modern CI/CD pipelines
• Interest in and initial experience integrating AI / LLMs into production software
• Independent, structured working style and enthusiasm for pair programming and code reviews
• Fluent or business-fluent German
• Fluent or business-fluent English
• Strong communication skills and confidence in direct customer interactions
• Willingness to work on-site at the customer occasionally (e.g., in North Rhine-Westphalia)

Demonstrates extensive expertise in .NET and C# for developing data-intensive applications, with a strong focus on software architecture, integration of AI models, and collaboration with cross-functional teams. Proficient in implementing CI/CD practices and ensuring code quality while fostering team growth through pair programming and code reviews.

• Expertise In .NET / C#
• Software Architecture
• AI Integration
• CI/CD Implementation
• Relational Database Experience

• .NET
• C#
• Type Script
• React
• Relational Databases
• AI Models
• Cloud Technologies
• Docker
• Kubernetes
• CI/CD

• Strong Communication Skills
• Enthusiasm For Pair Programming
• Structured Working Style

• Data-Intensive Applications
• Business Logic Modeling
• Technical Decisions
• Customer Interaction

• Azure
• Git
• MS SQL
• Oracle
• PostgreSQL