Christian Horder
Software Architect | Software Developer | .NET Expert
Over 25 years of experience developing sustainable software solutions for enterprise environments
Get in TouchAbout Me
Experienced Software Architect focused on modern .NET technologies
As an experienced Software Architect with over 25 years of professional experience, I support companies in designing and implementing modern software solutions. My focus is on transforming legacy systems into future-proof architectures and developing scalable enterprise applications.
I accompany the entire software lifecycle - from requirements analysis through architecture design to implementation and deployment. I rely on modern technologies such as cloud-native architectures, containerization, and AI-assisted development. My goal is to develop maintainable, testable, and scalable software that creates long-term value.
Strengths
- Analytical Thinking & Problem Solving
- Quality Awareness & Clean Code
- Team Leadership & Mentoring
- Continuous Learning
- Technical Communication
Focus Areas
- Cloud-native Architectures
- Legacy Modernization
- API Design & Microservices
- DevOps & CI/CD
- AI Integration
Education
- M.Sc. Computer ScienceFernUniversität Hagen
- Dipl.-Informatiker (FH)Hochschule Karlsruhe
Languages
- GermanNative
- EnglishFluent
Services
Professional support for your software project
Architecture Consulting
Support with technical conception, system design and modernization strategy
- Analysis of existing architectures
- Cloud-native & microservice design
- Legacy modernization
- API design
- Technology consulting
Development & Coding
Reliable implementation as an experienced .NET developer – features, bugfixing, outsourcing
- .NET/C# feature development
- Bugfixing
- REST APIs & Microservices
- Third-party system integration
- CI/CD pipelines
AI Integration & Consulting
Consulting and implementation for integrating AI and large language models into existing systems
- LLM integration into existing applications
- RAG architectures & knowledge management
- Prompt engineering & AI workflows
- Feasibility analysis & prototyping
- Agentic AI & automation
Code Reviews
Review against quality standards, best practices and architecture principles with structured feedback
- Clean Code & SOLID
- Security & Performance
- Test coverage
- Architecture reviews
Skills
Technical expertise for modern software development
Backend & .NET
Frontend & Web
Cloud & DevOps
Architecture & Patterns
Databases & Messaging
AI & Modern Tools
Testing & Quality
Methods & Tools
Industry Experience
Versatile expertise across different industry sectors
Projects
Selected projects from my professional career
Online Art Shop Sabine Tuerk
- Complete e-commerce platform for original artworks and commissioned paintings with gallery, wishlist and shopping cart functionality
- Clean Architecture backend with REST API, automatic image optimization and variant management for different art formats
- Responsive Next.js frontend with Tailwind CSS, SEO optimization and fast loading times
- Docker-based deployment with Nginx reverse proxy, SSL certificate and automated backups
Enterprise Architecture Modernization
- Transformation of monolithic legacy applications to modern microservice architectures at an international automotive supplier
- Building a global CI/CD process with Azure DevOps, containerized deployment with Docker
- Introduction of Domain-Driven Design and Event-Driven Architecture for loose coupling between services
- Mentoring the development team in adopting modern development practices
Jira & Tempo Timesheets Synchronization
- Development of a background service for automatic synchronization of time tracking data between Jira and Tempo Timesheets
- REST API integration with token authentication for secure communication with Atlassian platforms
- Bidirectional data synchronization of worklogs, working hours and project bookings
- Robust error handling with logging and retry mechanisms for reliable continuous operation
Regional Rental Platform
- Development of a neighborhood platform for rentals and services with booking system and calendar integration
- JWT authentication with email verification, AI-powered offer descriptions (OpenAI GPT)
- Payment integration with automated payout system for providers
SmartHospital - Medical Letter Management
- Development of a FHIR-compliant hospital information system for creating and managing medical documents (physician letters, discharge letters)
- Clean Architecture with CQRS pattern (MediatR), Repository pattern and 16 specialized projects for maximum maintainability
- PDF/HTML document generation with template system, JWT authentication and role-based access control (RBAC)
Nightclub & Hospitality Management
- Development of comprehensive business software for nightclubs and hospitality businesses with modular design
- Backend development with ASP.NET Core and REST API, Content Management System for website administration
- Modules for communication (SMS, newsletter, social media), staff scheduling and booking system
- Branding and deployment of native mobile apps for iOS and Android
Financial Portal Platform
- Leading a development team (5-7 members) implementing financial portals for national and international clients
- Development of secure transaction systems with high data protection and compliance requirements
- Integration of real-time market data and reporting functions for portfolio analysis
- Performance optimization for high user volumes and complex database queries
Production Planning System
- Design and implementation of an enterprise planning application with scalable multi-tier architecture based on WCF
- Development of backend services and frontend components for production planning
- Rollout management for intermediate versions to customer environment including deployment and testing
- Oracle database integration with optimized queries for large data volumes
Energy Trading Portal
- Design and development of portal solutions based on CMS
- Requirements engineering and interface specification
Telematics & Passenger Information
- Product ownership for telematics software
- Project management for national and international rollouts
Contact
Let's talk about your next project
Get in Touch
Do you have a project or challenge where I can support you? I look forward to hearing from you.