I am a Senior .NET Architect and Technical Lead with 14+ years of hands-on experience designing, building, and modernising complex, scalable back-end and full-stack systems.

My expertise includes .NET 8 / ASP.NET Core, Clean Architecture, microservices, high-performance APIs, Entity Framework Core, RabbitMQ, Redis, and cloud-native deployments (OpenShift / Kubernetes). I have delivered production trading systems at Bitcoin Suisse AG and led large-scale microservices migrations from legacy WCF to modern .NET 8 at Cognizant.

I combine deep architectural knowledge with an advanced AI-augmented development workflow (primarily Claude 4.6 Opus and ChatGPT 5.3 Codex). This allows me to move extremely fast while maintaining clean, maintainable, production-grade code and full ownership of the solution.

Services I offer:
End-to-end architecture and technical leadership for complex .NET web and backend applications
Microservices design and implementation (event-driven systems, distributed locking, reliable messaging)
Modernisation and upgrade of existing .NET codebases
High-quality, scalable API development and system integration
Clean Architecture, SOLID, DDD, and performance-focused solutions

I am currently available for remote freelance/contract work (ideally 25–30 hours per week on long-term or milestone-based projects). I work independently, communicate clearly, and focus on delivering reliable systems that scale and are easy to maintain.

You can see examples of my architectural work and production code here:
• Professional GitHub → https://github.com/aaroncpina
• Personal site & portfolio → https://www.aaronpina.com

Let me know how I can help bring your project to the next level.