▸Designed and built a scalable Banking-as-a-Service (BaaS) distributed system compliant with Open Banking standards (PSD2), serving multiple fintech partners via modular, token-secured APIs. ▸Developed backend modules in C# / ASP.NET Core covering account management, transactions, card services, and customer authentication — with clean, tested, documented code. ▸Architected event-driven communication between services using RabbitMQ; implemented real-time observability with Elastic Stack and Prometheus / Grafana. ▸Built and maintained CI/CD pipelines (Docker, Kubernetes, GitHub Actions) enablin