Marko M.

Are you building a fintech platform, integrating legacy systems, or scaling a .NET backend that needs to handle real load? I can help. I'm a Senior .NET Backend Developer with 4+ years of experience building scalable distributed systems in fintech and enterprise environments. Currently working remotely for a UK-based fintech startup (InvestmentTribe), architecting .NET 8 microservices that handle real-time financial data pipelines with sub-100ms response times on critical endpoints. Previously built the backend for ExamRoom.AI — an AI-powered proctoring platform used by thousands of exam candidates globally, maintaining 80%+ test coverage on core business modules. What I typically help clients with: Building or refactoring .NET microservices (clean architecture, DDD, CQRS) Event-driven systems with RabbitMQ and MassTransit Real-time features with SignalR and WebSockets REST API & gRPC service development with high-performance async patterns SQL Server optimization, stored procedures, AWS Redshift integration JWT, OAuth 2.0, API Key auth implementations XML/SOAP legacy integrations and data pipelines I write clean, testable code and communicate clearly throughout the project. No disappearing acts. Tech: .NET 6/7/8, ASP.NET Core, EF Core, Dapper, gRPC, Docker, GitLab CI/CD, SQL Server, Redis, AWS Redshift