Open to opportunities

Marcus Gustavo Romão

@marcusgustavoromo

I build and operate C#/.NET microservices and financial-platform APIs from design through production incident resolution.

Brazil

Message

What I'm looking for

I'm looking to build and operate production software where I can own services end to end, solve complex backend problems, collaborate with product and UX teams, and continue growing in .NET, cloud, microservices, and financial technology.

At Ativa Investimentos, I build and maintain REST APIs and web applications across a C#/.NET microservices architecture, applying Domain-Driven Design to complex financial business logic. I also built backend flows for a crypto-asset investment platform covering buy, sell, and listing operations.

I own services end to end, from automated testing with Moq and Entity Framework development through Docker-based deployment consistency, production debugging, and incident resolution using Grafana. I implemented WebSocket real-time log streaming so users can follow application processes as they run.

Earlier, I developed Python, Django, Flask, and Vue.js automation tools that improved company efficiency by 90%, and earned a Best Project Award for a web app consolidating company automations. I also bring hands-on cloud experience with Azure App Services, Azure SQL Database, Azure CDN, AWS S3, and containerized workloads.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Software Engineer

Current

Ativa Investimentos S. A.

Jun 2025 - Present (1 year 2 months)

Developed and maintained REST APIs and web applications across a microservices architecture using C#, .NET, and ASP.NET MVC, applying Domain-Driven Design (DDD) principles. Implemented WebSocket-based real-time log streaming and containerized services using Docker.