Open to opportunities

Gustavo Selhorst Marconi

@gustavoselhorstmarco

Message

I build scalable .NET and Angular enterprise systems that improve performance, reliability, and delivery.

Brazil

Message

What I'm looking for

I'm looking to build scalable digital products and enterprise systems where I can own solutions from design through delivery, improve performance and reliability, and apply clean architecture with collaborative teams.

I've built and evolved enterprise systems for Icatu Seguros through Ratto Software, maintaining a release-cycle management platform and delivering new features and fixes that support stable, continuous operations.

I also developed an internal Swagger specification-control project that automates enriched technical documentation and streamlines API integration across teams. My work uses C#, .NET 9, Angular, TypeScript, SQL Server, Azure DevOps, clean code, and software architecture practices.

At Stage Consulting, I delivered end-to-end web systems with Angular and .NET, using React and NestJS where needed. I optimized critical .NET routines with parallelism and concurrency, reducing processing time by 70%.

Previously at Agili Software Brasil, I maintained public-sector corporate systems, built bank remittance-file processing, and optimized SQL Server queries and reports from minutes to seconds, achieving gains of up to 90%. I also develop personal projects with C# and Unity.

Experience

Work history, roles, and key accomplishments

Current

Mid Level .NET Developer

Current

Ratto Software

Jan 2026 - Present (8 months)

Maintained and evolved an internal release-cycle management system, delivering new features and bug fixes. Implemented and expanded unit test coverage, increasing system reliability and reducing regressions in production.