Sammy Lastre Silveira

C# | .NET Core | ASP.NET Core | Azure

• Designed and built backend services using C#, .NET Core and ASP.NET Core for high-volume microservices and modular monolith applications.
• Created APIs and connections between internal core systems and external partner platforms on Azure.
• Applied Clean Architecture, Vertical Slices and CQRS patterns to keep codebases modular and maintainable.
• Integrated Azure AI/ML services and improved visibility with structured logging, health checks and monitoring dashboards.
• Participated in code reviews and technical discussions while ensuring quality through automated testing with xUnit.

Modernization | Integrations | SQL optimization

• Worked on a debt collection platform for a multinational client.
• Led modernization of legacy applications to .NET Core, focusing on better performance and cleaner APIs.
• Developed and optimized integrations between internal tools and external systems.
• Improved heavy SQL Server queries and stored procedures to handle large data volumes more efficiently.
• Worked closely with QA and stakeholders in an Agile setup to deliver stable features.

Data pipelines | Enterprise delivery

• Worked with a utilities-sector client on backend automation projects.
• Built data processing pipelines using C#, SSIS and SQL Server.
• Designed and tuned complex T-SQL queries for high-volume batch jobs and reporting.
• Supported integrations with multiple internal and external platforms in a production environment.