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Alysson Dornelles

@alyssondornelles

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Backend .NET/C# developer at Olympus IT building APIs that connect Microsoft Dynamics ERP with business systems.

Brazil

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What I'm looking for

I’m looking to work as a Backend .NET/C# Developer, building scalable, maintainable APIs with Clean Architecture, DDD, and CQRS, and delivering value autonomously and consistently.

At Olympus IT, I develop Microsoft Dynamics AX 2012 and Dynamics 365 F&O features and business rules, and build .NET/C# APIs that integrate the ERP with legacy systems, partner platforms, and cloud services.

Previously, at SIL Sistemas, I developed and maintained REST APIs in C# and .NET 10. I applied DDD, CQRS, and Clean Architecture, using MediatR, FluentValidation, Dapper, and PostgreSQL.

At Lojas Colombo, I customized Microsoft Dynamics AX 2012 with X++ for retail operations and developed C#/.NET Windows Forms applications. I also maintained SQL and PL/SQL routines and refactored legacy code.

My work has covered development and production support across retail, industry, software, and ERP consulting. I’m looking to build scalable, maintainable .NET/C# APIs using Clean Architecture, DDD, and CQRS, delivering value autonomously and consistently.

Experience

Work history, roles, and key accomplishments

Current

Engenheiro de Software

Current

Olympus IT

Aug 2026 - Present (3 months)

Developed new features, modules, and business rules in the Microsoft Dynamics AX 2012 and Dynamics 365 F&O ERP ecosystem. Diagnosed and resolved complex failures, operational bugs, and incidents, and developed .NET/C# APIs integrating the ERP with legacy systems and cloud services.

C#.NET Microsoft Dynamics AX Dynamics 365 F&O SQL Server REST APIs Cloud Services

Desenvolvedor de Software (Backend)

SIL Sistemas

Jan 2026 - Jun 2026 (5 months)

Developed and maintained REST APIs in C# and .NET 10, applying DDD, CQRS, and Clean Architecture. Orchestrated use cases with MediatR, validated input with FluentValidation, and accessed data with Dapper and PostgreSQL, participating in CI/CD pipelines.

C#.NET 10 REST APIs DDD CQRS Clean Architecture MediatR Fluent Validation Dapper PostgreSQL CI CD

Desenvolvedor Freelancer

Autônomo

May 2025 - Jan 2026 (8 months)

Developed and maintained websites, web and desktop applications in C#/.NET, ASP.NET MVC, and Entity Framework with PostgreSQL. Customized Microsoft Dynamics AX 2012 with X++ and worked on PHP projects with CodeIgniter, using agile methodologies.

C#.NET ASP.NET MVC Entity Framework PostgreSQL PHP CodeIgniter Scrum Kanban

Analista de Sistemas

Tondo S/A

Oct 2024 - Mar 2025 (5 months)

Developed processes and forms on the TOTVS Fluig platform using HTML, JavaScript, and Java. Provided support for the TOTVS Datasul ERP, created technical documentation, and administered the ControlID access control system.

Fluig HTML JavaScript Java Totvs Datasul Technical Documentation ControlID

Programador de Sistemas

Lojas Colombo S/A

Jul 2022 - Mar 2024 (1 year 8 months)

Developed customizations in Microsoft Dynamics AX 2012 with X++ for retail operations. Developed applications in C#/.NET with Windows Forms, built and maintained SQL and PL/SQL routines, and refactored legacy code.

Microsoft Dynamics AX C#.NET Windows Forms SQL Pl SQL Legacy Code Refactoring

Atendente de Service Desk

Lojas Colombo S/A

Feb 2021 - Jul 2022 (1 year 5 months)

Provided N1/N2 support to Dynamics AX users via phone, email, chat, and WhatsApp, including physical stores and distribution center. Analyzed and diagnosed system issues, managed users and permissions, and supported network and server incidents.

Service Desk Dynamics AX User Support Incident Management Network Support