Leandro Siqueira

Leandro Siqueira

Senior Software Engineer · 10+ Years | Data Annotation - LLM Evaluation Specialist

Senior Software Engineer specializing in LLM evaluation and AI code generation quality assessment, backed by 10+ years of production engineering across backend systems, cloud infrastructure, and CI/CD automation.

Currently designing evaluation frameworks across multiple assessment platforms, having built 130+ evaluation tasks, scoring rubrics, and golden reference implementations that benchmark AI coding agents against production-grade repositories in Python, C++, Java, and Go, identifying systematic reasoning failures that directly inform model improvement.

Deep production engineering background provides the technical foundation for credible code quality assessment, including performance optimization (55% response time improvement on a 10k+ daily transaction CRM), legacy system modernization (.NET to ASP.NET Core), and training 200+ professionals in AWS and cloud infrastructure.