Senior Software Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer based in Brazil. This role offers the opportunity to build production systems that support advanced AI research, evaluation, and software engineering workflows. You will work at the intersection of engineering and research, developing the infrastructure used to create, validate, evaluate, and reproduce high-signal datasets. The position spans backend services, data pipelines, internal interfaces, agentic workflows, sandboxed execution environments, and evaluation systems. You will own systems end-to-end, from architecture and implementation through deployment, production operations, and reliability improvements. A strong emphasis on correctness and reproducibility means your work directly influences the quality of AI training and evaluation processes. You will collaborate closely with researchers, domain experts, and technical teams while solving complex problems involving both deterministic and non-deterministic systems.