Principal AI Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal AI Engineer based in Brazil. This role leads the architecture and development of enterprise-scale AI orchestration and retrieval systems. You will define how LLMs connect with tools, data sources, APIs, and specialized agents. The position combines strategic technical leadership with hands-on engineering across agentic workflows and RAG systems. You will establish standards for MCP servers, tool exposure, retrieval, context management, evaluation, and observability. Working across teams, you will create reusable abstraction layers that enable product engineers to build effectively on top of AI capabilities. This is an opportunity to shape the technical foundations of a central AI platform while mentoring engineers and driving best practices.