This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Engineer, Data and AI based in United States. This is a senior technical leadership role focused on building and scaling the data and AI infrastructure that powers high-impact products, experimentation, personalization, and trusted decision-making. You will help translate strategic business and product opportunities into scalable data and AI solutions, from early exploration through production. The role combines hands-on engineering with architecture, technical leadership, and cross-functional collaboration. You’ll design reliable batch and real-time data systems while improving platform scalability, observability, security, and cost efficiency. You’ll also help advance modern AI capabilities, including LLM infrastructure, vector retrieval, evaluation, and agentic workflows. As a Staff-level engineer, you’ll raise engineering standards through mentorship, design leadership, and influence across teams.