Staff AI Engineer - AI Infrastructure & Agentic Platform

About ShiftKeyShiftKey is a platform that is disrupting the way healthcare facilities find licensed and certified professionals to fill available shifts. Leveraging marketplace dynamics and deep industry knowledge, the company is playing a vital role in mitigating America's healthcare staffing shortages, enabling direct connections between facilities and healthcare professionals. By offering the opportunity to work as much or as little as they choose and putting the power back into the hands of healthcare workers, ShiftKey is bringing more licensed professionals back into the workforce, a solution that is solving a major crisis in healthcare. For more information, visit www.ShiftKey.com.The role ShiftKey is a healthcare workforce marketplace operating in a regulated (HIPAA) environment, and we are building toward being an AI-native company. We are past the experimentation phase but nowhere near done - and that middle stage is exactly why this role exists. The Staff AI Engineer owns ShiftKey's AI infrastructure layer: the organizational knowledge platform, the infrastructure for hosting and operating AI agents in the cloud, and the retrieval layer that powers both internal engineering tools and customer-facing capabilities.A retrieval stack is already in production, serving real workflows today - this is not a from-scratch build. The next layer of the platform is in active development. And the most ambitious parts - richer retrieval over organizational knowledge, agentic infrastructure, the platform API surface, and the cost-governance model that keeps running within budget in a regulated environment - are yours to architect and own. You will not be maintaining someone else's finished platform, and you will not be starting from a blank page. You will inherit serious retrieval foundations and own architecture of everything that comes next. You will have high autonomy and organization-wide influence, partnering directly with the platform team, AI ambassadors across eng