Sr. GenAI Engineer (3-6 month contract)

Care Lumen | Remote (US Only) Employment Type: Contractor (3-6 months, with possibility of extension) Salary Range: $129 to $150 an hour Scope The Senior Generative AI Engineer is an individual contributor responsible for testing, evaluating, optimizing, and monitoring enterprise Generative AI systems. The primary focus is improving the quality, reliability, and performance of existing GenAI solutions through systematic testing, evaluation of new model versions, prompt optimization, and application architecture improvements. The role will also help drive evaluation methodology, monitoring capabilities, and AI governance requirements for selected initiatives. Approximately 25% of the role is expected to support AI governance activities, including model documentation, versioning, registry management, experiment tracking, auditability, and related controls. The role collaborates with engineering, data science, architecture, security, compliance, governance, and business stakeholders. It does not have direct reports or a formal leadership mandate. What You’ll Do Test and evaluate GenAI applications, AI agents, and LLM-powered workflows for quality, reliability, accuracy, safety, and task effectiveness. Develop and execute repeatable GenAI evaluation methodologies, test datasets, benchmark suites, regression tests, and automated evaluation pipelines. Use DeepEval and related evaluation approaches to measure GenAI output quality and identify regressions across prompts, workflows, a