Sr. AI Engineer

Regeneron is founded on the belief that the right idea, combined with the right team, can lead to significant transformations. Our growing global network is dedicated to inventing, developing, and commercializing medicines that change lives for those with serious diseases. In doing so, we are pioneering innovative approaches to science, manufacturing, and commercialization, as well as redefining our understanding of health. We are seeking a Senior AI Engineer with deep AI expertise to join our AI & ML Engineering team. This role spans the full development stack from designing intuitive, responsive front-end experiences to building robust, scalable backend services and data pipelines that power enterprise AI solutions. You will work on advanced projects involving LLM integration, RAG-based architectures, and cloud-native deployments, delivering end-to-end AI-driven products that are performant, reliable, and production-ready.

A Typical Day Might Include The Following

• Build responsive, modern web interfaces using Next.js and React.js, including server-side rendering, static generation, and micro front-end architecture. Translate AI-driven data and insights into intuitive user experiences and interactive dashboards.
• Design, develop, and maintain microservices using Python and Fast API for AI and ML workflows, ensuring scalability, security, and enterprise-grade reliability.
• Integrate LLM capabilities (OpenAI, Anthropic, Google) directly into full-stack features, enabling conversational interfaces, intelligent search, and AI-assisted workflows.
• Build and optimize data ingestion pipelines for structured and unstructured data sources to power AI models and analytics.
• Create secure, high-performance RESTful APIs that bridge front-end experiences with backend AI/ML services and internal LLM access layers.
• Implement Retrieval-Augmented Generation workflows and manage vector databases (Milvus) to power intelligent, context-aware applications.
• Deploy and manage full-stack services in AWS EKS Kubernetes clusters, ensuring scalability, resilience, and uptime.
• Deploy and manage full-stack services in AWS EKS Kubernetes clusters, ensuring scalability, resilience, and uptime.
• Partner closely with ML engineers, data scientists, UX designers, and business stakeholders to deliver cohesive, AI-powered product experiences.

This Job Might Be For You If You

• Possess a Bachelors or Masters degree in Computer Science, Software Engineering, or a related field.
• 5+ years of relevant experience in building AI-powered UI components using Next.js/React.js such as chat interfaces, semantic search, and real-time AI output streaming.
• Advanced proficiency in Python (Fast API) for backend microservice development.
• Strong proficiency in Next.js and React.js for building dynamic, responsive front-end interfaces, including SSR, SSG, and micro front-end architectures.
• Deep understanding of RESTful API design, microservices architecture, and full-stack integration patterns.
• Experience with Kubernetes, AWS EKS, and containerized full-stack deployments.
• Hands-on experience with LLM integration (OpenAI, Anthropic, Google) and prompt engineering.
• Familiarity with vector databases (Milvus) and RAG-based architectures.
• Solid understanding of SQL and data pipeline engineering for AI workflows.
• Jenkins, Bitbucket, Atlassian suite (Jira, Confluence).
• Familiarity with image processing workflows and SQL data integration.
• Knowledge of pharmaceutical industry standards and compliance practices.
• Experience with Next.js App Router, state management libraries (Redux, Zustand), and modern front-end tooling.
• Background in UX/design principles for enterprise AI product interfaces. Does this sound like you? Apply now to take your first step towards living the Regeneron Way! We are committed to building a workplace with an inclusive culture. Regeneron is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion or belief (or lack thereof), sex, sexual orientation, gender identity or expression, gender reassignment, marital or civil partnership status, civil status, pregnancy or parental status, age, disability, nationality, citizenship status, ethnic or national origin, membership of the Traveler community, familial status, genetic information, military or veteran status, or any other characteristic protected under applicable law. Where required, we will provide reasonable accommodation to applicants with known disabilities or chronic illnesses during the recruitment process, unless such accommodation would impose undue hardship. Where necessary, we disclose salary ranges for roles in all countries in which we operate. The final offer will be determined within the relevant range based on the country of employment, specific role level, and your skills and experience. In some countries, collective bargaining agreements (CBAs) may apply and influence certain elements of pay or benefits. Regeneron offers a competitive and comprehensive total rewards package which may include, depending on country and role: annual bonuses or other incentive plans, equity awards, pension or retirement benefits, 401(k) company match, health and wellness programs, fitness centers, insurance benefits (e.g. medical, dental, vision, life and disability), paid time off, and family support benefits. For additional information about Regeneron benefits in the U.S., please visit https://careers.regeneron.com/en/working\-at\-regeneron/total\-rewards/. For other locations, additional information will be provided during the recruitment process. If you have any questions, please speak with your recruiter. Please be advised that at Regeneron, we believe we do our best work when we are together. For that reason, many roles are required to be performed onsite. Please speak with your recruiter and hiring manager for more information about onsite expectations for your role and location. As part of the recruitment process, certain background checks may be conducted in accordance with the laws of the country where the position is based. The purpose of such checks is to verify certain information prior to the commencement of employment such as identity, right to work and educational qualifications. For jobs in Canada: this posting is for an existing position.