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 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 and 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 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 and 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 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 have an inclusive culture that provides comprehensive benefits which vary by the U.S. benefits may include health and wellness programs (including medical dental vision life and disability insurance) fitness centers 401(k) company match family support benefits equity awards annual bonuses paid time off and paid leaves (e.g. military and parental leave) for eligible employees at all levels! For additional information about Regeneron benefits in the US please visit For other countries specific benefits please speak to your recruiter.
Please be advised that at Regeneron we believe we are most successful and work best when we are together. For that reason many of Regenerons roles are required to be performed on-site. Please speak with your recruiter and hiring manager for more information about Regenerons on-site policy and expectations for your role and your location.

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 nationality national or ethnic origin civil status age citizenship status membership of the Traveler community sexual orientation disability genetic information familial status marital or registered civil partnership status pregnancy or parental status gender identity gender reassignment military or veteran status or any other protected characteristic in accordance with applicable laws and regulations. The Company will also provide reasonable accommodation to the known disabilities or chronic illnesses of an otherwise qualified applicant for employment unless the accommodation would impose undue hardship on the operation of the Companys business.

For roles in which the hired candidate will be working in the U.S. the salary ranges provided are shown in accordance with U.S. law and apply to U.S.-based positions. For roles which will be based in Japan and/or Canada the salary ranges are shown in accordance with the applicable local law and currency. If you are outside the U.S Japan or Canada please speak with your recruiter about salaries and benefits in your location.

Please note that certain background checks will form part of the recruitment process. Background checks will be conducted in accordance with the law of the country where the position is based including the type of background checks conducted. The purpose of carrying out such checks is for Regeneron to verify certain information regarding a candidate prior to the commencement of employment such as identity right to work educational qualifications etc.