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 Bachelor’s or Master’s 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 have an inclusive culture that provides comprehensive benefits, which vary by location.  In 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 https://careers.regeneron.com/en/working-at-regeneron/total-rewards/.  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 Regeneron’s roles are required to be performed on-site. Please speak with your recruiter and hiring manager for more information about Regeneron’s 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 Company's 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.