Senior Specialist, Software Engineering- Full-Stack, GenAI and Agentic AI

· Develop and maintain complex full-stack applications and software configurations in collaboration with global cross-functional teams.

· Develop responsive, accessible user interfaces using modern web technologies such as React, Angular, HTML, CSS, JavaScript, and TypeScript.

· Design and implement secure APIs, microservices, and backend services using Python, Node.js, Java, .NET, or equivalent technologies.

· Build GenAI-enabled applications leveraging LLMs, prompt engineering, semantic search, AI agents, enterprise knowledge sources, and orchestration frameworks

· Design, develop, and optimize Retrieval-Augmented Generation (RAG) pipelines including ingestion, chunking, embeddings, retrieval, reranking, grounding, and evaluation.

· Develop agentic workflows using reasoning, planning, tool calling, workflow orchestration, memory patterns, and human-in-the-loop interactions.

· Integrate AI services with enterprise applications, APIs, authentication systems, knowledge repositories, and business workflows.

· Work with structured and unstructured data using relational databases, vector databases, search platforms, and cloud-native data services.

· Design and execute automated and manual testing strategies covering application functionality, integrations, APIs, and AI solution quality.

· Build, deploy, monitor, and support applications on AWS/GCP/Azure using cloud-native engineering practices.

· Contribute to AI evaluation, monitoring, prompt management, model performance measurement, and continuous improvement of production AI systems.

· Apply secure software engineering principles including authentication, authorization, API security, encryption, secrets management, and data protection.

· Lead Agile product delivery, sprint planning, solution design discussions, and continuous improvement activities within a matrixed global organization.

Regularly mentor colleagues, provide help with complex technical problems, defining engineering standards, and identifying reusable code and modules.

Contribute to the development of solution architectures in business, infrastructure, or functional areas.

Identify and evaluate alternative architectures and the trade-offs in cost, performance and scalability.

Partner with global cross-functional teams to plan, execute and release in an Agile setup and deliver within matrix organization.

· Bachelors’ degree in Information Technology, Computer Science, or related field

· 7-11 years of hands-on experience working in full-stack development

Experience building cloud-native applications and deploying solutions into production environments.

Passion for technology innovation, AI-enabled engineering, and continuous learning.

We are known as Merck & Co., Inc., Rahway, New Jersey, USA in the United States and Canada and MSD everywhere else. For more than a century, we have been bringing forward medicines and vaccines for many of the world's most challenging diseases. Today, our company continues to be at the forefront of research to deliver innovative health solutions and advance the prevention and treatment of diseases that threaten people and animals around the world.

Search Firm Representatives Please Read Carefully Merck & Co., Inc., Rahway, NJ, USA, also known as Merck Sharp & Dohme LLC, Rahway, NJ, USA, does not accept unsolicited assistance from search firms for employment opportunities. All CVs / resumes submitted by search firms to any employee at our company without a valid written search agreement in place for this position will be deemed the sole property of our company. No fee will be paid in the event a candidate is hired by our company as a result of an agency referral where no pre-existing agreement is in place. Where agency agreements are in place, introductions are position specific. Please, no phone calls or emails.

*A job posting is effective until 11:59:59PM on the day BEFORE the listed job posting end date. Please ensure you apply to a job posting no later than the day BEFORE the job posting end date.