Sr Associate, AI Engineer

Summary
We are looking for an AI Engineer / Applied AI Scientist to help design, build, and deploy enterprise-scale Generative AI solutions that accelerate scientific, regulatory, and business processes.
You will build intelligent applications powered by large language models (LLMs), retrieval systems, knowledge graphs, agentic workflows, and advanced analytics. You will work closely with data scientists, statisticians, software engineers, domain experts, and business stakeholders to transform complex scientific and operational data into practical, production-ready AI solutions.
As part of the R&D organization, the team also contributes to applied research, providing opportunities to contribute to scientific publications and conference presentations.
Key Responsibilities

• Design, develop, and deploy Generative AI applications using modern LLM frameworks and technologies.
• Build retrieval-augmented generation (RAG) pipelines for enterprise knowledge retrieval.
• Develop agentic workflows for document processing, scientific applications, and research support.
• Integrate AI services and third-party APIs into enterprise platforms and production-ready applications.
• Build reliable, maintainable Python applications and services around AI capabilities.
• Experiment with AI-assisted software development tools, such as GitHub Copilot, Claude Code, Cursor, GitHub, and internal Pfizer tools, to accelerate application development.
• Evaluate emerging AI models, tools, and frameworks and assess their applicability to real-world use cases.
• Contribute to applied research projects, including scientific publications and conference submissions.
• Collaborate with technical and non-technical stakeholders to translate business and scientific needs into effective AI solutions.

Required Qualifications

• Bachelor's or Master's degree in Computer Science, Data Science, Statistics, Machine Learning, or a related quantitative or technical field.
• Relevant industry, academic, or research experience in software development, machine learning, data science, or AI (e.g., BSc with ~3 years of experience or MSc with ~1 year).
• Programming in Python.
• Working knowledge of core Generative AI concepts and architectures, including LLMs, RAG, and AI agents.
• Ability to independently develop and iterate on technical prototypes and turn ideas into working solutions.
• Strong communication and collaboration skills.

Preferred Qualifications
Experience with some of the following:

• REST API design and integration.
• React or other modern front-end frameworks.
• Vector & SQL databases.
• Git and GitHub development workflows.
• Linux environments.
• AWS or another major cloud platform.
• LLM evaluation, observability, or testing.
• Docker and containerized applications.
• Scientific, healthcare, pharmaceutical, or other regulated environments.

What We Value

• Accountability - You take ownership of your work and, with appropriate support and context, can turn ideas into working prototypes and solutions.
• Adaptability - Generative AI is evolving quickly. You're comfortable learning new concepts, tools, models, and frameworks and applying them pragmatically.
• Curiosity -You're excited to experiment and explore new technologies rather than waiting for someone to tell you exactly what to try.
• Collaboration -You communicate clearly and can work effectively with colleagues from scientific, statistical, engineering, and business backgrounds.
• Enjoyment -We enjoy the work we do, collaborate openly, and try not to take ourselves too seriously all the times. That's still one area where the agents haven't caught up.

Work Location Assignment: Hybrid
Please apply by sending your CV and a motivational letter in English
This role is posted in multiple locations. If you are applying for the role in an secondary job posting location where pay transparency regulations apply, your Talent Advisor will share the local pay information with you during the first interview.
Purpose
Breakthroughs that change patients' lives... At Pfizer we are a patient centric company, guided by our four values: courage, joy, equity and excellence. Our breakthrough culture lends itself to our dedication to transforming millions of lives.
Digital Transformation Strategy
One bold way we are achieving our purpose is through our company wide digital transformation strategy. We are leading the way in adopting new data, modelling and automated solutions to further digitize and accelerate drug discovery and development with the aim of enhancing health outcomes and the patient experience.
Flexibility
We aim to create a trusting, flexible workplace culture which encourages employees to achieve work life harmony, attracts talent and enables everyone to be their best working self. Let's start the conversation!
Equal Employment Opportunity
We believe that a diverse and inclusive workforce is crucial to building a successful business. As an employer, Pfizer is committed to celebrating this, in all its forms - allowing for us to be as diverse as the patients and communities we serve. Together, we continue to build a culture that encourages, supports and empowers our employees.
Disability Inclusion
Our mission is unleashing the power of all our people and we are proud to be a disability inclusive employer, ensuring equal employment opportunities for all candidates. We encourage you to put your best self forward with the knowledge and trust that we will make any reasonable adjustments to support your application and future career. Your journey with Pfizer starts here!
Pfizer endeavors to make www.pfizer.com/careers accessible to all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process and/or interviewing, please email [email protected]. This is to be used solely for accommodation requests with respect to the accessibility of our website, online application process and/or interviewing. Requests for any other reason will not be returned.
To learn more about acceptable and prohibited uses of AI during the recruitment process, please review our candidate AI-use guidelines available on Pfizer Careers .
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