Director Build Engineer — AI-Driven Production Systems

Pfizer, S.A. de C.V; Collegeville, Northern (PA, KY); Hybrid; USD 177,000 - 294,000; Full time

Job summary

Pfizer seeks a hands-on Senior Build Engineer to own AI-powered software across the Medical Affairs AI Acceleration portfolio. You will write, test, and ship production-grade code, integrate Agentic AI and LLM capabilities, and verify AI-generated code with rigorous review.

Expect cross-functional collaboration with Solution Architecture, Product Management, and UX to deliver scalable, reliable systems. The role emphasizes architectural alignment, production readiness, and ownership across the

Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field.
• 8+ years of hands-on software engineering experience.
• Experience building and shipping production software across the full stack, with the ability to work across multiple languages and frameworks as needed.
• Experience integrating AI/ML or LLM-based capabilities into production systems.
• Experience taking prototypes/MVPs through to production-grade, scalable systems.
• Experience with modern cloud architecture (AWS or Azure), API-first design, and CI/CD practice.
• Experience with Agile/Scrum delivery frameworks.
• Strong verification and code-review discipline, including review of AI-generated code.
• Experience designing and optimizing LLM/agent prompts and workflows for token efficiency, balancing cost, latency, and output quality at production scale.
• Strong written communication skills, with a track record of producing clear, current technical documentation for code, APIs, and system design decisions.

Responsibilities

• Build, test, and ship production-grade software across the stack, using the language/framework required by the problem.
• Integrate Agentic AI, LLM-based capabilities, and RAG pipelines into Medical Affairs products, translating design into deployed services.
• Take validated prototypes and MVPs through to production-grade systems, applying quality gates and standards.
• Write and maintain code that meets engineering standards for quality, maintainability, and reuse.
• Document code, APIs, and system design decisions clearly as a standard development practice.
• Partner with Data Integration Engineer to ensure reliable data pipelines and enterprise system integrations.

Skills

Full-stack development

AI/LLM integration

CI/CD pipelines

Agile/Scrum delivery

Code review discipline

Technical documentation

Systems integration

Education

Bachelor's degree in Computer Science, Engineering, or related field

Tools

AWS

Azure

Job description

Pfizer seeks a hands-on Senior Build Engineer to own AI-powered software across the Medical Affairs AI Acceleration portfolio. You will write, test, and ship production-grade code, integrate Agentic AI and LLM capabilities, and verify AI-generated code with rigorous review.

Expect cross-functional collaboration with Solution Architecture, Product Management, and UX to deliver scalable, reliable systems. The role emphasizes architectural alignment, production readiness, and ownership across the