Senior AI Build Engineer - Production Systems

Pfizer Belgium; Helena (MT); Hybrid; USD 177,000 - 294,000; Full time

Job summary

Pfizer seeks a senior Build Engineer to own hands-on software delivery for AI acceleration in Medical Affairs. You will design, implement, test, and ship production-grade AI systems, integrating Agentic AI and LLM capabilities while maintaining high-quality standards and ensuring reliable operation in production.

You will collaborate with Solution Architecture, Data Integration, and Product teams to translate requirements into scalable software, balancing speed and reliability across the full

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.
• Experience integrating AI/ML or LLM-based capabilities.
• Experience taking prototypes/MVPs to production-grade systems.
• Experience with modern cloud architecture (AWS or Azure), API-first design, and CI/CD.
• Experience with Agile/Scrum delivery frameworks.
• Strong verification and code-review discipline, including AI-generated code.
• Experience designing and optimizing prompts/workflows for token efficiency.

Responsibilities

• Build, test, and ship production-grade software across the stack.
• Integrate AI and LLM capabilities into Medical Affairs products.
• Move prototypes and MVPs to production-grade systems with established gates.
• Write and maintain high-quality, reusable code and APIs.
• Document code and system design decisions for longevity and maintainability.
• Verify AI-generated code with rigorous reviews and testing.

Skills

Full-stack development

AI/ML integration

Production-grade software

Agile/Scrum

Code review & verification

LLM/Agent prompts

Documentation practice

Cross-functional collaboration

Education

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

Tools

AWS

Azure

CI/CD

Veeva CRM

Salesforce Life Sciences Cloud

Salesforce Marketing Cloud

RAG pipelines

LLMOps tooling

Job description

Pfizer seeks a senior Build Engineer to own hands-on software delivery for AI acceleration in Medical Affairs. You will design, implement, test, and ship production-grade AI systems, integrating Agentic AI and LLM capabilities while maintaining high-quality standards and ensuring reliable operation in production.

You will collaborate with Solution Architecture, Data Integration, and Product teams to translate requirements into scalable software, balancing speed and reliability across the full