Senior Build Engineer - AI-Driven Full-Stack Systems

Pfizer Belgium

Little Rock (AR)

Hybrid

USD 177,000 - 294,000

Full time

14 days+

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Job summary

Pfizer seeks a senior Build Engineer to deliver AI-powered medical affairs platforms. This hands-on role writes full-stack code, validates AI-generated work, and ships production systems across the stack, collaborating with Solution Architecture, Data Integration, Product Management, and UX teams.

The position is hybrid in the United States, with a base salary range of $176,600 to $294,300, plus a target bonus of 20%.

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 whatever language or framework the problem requires.
Integrate Agentic AI, LLM-based capabilities, and RAG pipelines into Medical Affairs products, translating architectural design into deployed, functioning services.
Take validated prototypes and MVPs through to production-grade systems, applying the quality gates and standards set by Solution Architecture and the Senior Director, Engineering.
Write and maintain code that meets the team's engineering standards for quality, maintainability, and reuse.
Document code, APIs, and system design decisions clearly and consistently as a standard part of the development process ensuring solutions are maintainable and understandable by others beyond the original author.