Data Scientist - Operational Excellence
Pfizer
Neo4jPythonSQL
Senior Software Engineer, Applied Research
Meedan
full-time
Posted on:
Origin: • 🇺🇸 United States
Visit company websiteJob Level
Senior
Tech Stack
Neo4jPython
About the role
- Lead experimentation on retrieval-augmented generation (RAG) approaches for question answering over a Neo4j knowledge graph.
- Develop and refine evaluation frameworks (test sets, LLM-as-a-judge rubrics, failure mode analyses, etc.).
- Investigate and implement strategies for handling conflicting, incomplete, or time-sensitive information.
- Translate product requirements into ML constraints and possibilities.
- Collaborate with engineers to validate feasibility and de-risk system architecture.
- Focus on experimentation and implementation for our Python-based knowledge service.
- Design, test and implement retrieval strategies, evaluate system trustworthiness, and help define how the service handles conflicting or outdated information.
- Work closely with product and engineering teams to ensure our AI/ML foundations are technically strong, reliable, and aligned with product goals.
Requirements
- 8+ years of professional or research experience, with deep expertise in AI/ML research or applied machine learning.
- Strong background in Python and experience with retrieval-augmented generation, LLMs, or knowledge graphs.
- Demonstrated ability to design experiments, evaluate systems rigorously, and communicate findings.
- Strong collaborator and communicator, able to bridge research and engineering.
- Nice to Have Experience with Neo4j or other graph databases.
- Background in verification workflows.
- Prior work in product-driven environments.
