
Principal AI Engineer â Tech@Lilly Japan (APEX - AI Products & Experience)
- Apex
- AI
- AI/ML
- MCP
- RAG
- MLOps
- Devops
- CI/CD
- Snowflake
- Python
- Azure
- AWS
- GCP
- LangGraph
- GitHub Actions
- Docker
- Kubernetes
- IaC
- PySpark
- Machine Learning
- Lean
At Lilly, the work is demanding because patients are waiting. We unite caring with discovery to help make life better for people around the world, knowing that every decision, every detail, and every day matters. Headquartered in Indianapolis, Indiana, our over 50,000 employees around the globe take on complex challenges to discover and deliver life-changing medicines, strengthen how health is understood and managed, and support the communities we serve. This is hard, urgent, selfless workâbut itâs work worth doing. If youâre driven by purpose and ready to bring your best to work that truly matters for patients, we invite you to join us.Â
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<English>
The Principal AI Engineer is a hands-on technical contributor who builds and operationalizes AI capabilities for Japan's AI portfolio. Working within APEX (AI Product & Experience) and partnering closely with the Architects, this role designs, builds, and evaluates the applications, pipelines, and reusable components that take AI and generative AI solutions from prototype to production. The focus is applied AI/ML engineering with a forward lean toward agentic AI solutions to transform business processes, operationalizing them reliably, and testing enterprise AI capabilities so the right ones get reused in the platform. This role suits someone who operates independently, contributes to technical design decisions, and builds production-grade systems.
Primary Role & Responsibilities
This job description provides a general overview of the role at the time it was prepared; responsibilities may evolve over time.
- Partner with product owners, delivery teams, architecture, and business stakeholders to turn requirements into working solutions across the product lifecycle (SDLC).
- Contribute to technical design discussions for POC and production work; independently drive scoped delivery while escalating risks appropriately.
- Track the evolving AI landscape (foundation models, communication protocols e.g. MCP, agentic frameworks e.g. A2A, and industry standards) and translate what matters into practical recommendations.
- Clearly communicate technical decisions, capabilities, and limitations to technical and business audiences, alike.
Supplementary Responsibilities
Build
- Design, build, test, and iterate on generative AI solutions â AI (including Advance AI)-powered applications, retrieval-augmented generation (RAG), and agentic systems with tool use and multi-step reasoning.
- Decompose business processes into components suitable for AI assistance, from productivity tools to multi-agent workflows.
- Build and maintain the data and integration pipelines that support AI products.
Operationalize
- Apply MLOps / LLMOps practices â deployment, versioning, monitoring, evaluation pipelines, cost/latency monitoring, and guardrails.
- Apply software engineering and DevOps fundamentals â CI/CD, containerization, version control, testing, and documentation.
- Monitor production solutions for drift and performance degradation and drive resolution.
Evaluate and Reuse
- Test and benchmark enterprise AI platforms and capabilities (e.g. Snowflake, internal Lilly AI capabilities), assessing fit, performance, and reusability for the Japan portfolio.
- Design for reuse and scalability, so capabilities work across initiatives rather than serving a single use case.
- Contribute to Japan's AI foundation layer, partnering with the Architecture & Technology AI lead on shared building blocks and implementation patterns.
Minimum Qualification Requirements
- Bachelor's or Master's degree in Computer Science, Data Science, Engineering, or a related technical field.
- Three or more years of hands-on AI/ML or software engineering experience, with a demonstrated track record of building AI-powered tools or applications that were actually adopted by end users â not just technically functional.
- Strong programming skills in Python.
- Hands-on experience developing and deploying LLM-based applications â including prompt/context engineering, RAG, or agentic workflows.
- Working knowledge of MLOps / LLMOps practices â versioning, monitoring, deployment, and evaluation.
- Experience with at least one major cloud platform (Azure preferred; AWS or GCP transferable).
- Solid understanding of modern software engineering practices and the development lifecycle (SDLC).
- Business-level fluency in English.
Additional Preferences
- Experience with agentic AI frameworks and emerging standards (e.g. LangGraph, MCP).
- Familiarity with DevOps tooling â CI/CD (e.g. GitHub Actions), Docker, Kubernetes, infrastructure-as-code.
- Comfort using AI-assisted coding tools to accelerate prototyping and experimentation (a core way of working on this team).
- Additional languages relevant to the stack (e.g. PySpark for data-heavy workloads, Go for services) are a plus.
- Exposure to AI security, data privacy, and governance practices.
- Experience in a regulated industry (pharmaceutical, healthcare, finance).
- Comfort in a fast-moving environment where the technology landscape shifts frequently.
- Business-level fluency in Japanese (preferred, not mandatory).
- Specialization or certifications in Machine Learning, Data Science, AI Engineering, or Cloud Architecture are a plus.
Lilly is dedicated to helping individuals with disabilities to actively engage in the workforce, ensuring equal opportunities when vying for positions. If you require accommodation to submit a resume for a position at Lilly, please complete the accommodation request form (https://careers.lilly.com/us/en/workplace-accommodation) for further assistance. Please note this is for individuals to request an accommodation as part of the application process and any other correspondence will not receive a response.
Lilly does not discriminate on the basis of age, race, color, religion, gender, sexual orientation, gender identity, gender expression, national origin, protected veteran status, disability or any other legally protected status.
#WeAreLillyPrincipal AI Engineer â Tech@Lilly Japan (APEX - AI Products & Experience) · Eli Lilly and Company