Generative AI Lead Developer

About the job

At EY, we’re all in to shape your future with confidence. We’ll help you succeed in a globally connected powerhouse of diverse teams and take your career wherever you want it to go. Join EY and help to build a better working world. Generative AI Lead Developer Role Overview: The Generative AI Lead Developer will be responsible for designing, building, and deploying cutting-edge generative AI applications and services. This role involves hands-on development of LLM-powered solutions such as copilots, virtual assistants, and document intelligence tools, while also leading a team of developers in implementing scalable, secure, and compliant GenAI systems. You’ll collaborate closely with AI architects, data scientists, and business product owners to bring generative AI use cases from prototype to production, ensuring high performance, safety, and business alignment. Responsibilities: Solution Development • Develop and deploy generative AI applications using LLMs (GPT, Claude, Gemini, Mistral, etc.) and orchestration frameworks (LangChain, LlamaIndex, Semantic Kernel). • Implement Retrieval-Augmented Generation (RAG) pipelines integrating vector databases. • Design and optimize prompts, chains, and agentic workflows for domain-specific use cases. • Integrate AI models into enterprise systems via APIs and microservices Technical Leadership • Lead a small team of AI developers and ML engineers to deliver high-quality, production-ready GenAI solutions. • Establish coding best practices, CI/CD pipelines, and MLOps integration for model deployment and monitoring. • Conduct code reviews, performance tuning, and prompt optimization. • Partner with the AI Architect to design scalable and reusable components. • Work cross-functionally with business analysts and product teams to translate business needs into technical implementations. • Collaborate with data engineers on data curation, preprocessing, and embedding pipelines. Model Management • Evaluate, fine-tune, and deploy large language models (LLMs) and multimodal models. • Manage model lifecycle — versioning, retraining, and observability. • Implement guardrails for content filtering, prompt injection defense, and output validation. Qualifications: • Bachelor’s or Master’s degree in Computer Science, AI/ML, Data Science, or related field. • 6–10 years of total experience, including at least 2–3 years in AI/ML solution development. • Strong proficiency in Python and experience with AI/ML frameworks (PyTorch, TensorFlow, Hugging Face Transformers). • Proven hands-on experience developing solutions using LLM APIs (OpenAI, Azure OpenAI, Anthropic, Cohere, etc.). • Experience with prompt engineering, embeddings, and vector search. • Solid understanding of MLOps tools and deployment (Docker, Kubernetes, MLflow, Databricks, Azure ML, or AWS SageMaker).

Requirements

• Python
• AI/ML frameworks
• Data Science
• MLOps
• LLM APIs

Qualifications

• Bachelor's or Master's degree in relevant field
• 6–10 years of experience

Preferred Technologies

• Python
• AI/ML frameworks
• Data Science
• MLOps
• LLM APIs

About the company

EY is building a better working world by creating new value for clients, people, society, and the planet, while building trust in capital markets. Enabled by data, AI and advanced technology, EY teams help clients shape the future with confidence and develop answers for the most pressing issues of today and tomorrow. EY teams work across a full spectrum of services in assurance, consulting, tax, strategy, and transactions.