Staff Machine Learning Engineer
Core
Lead the design, development, and implementation of advanced machine learning (ML), large language model (LLM), and agentic AI systems to solve complex business and customer problems.
Role type
Staff Machine Learning Engineer (LLM & Agentic AI)
Builds
Scalable, reliable ML and LLM solutions for PayPal's payment products and internal operations
Domain
Fintech / Payments / AI
Deliverable
production ML models
Required skills
ML frameworks (TensorFlow, PyTorch, scikit-learn), cloud platforms (AWS, Azure, GCP), data processing, model deployment, LLM application development, agentic system design, LLM optimization
Preferred skills
Deep neural network (DNN) design, large-scale recommendation/search/ranking systems, LLM fine-tuning (LoRA/PEFT), RAG, prompt engineering, multi-agent orchestration (LangGraph, LangChain, AutoGen), LLM evaluation and guardrails, inference optimization (vLLM, quantization)
Responsibilities
Lead development and optimization of advanced ML models, oversee preprocessing and analysis of large datasets, deploy and maintain ML solutions in production, integrate ML models into products, monitor and evaluate deployed model performance
Seniority
Staff, hands-on IC with architectural leadership
