CareerPlan

Applied Researcher

AachenFull-time2026-09-15 → 2026-11-14

Core

Conduct applied research on Generative AI and foundation models to develop new approaches and translate them into scalable capabilities for eBay's global marketplace.

Role type

Senior IC Applied Researcher (Generative AI)

Builds

Next-generation Generative AI capabilities and products powering intelligent experiences at global scale

Domain

Ecommerce + Generative AI / Foundation Models

Deliverable

production ML models

Required skills

PhD in CS/ML/AI/CL, hands-on research in LLMs/multimodal models/NLP/agents/post-training/reinforcement learning/retrieval, strong ML methods understanding, Python programming, PyTorch, model training/fine-tuning/evaluation, translating research to production

Preferred skills

experience with production ML systems

Technologies

Python, PyTorch, LLMs, multimodal models, agents, reinforcement learning, retrieval

Responsibilities

Research, develop, and evaluate new approaches for Generative AI and foundation models; Design and run rigorous experiments across LLMs, multimodal models, agents, and post-training; Develop models and prototypes and work with ML engineers to translate research into scalable systems; Build and improve methods for model training, fine-tuning, evaluation, and continuous improvement; Work with large-scale data to formulate research problems and measure impact; Collaborate across research, engineering, product, and platform teams

Seniority

Senior, hands-on IC