Company Logo
Software Engineer

Netflix - 1d ago

Company Logo
Senior Software Engineer

Reddit - 4d ago

Applied Researcher

Requirements:

  • Master’s, PhD, or equivalent experience in Computer Science, Machine Learning, Artificial Intelligence, Computational Linguistics, or related field with 4 or more years of relevant work experience
  • Strong hands-on experience developing, evaluating, and improving machine learning models or foundation-model capabilities
  • Solid understanding of machine learning, NLP, Large Language Models, neural architectures, embeddings, retrieval, ranking, personalization, or multimodal modeling
  • Experience with model training, fine-tuning, adaptation, evaluation, benchmarking, and performance analysis
  • Experience with feedback-driven learning systems, such as preference learning, reward modeling, bandits, reinforcement learning, or continuous model improvement loops
  • Ability to design experiments, define meaningful metrics, interpret results, and communicate findings clearly
  • Proficiency in Python and experience with modern ML frameworks such as PyTorch, TensorFlow, or similar
  • Experience working with large-scale datasets, model training or evaluation pipelines, and applied research workflows
  • Ability to translate product or platform problems into concrete research questions and practical solution approaches
  • Ability to consider tradeoffs across model quality, latency, cost, reliability, and maintainability

What you'll be doing:

  • Research and evaluate machine learning and Generative AI capabilities for large-scale ecommerce applications
  • Contribute to applied research in various areas such as LLMs, retrieval-augmented generation, embeddings, multimodal modeling, ranking, agentic systems, and feedback-driven learning
  • Improve modeling approaches, training methods, adaptation techniques, and evaluation frameworks for foundation-model-powered ecommerce experiences
  • Design and run experiments to measure model quality, robustness, efficiency, and customer impact
  • Develop learning systems that improve from feedback signals, including reinforcement learning, preference optimization, reward modeling, bandits, and online/offline feedback loops
  • Analyze model behavior, failure modes, and data patterns to identify limitations and propose practical improvements
  • Build training, fine-tuning, evaluation, and experimentation pipelines for machine learning models
  • Collaborate with senior applied researchers, machine learning engineers, and platform teams in advancing promising prototypes toward production
  • Collaborate with engineering, product, and platform teams to integrate AI capabilities into eBay experiences
  • Stay current with advances in machine learning, Generative AI, and foundation models, and evaluate relevant techniques through hands-on experimentation
  • Contribute to scientific and technical standards through structured experimentation, peer review, documentation, and clear technical communication
  • Contribute to publications, patents, internal research reviews, and technical discussions where appropriate

Nice to haves:

  • Good collaboration and communication skills with experience working across research, engineering, product, or platform teams
  • A strong sense of ownership and a track record of delivering meaningful applied research or machine learning contributions
  • Experience contributing to applied research impact, such as publications, patents, shipped model improvements, productionalizing research prototypes, or measurable product outcomes

Perks and benefits:

  • eBay is an equal opportunity employer
  • All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, sexual orientation, gender identity, veteran status, and disability, or other legally protected status
  • Opportunity for accommodation if needed
AI Summary ✨
eBay logo

eBay

Aachen, Germany

Experience: Senior
Posted: May 21, 2026
Last seen: an hour ago
Python
machinelearning

Why we track eBay

eBay has been around longer than most companies on this board, but they still run significant engineering across Europe. The marketplace problems—search, recommendations, payments, trust—are technically interesting at their scale.

Similar jobs

  • 5 hours ago
    New
  • 7 hours ago
    New
  • jetbrains logo

    Staff/Senior AI Engineer, AI for Code

    Netherlands, Serbia, Germany, Cyprus, UK, Spain, Poland, Armenia

    a day ago
    New
    Remote
  • See all jobs in Germany