Machine Learning Engineer, Generative AI - Tech Lead

We are looking for a Machine Learning Engineer, Generative AI - Tech Lead to join the team as an individual contributor. You will take technical ownership of Generative AI capabilities from experimentation through production, combining hands-on machine learning and software engineering with technical leadership. Working closely with applied researchers, engineers, product teams, and AI platform teams, you will help shape technical approaches, lead execution, and build scalable AI capabilities that deliver measurable impact for eBay customers., * Lead the technical design and delivery of Generative AI and machine learning capabilities, taking them from experimentation and prototyping through production deployment and continuous improvement.

• Build systems involving LLMs, multimodal models, agents, retrieval and context, embeddings, model adaptation, and learning from feedback, while remaining hands-on in implementation and experimentation.
• Make technical and architectural decisions across the ML lifecycle, including data, model training and fine-tuning, evaluation, deployment, inference, monitoring, and continuous improvement.
• Partner with applied researchers and engineers to translate promising research into scalable production capabilities, guiding technical execution and helping others solve complex implementation challenges.
• Drive improvements in model and system quality while balancing latency, cost, scalability, reliability, maintainability, and observability in production.
• Collaborate across research, engineering, product, and platform teams, mentor other engineers, and contribute to strong technical, engineering, and experimentation practices.

• Minimum 5 years of hands-on experience developing and deploying machine learning systems, with a track record of owning significant ML capabilities from development through production.
• Strong expertise in modern machine learning and experience in one or more areas such as Large Language Models, multimodal models, NLP, agents, retrieval, model adaptation, or learning from feedback.
• Experience across the ML lifecycle, including model training or fine-tuning, evaluation, deployment, inference, monitoring, and performance optimization.
• Strong software engineering skills, particularly in Python and modern ML frameworks such as PyTorch, together with experience designing scalable, reliable, and maintainable production systems.
• Demonstrated technical leadership, including making architectural decisions, driving technical execution, mentoring others, and navigating tradeoffs across model quality, latency, cost, and reliability.
• Ability to independently lead complex technical problems and collaborate effectively across research, engineering, product, and platform teams to deliver measurable customer and business impact.

At eBay, we’re more than a global ecommerce leader - we’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts.

Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work - every day. We’re in this together, sustaining the future of our customers, our company, and our planet.

Join a team of passionate thinkers, innovators, and dreamers - and help us connect people and build communities to create economic opportunity for all.

At eBay, we’re more than a global ecommerce leader. We’re changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. We’re committed to pushing boundaries and reinventing the future of ecommerce for enthusiasts.