NLP Data Science Team Leader

Walmart Global Tech Israel’s presence began with Aspectiva, Walmart's first acquisition in Israel. The team is an integral part of the core of Walmart’s e-commerce platform – the largest retailer in the world.

We develop state-of-the-art NLP solutions that enable millions of Walmart shoppers to make smarter and more confident buying decisions.

We are looking for an experienced NLP Data Science Team Leader to lead a team of talented NLP Data Scientists and drive the development of cutting-edge NLP solutions at scale. This role combines hands-on technical leadership, people management, and strategic influence over product and research directions.

Responsibilities

• Lead and grow a team of NLP Data Scientists
• Manage, mentor, and support team members’ professional development
• Foster a culture of excellence, ownership, and continuous learning
• Own end-to-end delivery of NLP solutions
• Oversee algorithmic features from ideation through research, development, and production
• Ensure high-quality, scalable, and maintainable solutions
• Drive technical direction and innovation
• Guide research efforts and evaluate new NLP/ML technologies
• Translate business needs into impactful NLP solutions
• Collaborate cross-functionally
• Work closely with Product, Engineering, and Business stakeholders
• Align team priorities with company goals and product roadmap
• Maintain hands-on involvement
• Contribute to architecture, modeling, and critical algorithmic challenges
• Review code, experiments, and methodologies
• Scale impact
• Improve processes, workflows, and best practices for research and production
• Ensure efficient use of large-scale data and infrastructure
  
  

• MSc in Computer Science, Mathematics, Engineering, or equivalent experience
• Strong NLP expertise – Must
• Deep understanding of modern NLP methods (transformers, LLMs, embeddings, etc.)
• Proven experience delivering NLP solutions to production
• Leadership experience – Must
• 2+ years of experience managing or leading data science / ML teams
• Demonstrated ability to mentor and grow team members
• Hands-on ML/NLP experience – Must
• 5+ years of experience in research and implementation of ML-based solutions
• Strong coding skills (Python – must; Java/C#/Scala – advantage)
• Production experience – Must
• Experience deploying and maintaining ML/NLP systems in production environments
• Familiarity with scalable systems and data pipelines
• LLM + Deep Learning experience – Must
• Experience working and training LLMs, and deploying them at large-scale
• Experience with modern DL frameworks (PyTorch, TensorFlow)
• Strong problem-solving and critical thinking skills
• Excellent communication skills
• Ability to communicate complex ideas to both technical and non-technical stakeholders
  
  

• Experience in e-commerce or recommendation systems
• Experience with experimentation, A/B testing, and product impact measurement
• Background in leading cross-team or cross-domain initiatives
  
  

• Direct impact on millions of users in one of the largest e-commerce platforms in the world
• A rare combination of research, production, and leadership
• Opportunity to shape both team culture and technical direction