Machine Learning Engineer II, LLM Applied Science

Remote, USA
Posted Jun 14, 2026
Full-time

Pinterest is a platform that inspires creativity and innovation. They are seeking a Machine Learning Engineer II to contribute to cutting-edge research in large language models and generative AI, translating research insights into practical solutions and collaborating with engineering teams.

Responsibilities

  • Contribute to cutting-edge research in LLMs and generative AI that can be applied to Pinterest problems
  • Collect, analyze, and synthesize findings from data, translate research insights into practical, scalable solutions
  • Curate and generate training data with strong quality controls
  • Build reliable evaluation strategies for LLM systems (offline metrics, human evaluation, redteaming, robustness & safety)
  • Write clean, efficient, and sustainable code, collaborate closely with engineering partners to land research into real systems
  • Develop LLM powered methods to solve modeling and ranking problems across growth, discovery, ads and search
  • Explore and productionalize techniques such as instruction tuning, preference optimization, RAG / tool-calling, and prompt / model optimization
  • Scope and independently solve moderately complex problems

Skills

  • MS/PhD in Computer Science, ML, NLP, Statistics, Information Sciences or related field
  • 1-2 years of internship or professional experience
  • Strong foundation in modern deep learning for NLP (transformers, representation learning, scaling law)
  • Mastery of at least one systems languages (Java, C++, Python) or one ML framework (Tensorflow, Pytorch, MLFlow)
  • Experience in research and in solving analytical problems
  • Cross-functional collaborator and strong communicator
  • Comfortable solving ambiguous problems and adapting to a dynamic environment

Benefits

  • Equity

Company Overview

  • Pinterest is a visual bookmarking tool for saving and discovering creative ideas. It was founded in 2010, and is headquartered in San Francisco, California, USA, with a workforce of 1001-5000 employees. Its website is https://www.pinterest.com/.

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