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DuolingoDuolingo

Staff AI Research Engineer

Build and deploy AI systems (LLMs, bandits) for monetization, balancing revenue and retention. Requires advanced ML degree or equivalent, applied large-model experience, and leadership skills.

About the job

Responsibilities

  • Join a full-stack team of frontend, backend, and other AI Research engineers, fostering a collaborative and innovative work environment.
  • Contribute to the development and training of bandit models and large-scale neural network models.
  • Collaborate with cross-functional teams to understand their needs, to align the models’ outputs with company objectives.
  • Participate in and help drive strategic product and business decision-making as a member of the Monetization leadership group.
  • Stay up-to-date with the latest developments in machine learning, particularly in LLMs and bandits, and apply this knowledge to drive advancements in our projects.
  • Mentor team members, providing guidance and support in their professional development.
  • Ensure the delivery of high-quality, scalable, and efficient machine learning solutions.

Requirements

  • Proven experience as an AI research engineer, for example, in LLMs, bandits, computer vision, or related fields.
  • Strong background in training and fine-tuning large models in an applied setting.
  • Advanced degree in Computer Science, Engineering, or a related field with a focus on machine learning or artificial intelligence, or equivalent experience.
  • Excellent leadership and communication skills, with the ability to manage and inspire a team.
  • Deep understanding of machine learning concepts, frameworks, and best practices.

Nice-to-Haves

  • Experience across various machine learning techniques including large language models, multi-armed bandits.
  • Experience at all levels of the ML stack, including feature engineering, developing training data, fine-tuning, reinforcement learning, quality evaluations, deployment, and monitoring.

Skills

Machine Learning, LLMs, Multi-Armed Bandits, Reinforcement Learning, Fine-Tuning, Feature Engineering, Model Deployment, Model Monitoring, Computer Vision, Python

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