[AI Engineer/Series A] Measuring Human Potential with Foundation Models x Reinforcement Learning | Research and Development with Data from Tens of Thousands of Test-TakersEnglish summary from Japanese

株式会社VARIETAS

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Salary

1,000万円〜 2,000万円

Role summaryEnglish summary from Japanese

English summary for screening — check the original posting before applying.

VARIETAS is redesigning how people and opportunities meet using AI and technology. They are seeking an AI Engineer to build and improve the foundation models that power their AI Interviewer product, which has been adopted by major Japanese corporations. This role involves research and development on foundation models and reinforcement learning cycles.

Must-haves

Practical experience in developing and operating models using machine learning/deep learning (mid-level or above)
Experience implementing AI/ML infrastructure using Python or similar languages
Experience in research, development, and application of LLM and Natural Language Processing (NLP)
Design capability to articulate and lead discussions on methodology ('Why this method?')
Must work onsite in Tokyo

Nice-to-haves

Experience in research and implementation of reinforcement learning (RL/RLHF, etc.)
Knowledge of model alignment, fairness, and explainability (XAI)
Experience designing and building data pipelines and model operations (MLOps)
Experience designing models based on ontologies/graph structures

About the Company

株式会社VARIETAS

Posted8/19/2026

Sourcefindy

[AI Engineer/Series A] Measuring Human Potential with Foundation Models x Reinforcement Learning | Research and Development with Data from Tens of Thousands of Test-TakersEnglish summary from Japanese

Role summaryEnglish summary from Japanese

Must-haves

Nice-to-haves

About the Company

Tech stack

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