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Job ID : 1560023 Date Updated : May 13th, 2026

AI Quality Scientist

Hiring Company AI Startup
Location Tokyo - 23 Wards, Shinjuku-ku
Job Type Permanent Full-time
Salary 8 million yen ~ 16 million yen

Work Style

Casual Clothing Side Business Ok Flex Time

Job Description

1. Evaluation Metric R&D

Research and implement LLM-as-Judge calibration (rubric design, bias detection,

scoring rules).

Design and validate bespoke evaluation benchmarks to ensure construct validity.

Apply Reward Modeling and preference learning to improve evaluation accuracy.

2. Automated Pipeline Engineering

Build scalable automated evaluation pipelines integrated into CI/CD.

Develop agent evaluation harnesses supporting multi-turn dialogues, tool-use,

and long-context scenarios.

3. Red Teaming & Safety

Automate adversarial testing and build policy compliance verification frameworks.

  • Develop hallucination detection and calibration methods.

 

General Requirements

Minimum Experience Level Over 6 years
Career Level Mid Career
Minimum English Level Business Level (Amount Used: English Only)
Minimum Japanese Level None
Minimum Education Level Post Grad Degree (PHD/MBA etc)
Visa Status Permission to work in Japan required

Required Skills

Minimum Qualifications

・Education: Master’s degree or higher in CS, Machine Learning, Statistics, Physics,

or related quantitative fields.

・Experience: 3+ years as an ML Engineer, Data Scientist, or Research Engineer.

・Technical: Proficiency in Python and ML frameworks (PyTorch, JAX, etc.).

・Domain Knowledge: Deep understanding of Generative AI evaluation

(benchmarking, quantitative quality measurement).

・Language: Business-level English proficiency.

 

Preferred Qualifications

・Publication record at top-tier conferences (NeurIPS, ICML, ACL, etc.).

・Experience with RLHF, DPO, or preference learning.

・Expertise in AI Safety, Responsible AI, and automated red teaming.

 

Job Location

  • Tokyo - 23 Wards, Shinjuku-ku

Work Conditions

Job Type Permanent Full-time
Salary 8 million yen ~ 16 million yen
Work Hours 10:00~19:00
Industry Internet, Web Services

Job Category

Company Details

Company Type Small/Medium Company (300 employees or less)
Non-Japanese Ratio About half Japanese