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About the Role
Auxia is expanding its data science function in Japan to help build a platform that can succeed in the Japanese and global markets. As a Senior Data Scientist, you will solve business-critical problems and be trusted to solve some of the hardest problems in the company.
Responsibilities
- Assist customer teams in understanding their business problems and support AI PMs in creating scalable ML solutions for Japanese customers.
- Architect and advance large-scale recommender and ranking models powering adaptive customer journeys.
- Lead experimentation frameworks that bridge causality, personalization, and business impact.
- Collaborate with Data Science and Engineering teams in Palo Alto, Bengaluru & Tokyo to extend models into the core Auxia product for global use-cases.
- Translate learnings from Japanese customers into feedback, tooling, and documentation for future product roadmapping.
- Incorporate ideas from academia and industry research into production.
Requirements
- Built and shipped personalization, ranking, and recommendation models in production.
- Strong working knowledge of causal inference and sequence architectures such as transformers.
- Mastery of PyTorch / TensorFlow, and the Python data ecosystem (NumPy, Pandas, SciPy).
- Strong SQL skills against large-scale data warehouses (BigQuery, Snowflake).
- Strong applied experience with LLMs, information retrieval, and reinforcement learning.
- Strong product sense, with the ability to balance research depth and real-world impact.
- An entrepreneurial, ownership-driven mindset with the ability to ship, iterate, and scale models fast.
- Japanese language proficiency of JLPT N2 level equivalent or higher.
- English working-level proficiency.
Skills
- PyTorch
- TensorFlow
- Python
- NumPy
- Pandas
- SciPy
- SQL
- BigQuery
- Snowflake
- LLMs
- Information Retrieval
- Reinforcement Learning
- Causal Inference
- Transformers
Location
- Tokyo
Work Type
- Onsite
Experience Level
- Senior
Education Level
- B.Tech/M.Tech/PhD or related course in Computer Science, Machine Learning, or related field
About the Company
- Auxia is an agentic AI platform that helps enterprises deliver personalized 1:1 customer journeys.
- The Decision Agent processes 3B+ events/day, 25K+ queries/second, and 1B+ decisions/day at sub-100ms latency.
- Serves global enterprises including Atlassian, The Guardian, Docomo, Comcast, Mercari, and MUFG Bank.
- Backed by $23.5M from VMG Technology Partners, Stage 2 Capital, and MUFG Innovation Partners.
- Founded by senior leadership in marketing and engineering from Google.
- Team members come from companies such as Meta, Amazon, Microsoft, Lyft and DoorDash.
- Uses Claude Code extensively for AI-native development.
- Small team (~30 engineers across US, India, and Japan) with high ownership.
- Focuses on shipping weekly with rapid iterations.
Equal Opportunity
- Auxia is committed to building a diverse and inclusive workplace. We welcome applicants from all backgrounds.