Machine Learning Engineer at Mercari

Setup: Hybrid
Location: Tokyo
Type: Full-time
Posted: May 26, 2026

Description

Mercari is seeking a Machine Learning Engineer specializing in AI/Large Language Models (LLMs) to design, build, and optimize ML models for various business aspects. This role involves developing AI-driven solutions leveraging Mercari's extensive data assets, integrating ML solutions into products, and contributing to research and innovation in AI/LLM developments.

Required Skills

Python
PyTorch
TensorFlow
Architectural Patterns
Analytical Skills
Communication Skills

Additional Information

Required Previous Experiences: Proficiency in Python and experience with ML frameworks such as PyTorch or TensorFlow.
Demonstrated experience in the end-to-end ML lifecycle, from development to deployment.
Preferred Qualifications: Experience with deploying AI solutions in large-scale production environments.
Master’s or Ph.D. degree in Computer Science, AI, ML, or a related technical field.
Background in generative AI, LLM, and natural language processing (NLP).
Experience in multilingual and multimodal models, and efficient training and inference techniques.
Participation in the open-source community and contributions to AI/ML projects.

About Mercari

Mercari

Discover deals on everything from secondhand fashion to pre-owned collectibles, electronics, books & more on Mercari. Your go-to marketplace for hassle-free selling and deals.