What is a Data Scientist at Mercari?
As a Data Scientist at Mercari, you will sit at the intersection of product engineering, business strategy, and machine learning. Mercari operates one of the largest peer-to-peer (C2C) marketplaces in the world, which presents unique data challenges. Your role is critical because C2C transactions involve highly dynamic inventory, variable pricing, and complex user behaviors that require sophisticated algorithmic solutions.
You will have a direct impact on the user experience by building and optimizing models that power search relevance, recommendation systems, fraud detection, and personalized marketing. Unlike traditional e-commerce companies with centralized inventories, Mercari relies on its data science team to create order out of a highly decentralized and constantly changing catalog. This means your models will directly influence transaction volume, user retention, and trust across the platform.
The work environment at Mercari is fast-paced and highly collaborative, requiring you to translate ambiguous business problems into concrete mathematical frameworks. Whether you are optimizing search algorithms for the Tokyo market or analyzing user lifetime value, you will need to balance technical rigor with business agility. It is an inspiring space for data professionals who want to see their models deployed to production and affecting millions of active users daily.



