This position is closed and is no longer accepting applications.

Software Engineer, Machine Learning & Search

Mercari Minato-ku, Tokyo
    💴 No salary range given
    🏡 Fully remote
    🧪 Minimum years of experience unspecified
    💬 No Japanese required
    🌏 Apply from abroad
    🧳 Relocate to Japan

About Mercari

Mercari Minato-ku, Tokyo

Mercari is a marketplace app that makes it easy for people to safely sell and ship their things. Having been downloaded over 100 million times, it is now among the largest peer-to-peer selling platforms globally.

Key benefits

  • Full flextime
  • Outside work encouraged
  • Employee stock ownership program

About the position

Platform engineers for machine learning/search systems develop the functions and services of the marketplace app Mercari through the development and maintenance of infrastructure and platforms. Mercari is actively applying machine learning/search technology to provide a more convenient, safer, and more enjoyable marketplace. Machine learning/search platform engineers use the cloud and Kubernetes to operate and improve machine learning/search systems.

Bold Challenges

  • Develop libraries and frameworks to improve the availability of machine learning/search systems
  • Improve the existing machine learning/search infrastructure and leverage industry-leading best practices to help the AI/search team operate
  • Disseminate the best practices of machine learning/search engine operation, improve the development process, and improve the skills of engineers
  • Develop and improve monitoring and logging systems for the evaluation of machine learning models/search experiments
  • Collaborate with other teams to develop large-scale infrastructure


  • Operating a web system
  • Over 5 years of software development experience and over 3 years of Java, Python or Golang development experience
  • End-to-end backend system development experience
  • Basic knowledge and skills related to security, basic knowledge and troubleshooting skills related to RDBMS, SQL, network, Linux, monitoring system, logging, and operation
  • Communication skills to carry out projects in collaboration with multiple teams and stakeholders

Nice to haves

These aren’t required, but be sure to mention them in your application if you have them.

  • Developing and operating large-scale distributed systems (Kubernetes, Hadoop, etc.)
  • Functional development and bug fixing skills necessary to improve system performance and reliability
  • Using container technology such as Docker and Kubernetes
  • Using the cloud (AWS, GCP, Microsoft Azure, etc.)
  • Microservice development and operation experience with Docker and Kubernetes
  • Using one or both of the following:
    • Machine learning: TensorFlow Serving, TensorFlow Lite, ONNX
    • Search: Elasticsearch, Solr or other OSS search engines
  • Japanese ability

Meet Mercari's Developers

Jieqiong shares her experience of joining Mercari and working as a tech lead. She explains their engineering culture and provides tips for potential applicants.

Read her story...

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