Software Engineer, Backend [US App] – Mercari



  • Design, develop, test, deploy, maintain, and improve backend software

  • Write code in Go and PHP

  • Work with Product Managers and Designers

  • Collaborate with iOS and Android Engineers to develop new features

  • Collaborate with QA Engineers to deliver high-quality features quickly

  • Work with third-party vendors to integrate new functionality

  • Solve complex architectural challenges

  • Write and maintain technical documentation

Bold Challenges

  • Develop product features in a fast-paced Silicon Valley startup environment

  • Design highly scalable systems that can support the continued growth of Mercari US

  • Proactively share ideas and contribute to our engineering culture

  • Gain a deep understanding of the US market to ensure Mercari’s continued success

  • Work effectively in a multicultural environment with colleagues from various backgrounds


  • 3+ years of industry programming experience

  • Professional engineering experience with consumer applications

  • Exceptional communication skills

  • Experience developing complex software systems scaling to millions of users with production-quality deployment, monitoring, and reliability

  • A positive attitude and an insatiable desire to learn

Preferred Experience

  • Experience with PHP or Go

  • Experience designing, developing, and managing microservices

  • Experience with Docker and Kubernetes or similar systems

  • Experience working on GCP or AWS or similar systems

  • Excellent knowledge of distributed systems

  • Demonstrated ability to write code with appropriate tests

  • Experience leading or managing teams

  • Experience working in large, cross-functional teams

  • Experience mentoring engineers

  • Experience working in an Agile environment

  • Experience with JavaScript ES6 and modern frontend frameworks such as React, Angular or Vue

About Mercari

Largest C2C marketplace in Japan and Japan’s first tech unicorn, Mercari is aiming to become a truly global tech company. Mercari is a smartphone-focused C2C marketplace app allowing anyone with a smartphone to easily sell items they no longer need, providing a new and unique user experience.