Software Engineer (Machine Learning & Search)

About Mercari

We believe the world needs a place where people can exchange their loved goods. That’s why we built Mercari—to connect people who want to buy and sell things of emotional value through their mobile phones. Mercari has grown to become a leading community-powered marketplace that brings together millions of people every day.

Mercari Dev Meetups

Position

Circulate all forms of value to unleash the potential in all people

"What can I do to help society thrive with the finite resources we have?" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential.For more information about Mercari Group’s mission, see Mercari's Culture Doc.

Equal Opportunity Hiring

Here at Mercari, we work to realize a world in which no one’s potential is limited by their background and everyone has the opportunity to freely create value. We also firmly believe that a mindset of Diversity & Inclusion is essential for us to achieve our mission.

This, of course, extends to our hiring practices as well. Mercari is committed to eliminating discrimination based on age, gender, sexual orientation, race, religion, physical disability, and other such factors so that anyone who shares our mission and values can join us, regardless of their background. For more details, please read our D&I Statement.

Work Responsibilities

• 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.

Unique and 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

Your qualification

• 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

Will be a plus

• 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

Language Requirements

• English: Independent (CEFR - B2)
• Japanese: Basic (CEFR - A2) Preferred

*For details about CEFR, see here

What we offer

• Complete health and social insurance
• Incentive program
• Support systems, including those that benefit the employee’s family members

*See this page for details

Support

• Relocation support
• Language learning support
• Translation/interpretation support

*See this page for details

Additional details

Screening Criteria

• Has leadership ability, flexibility, and time management skills
• Proactively learns new technologies and puts them into practice
• Thinks about what’s best for the product and how they can provide the most value through technology
• Sees diverse changes as opportunities for constant improvement and development
• Is able to consistently come up with ideas for improvement and act upon them

*(See this page for details.)

Language Requirements

• Either of the following is required:
• English: Independent (CEFR - B2)
• Japanese: Independent (CEFR - B2)

*Check here for more information about CEFR.

Working Conditions

Employment Status

Full-time

• Probationary period: First 3 months after joining the company. (During this period your contract conditions will be the same as that of a permanent employee.)

Office

Roppongi

• Smoking is prohibited within our offices
• Mercari has introduced a work style policy called “Your choice.” Each member is free to choose whether they want to work in the office or work fully remote. *Exceptions made for certain kinds of work.

Work Hours

• Full flextime (no “core time” or “flex time”)

*Does not apply to all positions

Holidays

• Two days off per week (as well as national holidays, New Year's break, etc.)
• Paid leave, congratulatory and bereavement leave, relax days, sick leave

Salary

• Annual salary paid in 12 monthly installments (including fixed overtime allowance)
• Based on skills, experience, and abilities
• Reviewed twice a year