Software Engineer (Machine Learning & Search) for Ads - Mercari

Job Offer: Software Engineer (Machine Learning & Search) for Ads - Mercari

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 .

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 Inclusion & Diversity 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 .

Position Overview

Work Responsibilities

Improving ad performance through the design, development, and maintenance of Elasticsearch

Enhancing ad matching and search result relevance through the analysis and tokenization of queries using NLP

Collaborating with data scientists and other engineers to enhance the integration and performance of Elasticsearch

Unique and Bold Challenges

Launching advertising solutions on media with over 20 million MAUs

Mercari is providing advertising solutions, but is still in its early stages. It is expected to make a significant impact on the Japanese advertising market in the future.

Challenging revolutionary advertising measures that go beyond conventional frameworks

Advertising solutions are offered on many platforms, and there are numerous success stories. We can leverage the benefits of existing solutions to provide even better ones.

Required Skills

Development and operational experience with Elasticsearch

Knowledge and experience in search algorithms, relevance tuning, query optimization

Expertise in natural language processing (NLP) technologies and tools

Experience in handling data index, ETL processes, and large data sets

Preferred Skills

Experience in advertising domain or advertising platform

Experience with Elasticsearch, Solr or other OSS search engines and analytical tools

Knowledge of machine learning and data science related to search and personalization

Experience in monitoring and log analysis (e.g., Grafana, Prometheus, ELK stack)

Language Requirements

Japanese: Proficient (CEFR - C1)

English: Basic (CEFR - A2) Preferred

For more details about CEFR, please see

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,