Software Engineer (Machine Learning & Search) - Mercari

Tokyo
Remote OK - Anywhere in Japan
Full-time
September 12, 2023

Introduction

Our Mission

Mercari is a Japan-based company with the mission of “creating value in a global marketplace where anyone can buy & sell.” Having continuously worked toward this goal since our founding in 2013, we are now transforming from a startup into a global player. While this transformation brings its own specific set of challenges, we believe that solving them one after another will allow us to fully achieve our mission. Are you interested in working together to take on these exciting challenges?

Our Culture

Mercari’s culture has been central to the company since our founding, with the three core values of Go Bold, All for One, and Be a Pro. In addition, the “Trust & Openness” value was introduced to embody our culture of mutual trust, where information remains transparent and rules are kept to a minimum. Regardless of how big Mercari gets, our culture is essential to achieving our mission and will be promoted throughout our organization.

Position Overview

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.

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

Required Experience

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

Preferred Experience

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: Business level
Japanese: Conversational (preferred)

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

Scheduled working hours: 10 AM – 7 PM

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

Benefits

Complete health and social insurance
Incentive program
Support systems, including those that benefit employee family members
Language learning support
Translation/interpretation support

Support

Relocation Support

APPLY NOW ➜

About メルカリ

日本初のユニコーン企業、メルカリは日本で最も多くのユーザー数を誇る、フリーマーケットアプリを運営しています。国籍に関わらず国内外から優秀な人材を大規模に採用しています。シリコンバレーにもオフィスがあり、アメリカ向けにローカライズしたメルカリアプリを開発し、アメリカのフリーマーケット市場でもシェアを拡大しているグローバルテック企業です。

「限りある資源を循環させ、より豊かな社会をつくりたい」。創業者である山田進太郎氏が世界一周の旅で抱いた、そんな問題意識によって生まれたのがフリマアプリ「メルカリ」です。テクノロジーの力によって、世界中の個人と個人をつなぎ、誰もが簡単にモノの売り買いを楽しめる。それにより資源を循環させる豊かな社会、個人がやりたいことを実現できる社会をつくっていきたいと考えています。

これまで中古品の売買は、実店舗で行うのが一般的でした。しかし、お店に行くのに時間がかかること、お店の品揃えが限られていること、販売店が介在することで買い手も売り手も価格が不明瞭になるなどの問題がありました。また、中古品を売買するためのオンライン・オークション・サイトでは、出品手続きが難しかったり、入札に時間がかかったりするなどの問題がありました。

メルカリでは、誰もがスマートフォンを使って簡単に商品を売買することができます。また、配送業者やコンビニエンスストアとの提携により、簡単で安価な配送方法を実現しています。買う側も売る側も個人を対象としたサービスなので、不要なものを簡単に売ってお金にする楽しさや、ユニークな中古品を見つけて買うワクワク感を誰でも味わうことができます。

Japanese Language Policy
Mercari doesn't require Japanese skill for developers to do their day to day jobs. It's becoming a pretty international company, but they have many Japanese engineers, so the more Japanese you know the better.
Visa Sponsorship
Mercari sponsors Japanese visas for engineers. The only condition is that you meet the requirements of the Japanese government (but this is the case at every company). This usually means that you'll need a bachelor's degree or 10 years of demonstrated work experience in your field.
Paid Leave
- Two days off per week (Saturday and Sunday), Japanese national holidays, New Year's vacation
- Paid Leave (starting with 10 days, adding 1 day each year)
- Sick leave (10 days per year)
- Relax days (3 extra vacation days that can be taken year-round)
- Bereavement Leave
- Maternity/paternity and caregiving support
- Caregiving leave
- Paid childbirth leave and gift
- Paid honeymoon leave and gift
- Condolence money and paid leave
Benefits
🏥 Health insurance

💹 Employee stock option plan

🚃 Full transportation coverage

💻 The latest equipment - computer, monitor, smartphone

🍹 Free drinks

💴 Seminar participation support

📓 Book purchases

👩‍🎓 Language learning support

🌎 Translation/interpretation support

🍔 Chat lunch

💛 Financial support for fertility treatment

💜 Financial support for childcare costs

💚 Financial support for private preschools
Remote Work
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.

※ You will be required to come to Japan if you are living abroad.
Work style
(Dev Team Members)
- Fixed working hours 10:00-19:00.
- Flex time (core hours 12:00-16:00, 60 minute lunch)
Tech Stack
* Backend Languages: Go & PHP * Frontend Languages: HTML, CSS, JavaScript (TypeScript, React.js, Next.js, Redux, etc) * Mobile Languages: Kotlin, Swift, Java, Objective-C * Infrastructure: Dedicated servers, MySQL, memcached, Nginx, Solr, Elastic Search, Google Cloud Platform (Compute Engine, Kubernetes Engine, Spanner, Cloud SQL, Datastore, Storage, Stackdriver Logging, Dataflow, Pub/Sub, etc.) * Configuration management tool: Terraform * CI/CD: Circle CI / Spinnaker * Monitoring: Stackdriver Monitoring / Datadog / PagerDuty / Sentry / Mackerel / NewRelic / ELK Stack * Knowledge Tools: Confluence / Crowi * Other: GitHub / Slack / JIRA * Process: Scrum
Diversity
There is more diversity in the world than any of us can imagine. Diversity & Inclusion (D&I) is strongly linked to Mercari’s mission as we aim to build a company environment where everyone can be themselves and work to their fullest potential.

Diverse Backgrounds

We already have members with many diverse backgrounds at Mercari. Our goal is for everyone to have equal chances to do their best work, without dividing individuals into groups based on age, gender, sexual orientation, race, religion, physical ability, or any other identifying feature, and without classifying anyone as “majority” or “minority.” We strive to create various policies and initiatives to make this a reality.

No Quotas

Mercari does not set quotas, such as a 50:50 gender balance or a specific number of countries represented, because we feel labeling groups and people in terms of numbers goes against our ideal of respecting the diversity inherent to all individuals. Meaningful efforts towards diversity are reflected not in the quantitative goals many companies tend to rely on, but in the thoughts and behavior of every person within.

Our Focus

Providing fair chances for members of all backgrounds Fostering a culture of learning to allow everyone to reach their full potential Creating an organization built on trust so that everyone working here feels like they truly belong Our first step is for D&I to take root in the thoughts and actions of all members at Mercari.