Software Engineer, Machine Learning [US App]

Tokyo
Remote OK - Anywhere in Japan
Full-time
June 9, 2022

Position Overview

Work Responsibilities

Design, build and maintain machine learning systems to improve customer experience and optimize our service operations.
Utilize a massive amount of data with artificial intelligence, natural language processing and computer vision technologies for user understanding and item understanding
In addition to building machine learning models, you will be responsible for microservice development to integrate the models into the Mercari App

Bold Challenges

You will work with a great team based in Tokyo, and also collaborate with many teammates across the US. Working globally with a diverse team, we’re all-in to help people in the US buy and sell on Mercari, while getting ready for whatever comes next.
Use the right technology at the right place. In the machine learning teams at Mercari, we don’t hesitate to use traditional machine learning technologies for our services, especially at the early stage of projects. After we confirm that a feature is useful for our users, we will use advanced models and technologies with more data.

Required Experience

Shared belief in Mercari’s mission and values
3+ years experience in developing industrial applications with Python
Experience in machine learning product development with million to billion-scale data using some machine learning libraries and frameworks such as TensorFlow, PyTorch or scikit-learn
Experience working on end-to-end development of backend systems
Strong communication and interpersonal skills

Preferred Experience

Experience designing a system architecture to serve a machine learning model at scale
Experience working with Kubernetes, Docker, or other forms of containerized infrastructure
Familiarity with cloud-based environments such as Google Cloud Platform, Amazon Web Services
Good knowledge of distributed data processing technologies
Experience with infrastructure as code tools such as Terraform, Ansible

Screening Criteria

Please provide your resume in English.
We will conduct interviews in English,
Hiring Process Overview (subject to change)
- 1. Doc Screening
- 2. Skill Test
- 3. Interviews (3-4 rounds. There are some cases you will meet a few members in 1 round)
- 4. Background check
- 5. Offer
- 6. Hire

*Check here for more details

Language Requirements

English: Independent (CEFR - B2)
Japanese: Basic (CEFR - A2) optional

　　*For details about CEFR, see here

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.

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About Mercari

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

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.

Japanese Language Policy
Mercari doesn’t require Japanese skills 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.

Mercari believes that it’s essential for team members to meet halfway during daily communications. They use the CEFR Framework to understand language levels and guide members in improving their skills. See more info on CEFR here.
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 currently operates on a hybrid model, combining both office and remote work.
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.