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Software Engineer, Frontend [Mercoin]

Software Engineer, Frontend [Mercoin]



Software Engineer, Frontend [Mercoin]


Details of the offer


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

On April 28, 2021, Mercari Group established Mercoin, Inc. Mercoin is a new company developing services related to cryptoassets and blockchain technologies. By taking on the cryptoasset business, we will make it even easier for users to utilize financial services within the Mercari marketplace app, such as by allowing users to receive payment for Mercari sales in bitcoin and providing a single wallet function that incorporates not only Merpay’s payment and remittance services, but credit, cryptoassets, and asset management features as well.

Mercari has also started work on blockchain technologies, which present new opportunities for individuals to exchange value. The company wants to redefine what it means to buy and sell, enabling anyone and everyone to easily exchange value in all its forms—not only as belongings and money, but services and digital content like non-fungible tokens (NFTs).

We are looking to hire a frontend software engineer to develop web applications related to Merpay and Mercoin’s payment and finance services. You will be involved in development of both B2B and B2C applications. Specific work responsibilities include:
Launch new products for Mercoin

Develop application forms for merchants dashboards

Develop merchant support tools

Develop customer support tools

Develop B2C services such as Mercari Web

The development environment is as below:
Programming languages: HTML, CSS, JavaScript (TypeScript, Vue.js, Nuxt)

Infrastructure: Google Cloud Platform (Compute Engine, Kubernetes Engine, App Engine)

Configuration management tools: Terraform

Other: Circle CI, GitHub, Slack, JIRA, Crowi, Spinnaker

Bold Challenges

The Frontend Team works on web development for each of the many various projects and goals Merpay and Mercoin are working to make a reality. As a member of Merpay and Mercoin’s Frontend Team, you will be given many opportunities to work on development of the product.

Due to the nature of our service, our payment and finance applications are required to have high security, performance and accessibility. You will be required to work not only on feature development but also on non-feature requirements such as improving quality by applying high technical skills to deliver value to our customers at Merpay.

The Merpay/Mercoin Frontend Team uses technologies such as Vue.js, Nuxt.js, and TypeScript for app implementation. We, of course, welcome those with experience using Vue.js or React, but any engineer capable of staying up to speed with the changes in frontend technology and selecting the right tools for the development of our product is equally encouraged to apply.

Required Experience

Has a strong, shared belief in Mercari and Merpay’s missions and values

Ability to use HTML and CSS to implement solid user interfaces

Basic knowledge of performance, accessibility, and security

Understanding of version management and ability to participate in development via Git

Knowledge of JavaScript and experience developing with UI libraries or frameworks such as React, Vue.js, and Angular

Able to understand and explain web operation principles and browsers

Preferred Experience

Extensive knowledge of standard web technologies and specialized knowledge in some areas

Understanding of the characteristics of different libraries/frameworks and the ability to introduce them to projects where necessary

Ability to design architecture based on the characteristics of the app

Ability to consistently take initiative in implementing improvements to the app

Screening Criteria

Capable of going bold and possessing a strong sense of responsibility in regards to their work

Proactive and capable of thinking independently for the good of the team

Possesses excellent communications skills which can push organizations and projects forward

Technical Assessment Criteria

We are looking for individuals who satisfy the criteria listed under the Required Experience and Preferred Experience and are able to contribute to product development using advanced technical knowledge and skills surrounding Web technology.

Language Requirements

English or Japanese: Native level

Related Articles

[Merpay] What is the “Seamless Society” We Envision? (Only available in Japanese)

“The Road We Walk”: Merpay CEO Naoki Aoyagi Talks about Mercari Group’s Foray Into Cryptoassets (Only available in Japanese)

Merpay Frontend’s Past and Future (Only available in Japanese)

A Chat with Engineers Vol.38 @1000ch (Merpay, Software Engineer) Have Time for a Chat?(Only available in Japanese)

“We handle different tasks... but we help each other” A non-isolated team structure found by Mercari Frontend in speed-focused development

Working Conditions

Employment Status

Full-timeProbationary 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 Location

Work Hours

Scheduled working hours: 10 AM – 7 PM

Currently, due to COVID-19 pandemic, we have introduced a full-flex system without core time to increase the choice of working hours and allow for more flexible working styles.(*does not apply to all positions)


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


Annual salary paid in 12 installments (monthly)

Based on skills, experience, and abilities

Reviewed twice a year


Complete health and social insurance

Incentive program

Support systems, including those that benefit employee family members

Language learning support

*See this page for details.


Corporate Sites

Mercari, Inc.

Souzoh, Inc.

Mercari US

Owned Media

Mercari Careers

Mercari Engineering Portal

Mercan - Introduces the people that make Mercari

Mercari US Careers

Mercari US Blog



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