Software Engineer, Frontend [New Graduate Position]

Tokyo, Japan · Student Recruitment · EN/JP


(Japanese follows English)

▼ Our mission

We are always looking for new challenges to help us fulfill our mission to create value in a global marketplace where anyone can buy & sell.

The world is full of objects and services being produced and sold, but many of them are thrown away without people realizing that they might be valuable to someone else, wasting valuable natural resources. To contribute towards eliminating waste, we have launched Mercari, a marketplace where people can buy and sell easily and safely, in Japan and the United States.

Merpay’s mission is to build trust for a seamless society. Our aim is to change the way money is circulated, establish a Merpay that provides all kinds of services, and develop a world where everyone can enjoy peace of mind.

Merpay aims to bring liquidity and innovation to the world of finance, and create new value not just for consumers, but for businesses as well.

▼ Our three values (Go Bold, All for One, Be a Pro)

We work together to create a global marketplace, but the road to this goal is by no means easy. In order for us to make new innovations and take on new challenges that no one has taken before, all of us take ownership of our work and make use of our knowledge so that we can create the best product possible as one team. To achieve this, we all take action based on our three company values (Go Bold, All for One, and Be a Pro).

▼ The goal of the engineering organization

At Mercari, engineering teams always strive to continuously produce significant results. To do this, our organization constantly welcomes changes and new challenges, cooperates and co-creates, is diverse, offers freedom, and encourages all of us to take ownership and make our own decisions. We want to continue taking on new challenges, working together as one team, going bold, and taking ownership so that we can grow individually, while working toward the realization of Mercari’s mission.



世の中では多くのモノ・サービスが生産・販売されていますが、誰かには価値があるのに捨ててしまうなど地球資源の無駄になっていることが多いと私たちは考えています。 「捨てる」をなくすために、個人間で簡単かつ安全にモノを売買できるフリマアプリ「メルカリ」を日本とアメリカで展開しています。




▼ 3つのバリュー(Go Bold, All for One, Be a Pro)

世界的なマーケットプレイスを創るために我々は集まっていますが、この目標への道のりは決して平坦ではありません。まだ誰も挑戦したことのないようなイノベーションや破壊的な創造を起こすため、我々は各自がオーナーシップを持ち、専門的能力を発揮することで、メルカリというチームとして最高のプロダクトを創ります。これを達成するために我々は3つのバリュー(Go Bold, All for One, Be a Pro) という全社員が共有する行動指針のもと行動しています。

▼ Engineering 組織が目指すもの


チーム一丸となり、Go Boldにオーナーシップを発揮して個が成長し、メルカリのミッションの実現に向けた挑戦をし続けていきます。

▼Job Description

Software engineers in Mercari and Merpay’s Frontend Team will work in a highly diverse environment, utilizing their exceptional engineering skills to develop successful products.

Because we expect our products to be accessed from a wide variety of network environments and devices, it is essential to plan and develop architecture that can handle expansion and change brought by new features.

Software engineers will also train their team members through design and code reviews.

Additionally, it will be necessary to have design skills for handling linkage points with the backend and native app, along with the ability to smoothly communicate with engineers in other fields.These are some ways in which senior engineers are expected to lead their team members.

▼ About Mercari & Merpay’s Frontend Teams

Frontend engineers will work on the development of the web app and native app, being responsible for transaction screens and coupons, customer support tools used for handling user inquiries and providing transaction support, support tools for handling inquiries from Merpay merchants, the dashboard provided to Merpay merchants, the Mercari Guide, Mercari Box, and all web technology involved in Mercari’s products.

▼ Technical environment


・Development languages: HTML, CSS, JavaScript (TypeScript, React.js, Next.js, Redux etc)

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

・Configuration management tool:Terraform

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


・Development languages: HTML, CSS, JavaScript (TypeScript, Vue.js, Nuxt)

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

・Configuration management tool:Terraform

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


メルカリ・メルペイの Frontendチームのソフトウェアエンジニアは、多様性のあるエンジニアリング組織の中で、特に優秀なエンジニアリング能力を発揮し、プロダクト開発を成功に導くことが求められます。





▼メルカリ/メルペイ Frontendチームについて

メルカリ・メルペイの Frontend チームは、 ネイティブアプリを含む広義の Frontend ではなく、JavaScript / HTML / CSS で構成されるいわゆる Web Frontend の技術を駆使して開発を続けているチームです。昨今の PWA や SPA / SSR などに対する注目の高まりを受けて、今私達はメルカリグループ内でのよりモダンな Web 技術をベースにしたプロダクト開発を強化しようと取り組んでいます。

主な開発範囲としては、メルカリの Web アプリ、ネイティブアプリ内で呼び出される取引画面やクーポン機能、お客さまのお問い合わせや取引のサポートをするカスタマーサポートツール、メルペイの加盟店さまのお問い合わせをサポートする加盟店サポートツール、メルペイの加盟店さまに提供するダッシュボード、メルカリガイド、メルカリBoxなど、メルカリのプロダクトに関わる全てのWeb技術を使った製品に責任を持ちます。私達はこれらのプロダクトを通して、持続可能なメルカリグループの成長に貢献しています。

現時点でチームは20名程度で、約半数が English Speaker です。我々は着実に世界的な企業になる事も見据えた上での組織設計を続けています。





・開発言語: HTML, CSS, JavaScript (TypeScript, React.js, Next.js, Redux etc)

・インフラ: Google Cloud Platform (Compute Engine, Kubernetes Engine, App Engine)

・構成管理ツール: Terraform

・その他:Circle CI, GitHub, Slack, JIRA, Crowi, Spinnaker


・開発言語: HTML, CSS, JavaScript (TypeScript, Vue.js, Nuxt)

・インフラ: Google Cloud Platform (Compute Engine, Kubernetes Engine, App Engine)

・構成管理ツール: Terraform

・その他:Circle CI, GitHub, Slack, JIRA, Crowi, Spinnaker


▼ Minimum Requirements

・Shared belief in Mercari and Merpay’s mission and values

・Candidate must be a student over 16 years old who will be available to join the company after 2020

・Experience developing/operating products

・Experience with UI implementation using HTML and CSS

・Extensive knowledge on the fundamentals of performance, accessibility, and security, along with the ability to design and develop while considering factors like performance and scalability

・Experience developing with frameworks like React, AngularJS, and Vue.js

・Ability to understand and explain web operation principles and browsers

▼ Preferred

・Experience launching new services and dealing with challenges faced by growing services

・Experience with development and operation within a microservice architecture

・Experience with team-based development using scrums

・Contributions to the industry through work on OSS projects

・Experience presenting at technical conferences or study sessions

▼ Our Ideal Candidate

・A skilled communicator capable of offering valuable insight in team discussions

・Capable of taking on bold challenges and learning from mistakes

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

・Eager to gain new knowledge and ready to proactively challenge themselves using the newest technologies

▼ Language Ability

・Business level English or Japanese



















▼ 求める人物像





▼ 言語能力



▼Employment status

・Full Time

Probationary Period: 3 months (salary same as above)

*We hold an orientation for new graduates every April and October


・Roppongi Hills Mori Tower 6-10-1 Roppongi Minato-ku Tokyo 106-6118

▼Work Hours

・Fixed working hours 10:00-19:00

・Flex time (core hours 12:00-16:00, 60 minute lunch)


・Annual salary, paid monthly

・Based on your experience, skills and potential

・Reviewed twice a year


・Two days off per week, Japanese national holidays, New Year's vacation etc.

・Paid Leave, Bereavement Leave, Relax Days, Sick Leave









 フレックスタイム制度あり(コアタイム:12:00~16:00 [休憩60分] )







・完全週休2日制(祝祭日、年末年始 等)

・有給休暇、慶弔休暇、リラックス休暇、Sick Leave


・Health insurance

・Incentive program

・Employee stock ownership plan

・Full transportation coverage

・Custom PC

・Dual screen if needed

・Company smartphone

・Visa support

・New Employee Benefits at Mercari「mercibox











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