Software Engineer, Android [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

As a member of the Mobile team, you will work as an Android professional to promote Mercari’s business and maximize project output.

Mercari has been downloaded about 75 million times in Japan and has about 10.75 million monthly users. Mercari’s mobile team is currently working on a major re-architecture of the Android/iOS apps in order to create a structure where they can conduct further large-scale development while maintaining speed and security. The team is also working on various other projects, such as developing new features and improving the UX.

Merpay is looking for Android engineers who are passionate about changing society with engineering and working towards the mission “Building trust for a seamless society”. While we are currently developing products for the financial industry, we are considering other industries where we can use technology to upgrade social infrastructure.

As Merpay’s projects are still at an early stage, you will be expected to have the expertise to comment on specifications from a technical perspective and select design methods with scalability in mind.Additionally, you will work with a team to improve the UX and specs from the perspective of the customer, with the aim of creating a better product.

The mobile team consists of members from many different countries; we hope to unlock the potential of this diverse team in order to make even greater achievements.



・Improving Mercari’s UI/UX

・Improving quality with a focus on stability and performance

・Continuous improvement of the codebase, including the major re-architecture

・Handling updates for the Android app

・Developing new services and linking them with other services


・Developing for Merpay’s native Android app

・Designing and developing our payment module and contributing to integration with Mercari

・Designing and implementing APIs with the backend (new microservices) teams

・Developing as part of a team alongside product managers, designers, and QA

・Continuous improvement of the codebase, including the major re-architecture

・Handling updates for the Android app

▼ About Mercari & Merpay’s Android Teams

Mercari and Merpay’s Android Teams consist of members coming from very diverse backgrounds, featuring an environment buzzing with English conversations.

The development environment allows members to work on the client app as part of a large team, conducting large-scale development on a service used by countless people.

In addition, there are endless opportunities to receive code reviews from highly experienced members and benefit from significant personal growth.

The company proactively provides support to members who wish to participate in international conferences and learn about the latest technology.

▼Languages and technologies we use


・Software development: Kotlin, Java

・Network transport: Protocol buffers

・Build Environment: Gradle

・Day to day development: LeakCanary, Dagger, and okhttp

・UI Testing: Espresso


・Language: Kotlin

・Technical Environment: Android Studio、GitHub、Slack

・Configuration management tool:Gradle

・Others:Bitrise、Circle CI、Sketch、InVision、JIRA、Crowi


メルカリ・メルペイの事業を推進していくために、Mobile チームの一員、とくにAndroidのプロフェッショナルとして、プロジェクトの成果を最大化することにコミットしていただきます。


















▼メルカリ/メルペイ Androidチームについて

メルカリ/メルペイ Androidチームには様々なバックグラウンドを持った社員が集まっており、英語での会話が飛び交うようなグローバルな環境となっています。












・開発言語: Kotlin

・開発環境: Android Studio、GitHub、Slack

・構成管理ツール: Gradle

・その他:Bitrise、Circle CI、Sketch、InVision、JIRA、Crowi


▼ Entry 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 using Java and/or Kotlin for developing native Android apps

▼ Preferred

・Experience developing and operating native apps with large user bases

・Experience independently planning, developing, and operating apps

・Experience background in UI/UX design

・Knowledge of standard Android libraries and frameworks

・Knowledge of performance optimization

・Experience working on mobile application development collaboratively with teammates

・Experience using and implementing Jetpack features such as Android Architecture Components

・Knowledge and understanding of security programming

・Experience publishing and contributing to open source software (e.g. creating an issue, pull request, or doing maintenance)

▼ 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












・Android Architecture ComponentsをはじめとしたJetpackの機能利用・導入経験








▼ 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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