Engineering Manager, Machine Learning

Tokyo, Japan · Engineering · 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.

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.

Job Description

This is a managerial position with a focus on maximizing Mercari’s output through machine learning. The AI/ML team uses technology like artificial intelligence, machine learning, and deep learning to improve Mercari’s UX, with an emphasis on image recognition, NLP, and algorithms for recommendations. With ML engineers from a wide variety of backgrounds, the team aims to use its diversity to make even greater achievements.

One particular challenge you will take on is conducting research using data consisting of over 1 billion image and text items on Mercari. You will also conduct research and experiments at high speeds, developing an independent ML platform to allow for the release of a stable model.


・Maximizing AI/ML team members’ output and encouraging career growth

・Creating strategies for keeping up with the latest trends in AI/ML fields

・Providing communication and feedback to engineers through quarterly evaluations and goal-setting, as well as through periodic 1-on-1 meetings

・Keeping engineers’ career goals in mind and providing them with assignments that will help them achieve success

・Assigning members to projects and providing any necessary communication support

・Hiring, training, and conducting PR activities to scale the engineering team



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

メルカリのEngineering組織では、「変化と挑戦を繰り返し続ける」「協力しあえる、共創できる」「多様性があり、自由度の高い選択肢がある」「オーナーシップを持ち、自ら決断をして進めることができる」組織を作り、常に大きな成果を生み出し続けることを目指しています。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。


メルカリのMachine Learningチームの成果を最大化することを主眼においたマネジメント業務となります。メルカリのAI/MLのチームでは人工知能、機械学習、ディープラーニング技術を用いたメルカリのUX改善に取り組んでおり、特に画像認識やNLP、レコメンド等のアルゴリズムを中心に応用しています。様々なバックグラウンドのMLエンジニアで構成されており、多様性を活かしてより大きな成果を目指します。

AI/ML分野においては10億を超える画像やテキストデータを用いることができ、チャレンジングな研究に取り組めます。さらには様々な研究や実験を高速に繰り返し、安定したモデルのリリースができるように独自のML Platform開発にも取り組んでいます。









Minimum Requirements

・Professional knowledge of AI/ML (with specialization in at least one field such as image recognition or natural language processing)

・Hands-on experience with ML modeling or development experience with ML systems

・Experience as a manager for engineers or researchers

・English communication abilities


・Experience writing articles/theses in AI/ML fields

・Experience creating ML models using large-scale data

・Experience training AI/ML engineers and/or researchers

・Experience hiring AI/ML engineers and/or researchers

・Japanese communications abilities

Our Ideal Candidate

・Service-oriented with a desire to use AI/ML to provide users with a fun and memorable experience

・Excited to take on new challenges and break out of existing methods

・Able to communicate proactively in a global environment

・Excited to experience personal growth and the growth of team members


















Contract Type


 Probationary Period: 3 months (salary same as above)



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













・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











Engineering Manager Drink Meet-up記事


Looking for something but don’t know what it’s called? Mercari’s image search feature is here to help

「メルカリAI技術説明会」を開催しました! #メルカリな日々

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