Engineering Manager, Machine Learning

Tokyo, Japan · Engineering · EN/JP


▼Our Mission

Mercari is in the process of strengthening our engineering organization as part of our efforts to become a world-class tech company.

In order to achieve our goal of creating an outstanding team of 1,000 engineers over the next 3 years, we are placing a heavy emphasis on hiring and training new members while also creating an environment that allows engineers to work to the best of their ability. To make this possible, we need highly skilled engineering managers to work with us.

With a strong team of engineering managers and engineers, we aim to become a tech company that can solve society’s problems using technology and work towards Mercari’s mission of creating value in a global marketplace where anyone can buy & sell.

▼Our Values (Go Bold, All for One, Be Professional)

The path to creating a leading global marketplace is not without challenges. In order to create new and innovative solutions, all members must take advantage of their unique skill sets and have a sense of responsibility and ownership for their work. We are looking for new members to join us in achieving this goal under our values - Go Bold, All for One, and Be Professional.



「3年で1,000人規模の優秀なエンジニアリング組織」を作るために、エンジニアを採用・育成して仲間を増やすことと、エンジニアリングに集中できる環境を作ることを同時にGo Boldに行う必要があります。そして、これを実現するためには優秀なエンジニアリングマネージャーも同様に不可欠の存在であると考えます。


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

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。このことを達成するために我々は3つのバリュー(Go Bold, All for One, Be Professional) 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。

▼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.

Mercari has been downloaded about 75 million times in Japan and has about 10.75 million monthly users. One particular challenge you will take on is conducting research using data consisting of over 1 billion image and text items. 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


メルカリのMachine Learning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。

現在メルカリは、国内約7,500万DL、月間利用者数は1,075万人と非常に多くのお客様に利用いただいています。特に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

▼ Preferred

・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

▼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


・5-day work week (Sat/Sun off)

・National holidays, paid time off, summer/New Year's vacation, congratulatory leave, compassionate 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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