Data Scientist

Job Type
6,000,000 JPY - 10,000,000 JPY per year
Japanese Level
English Level
Advanced (TOEIC 860)
Start Date


A large Internet service group is hiring a Data Scientist. They provide more than 70 services, such as ecommerce, payment services, financial services, telecommunication, media, sports, etc.

They are a data-driven membership company, and are expanding their data activities across their multiple group companies. They are looking for a Data Scientist to work within one of the following departments:

- Commerce company (gathering data for our Ecommerce businesses)
- FinTech company (gathering data for our insurance, banking, and securities businesses)
- Global Data Supervisory Department (develop high tech data products and delivering internal data consulting)



- コマースカンパニー(eコマースサービス)
- フィンテックカンパニー(保険、銀行、証券など)
- グローバルデータ統括部(データを活用した製品を開発する部門)

【会社概要 | Company Details】

Our client is a large global Internet service company that has enjoyed sustained growth as they continue to expand their business in various new areas and industries. This is a great opportunity to work in a diverse and international environment in Japan. Our client actively strives to be an equal opportunity employer, and they have many female and foreign nationals in upper management positions. Their brand has also gained global recognition as they sponsor some of the world's most famous sports teams. Our client prides themselves in providing a comfortable working environment for their employees. Engineers are welcome to choose their own setup (Windows/Mac, etc.); whatever makes them comfortable! Free meals are also provided at the company cafeteria. Their chefs work to create exciting new menus and dishes, so employees never get tired of the food!
【就業時間 | Working Hours】
9:00 - 17:30(Mon - Fri)
【休日休暇 | Holidays】
Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays
【待遇・福利厚生 | Services / Benefits】

各種社会保険完備(厚生年金保険、健康保険、労災保険、雇用保険)、 屋内原則禁煙(屋外に喫煙所あり)、 通勤交通費支給等

Social insurance, Transportation Fee, No smoking indoors allowed (Designated smoking area), etc.

Required Skills

- Relevant work experience in data analysis or related areas
- Solid understanding of foundational statistics concepts and ML algorithms: linear/logistic regression, random forest, boosting, GBM, NNs, etc.
- Experience building data science solutions for real business problems
- Skilled in self-directed exploratory data analysis
- Passion for learning (new problem domains, algorithms, tools etc) and for analyzing data
- Fluency in using R or Python (pandas, scikit-learn or equivalent tools) for data analysis
- Experience with working on large data sets, especially with Hadoop and Spark, or cloud platforms such as AWS and Azure.
- Ability to extract, combine and analyze complex datasets using SQL

- 基礎統計学と機械学習、線形/多重回帰、ランダムフォレスト、ブースティング、GBM、NNなどの理解があること
- データアナリシス関連の業務経験を有すること
- 実際のビジネス課題に対するデータサイエンスソリューションの構築経験を有すること
- 新たな課題/アルゴリズム/ツール、およびデータ分析への強い興味を有すること
- Python、Java、Scala、C/C++、Ruby、R、最低いずれか1つを充分に習得していること
- HadoopとSparkによる大量データの取り扱い経験を有すること
- SQL/NoSQLを使った複雑なデータのアクセス、管理、転送、統合、分析のスキルを有すること
- scikit-learnとPandas(もしくは同種のツール)の使用経験を有すること

Preferred Skills

- Industry experience especially in digital marketing, e-commerce or customer analytics-related fields
- Experience with GPU usage
- Experience integrating and analyzing data from multiple sources (e.g. first party + third party)
- Experience with automation and/or working with Data Engineers, Software Engineers, etc. in integrating analysis results and models into production systems
- Experience in client relationship management such as consulting or sales

- HMM、CRF、MRF、ディープラーニング、正則化などといった先端機械学習のモデルおよびコンセプトの経験を有すること
- デジタルマーケティングやフィンテック分野の勤務経験があること
- HBase、Redis、CouchBaseなどの分散データベースの使用経験を有すること
- GCP、AWSなどのクラウドコンピューティングプラットフォームの使用経験を有すること
- GPU利用経験を有すること
- コンサルティングやセールスなどのクライアントビジネスの経験を有すること