Senior Backend Engineer || シニアバックエンドエンジニア

Company Overview
国内外において、Eコマースを中核に、トラベル、デジタルコンテンツ、
通信などのインターネットサービス、クレジットカードをはじめ、銀行、証券、保険、
電子マネーなどのFinTech（金融）サービス、さらにプロスポーツといった多岐にわたる
分野でサービスを提供しています。
現在、70を超えるサービスを展開し、世界10億以上のユーザーに利用されています。
社内は英語環境ですので英語力を活かせる環境です。

Job Description
- In collaboration with team members, product managers, front-end engineers, and related groups within the Rakuten Group (payment, points, members), etc., develop APIs for foreign tourists visiting Japan who will reach 40 million in 2020. ・ In charge of operation , leading to successful early renewal of existing sites that handle large-scale traffic.
- After the renewal of the existing site, continuous API of functional improvement, performance tuning, monitoring , alert response and , technical support engineers and while cooperation inquiry from the user conducted a survey solve the problem to.
- Become a role model for next-generation engineers with solid technical capabilities, and drive organizational growth.

Requirements
-Large-scale Web API development and operation experience using Java and Spring Framework
-Development and operation experience in Linux environment
-Table design / query creation experience for efficient use of RDBMS such as Oracle
-Experience in distributed development with several teams using GitHub / Bitbucket or similar version control system and Pull Request
-Code and design review work experience
-Architecture of improvement record , Ju Ningu, improvement by the performance analysis experience
-Web application operation / tuning experience, security knowledge
-Experience in software architecture design and middleware selection
-Work experience in development using automated tests such as xUnit / xSpec
-Able to implement application considering database schema design and system linkage

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