API Development Engineer (API for Rakuten Ichiba stores) Senior Class

Application deadline date has been passed for this Job.
Full-Time Employee
  • Post Date: 2019-09-03
  • Career Level Programmer
  • Offerd Salary ¥6 - ¥8 Million
  • Experience 7 Years
  • Number of employee 1
  • Gender Required Both
  • INDUSTRY Internet & Gaming
  • Qualification Bachelor Degree
  • Working Hour 09: 00〜18: 00
  • Trial Period 3 Months
  • Department Assign Commerce Company (Rakuten Ichiba)
Job Description

The service scale of Rakuten Ichiba boasts overwhelming numbers compared to other companies, with 40,000 stores, 140 million items, and an annual circulation of 1.4 trillion yen. In the 20th year, for further growth, there is an urgent need to develop an e-commerce platform that will be deployed on a global scale and responsible for the next generation. 

We are looking for high-skilled senior API engineers who are indispensable to develop and build Core API, a solid back-end system that is the foundation of a large, high-performance, high-availability, high-scalability e-commerce platform. 

As a senior API engineer, you will be responsible for quality assurance and availability from new API development to service operation, assuming “You build it, you run it”. In addition to understanding functional requirements and system requirements, it is also necessary to understand service specifications for existing e-commerce services. 

This position is self-motivated and requires the ability to design and implement with high performance, high availability, and high scalability. 

As a senior API engineer, the ability to communicate with architects, product managers, and other software engineers is also required to make decisions about product direction, function requirements, and API provision. 

The number of users around the world, the opportunity to develop and operate the Core API to handle traffic is rare, it is very rewarding and it is an invaluable experience as an engineer. 

[Required scope of responsibility] 

-Design and implementation with excellent readability, versatility, and maintainability-Implementation of unit tests with high coverage rate

– Quality by design, implementation, design, and code review with excellent high performance, high availability, and high scalability 

Providing optimal solutions to solve collateral, platform optimization, bottlenecks, bugs, API documentation, research and learning of new technologies to provide better design and solutions

Treatment conditions and salary bonus

Determined based on experience and ability. 

Salary revision twice a year (June-December) 

(paid by the company and individuals in June-December performance. Joined time pro-rata basis in accordance with the) performance bonuses twice a year 

commuting expenses



・ Commutation transportation expenses 

・ Employee shareholding system 

・ Sports club corporation members 

・ Visa support 

・ Relocation support 

・ Support support for balancing work and childcare and nursing care 


・ Cafeteria (free breakfast, lunch and dinner) 

・ Library ( Personal study space) 

・ Convenience store 

・ Crimson club (paid restaurant) 

・ Fitness gym “Rakuten Fitness Club & Spa” (pay) 

・ Hair salon “Rakuten Hair Salon” (pay) 

・ Laundry service “Rakuten Cleaning” (pay) 

・ Massage & Acupuncture “HARI-UP” (charged) 


・ Club activities 

・ Non – membership 

・ Family Day

Selection process

Document selection → Primary interview: Department member → Secondary interview: General manager of the composition department → Third interview: Managing director → Appointment 

(It seems that you may meet other members before the interview with the managing director) 

* There is an SPI test 

* The number of interviews is 3-4 times. 

* The selection process is subject to change.


2 days a week (Saturday / Sunday), Holidays, Summer / New Year holidays, Gyeongsang vacation, Paid holidays