Senior Backend Software Engineer, Booking Services Search Group - Search Department (SED)

Rakuten Group, Inc.

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Tokyo, Japan Until 8/22/2026 H-1B sponsor history First posted March 27, 2025 Last posted March 27, 2025
Job description

Job Description:

Business Overview

Rakuten Group, Inc. is the largest e-Commerce company in Japan, and provides a variety of services in e-commerce, fintech, digital content and communications to many users all over the world.

Department Overview

Search Department focuses on Search, Discovery, and Navigation experience for users of Rakuten. We design, develop, and deploy high performance, fault-tolerant distributed systems used by millions of Rakuten customers every day. We strive to deliver the most innovative solutions that are helpful to people and societies around the world.

Position:

Why We Hire

We are looking for a senior backend software engineer to work on core search system development. The role will build the state-of-the-art search systems, propelling the fast iteration of search development.

Position Details

- Support fast iterations of Rakuten search business and further enable the product growth.

- Build a fast and robust Search product by keeping optimizing system performance and improving service stability.

- Construct a high freshness index and provide a reliable offline data support for Search Engine.

- Guarantee reasonable Search architecture governance to ensure that the overall system operates smoothly.

Mandatory Qualifications:

- BS degree in Computer Science, Computer Engineering, or other relevant majors with minimum 3-5 years of experience in either backend service development or data engineering domain. 

- Strong programming skills and solid knowledge in data structure and algorithm.  

- Good understanding of operating system and networking concepts.  

- Hands-on experience with at least one data processing framework (e.g., Hadoop, Spark, Flink, etc)  

- Knowledge in database (be it relational or KV-like) is a plus.  

- A strong problem-solving mindset and good communication skills.  

- Self-motivated and a team player.   

Desired Qualifications:

- Good understanding on how modern Search system is built or/and how modern Search product should be evolved.

- Industry experience in building a consumer-facing Search product.

- Japanese speaking and reading capability is good to have.

#engineer #applicationsengineer #aianddatadiv 

About this role

Summary

Develop high-performance, fault-tolerant search systems for Rakuten's online platform.

Job title

Senior Backend Software Engineer, Booking Services Search Group - Search Department (SED)

Experience level

3-5 years

Industry

e-commerce

Location requirements

Tokyo, Japan; remote work not specified

Salary

Not specified

Visa sponsorship

H-1B sponsor history

Management role

No

Skills & keywords

Required skills

programmingdata structuresalgorithmsoperating systemsnetworkingdata processing frameworks

Preferred skills

search systemsconsumer-facing searchJapanese language

Specializations

backendsearchdistributed systemsdata processing
Locations

Structured locations inferred from the posting.

Tokyo, Japan

Work arrangement unknown City