Senior Backend Software Engineer, Booking Services Search Group - Search Department (SED)
LocationTokyo, Japan
Typefull-time
SenioritySenior
Experience3–5 yrs
DepartmentSearch Department
Company size10,000+ people
First seenOct 6, 2026 · 5d ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Must have7
BS degree in Computer Science, Computer Engineering, or other relevant majors
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)
A strong problem-solving mindset and good communication skills
Self-motivated and a team player
Nice to have4
Knowledge in database (be it relational or KV-like) is a plus
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
Skills
Hadoop
Spark
Flink
data structure
algorithm
operating system
networking
database
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.