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Senior Software Engineer (Tech Lead) - Ad Product Section, Global Ad Technology Supervisory Department (GATD)

Tokyo, Japan💼 Full-time🗓 2026-07-03 → 2026-07-31

Core

Full-stack software engineer leading ad product development and system design for Rakuten's global advertising ecosystem.

Role type

Senior IC full-stack software engineer (tech lead)

Builds

Robust ad products and technology clusters within Rakuten's e-commerce ecosystem

Domain

E-commerce advertising technology

Deliverable

production ML models | product features

Required skills

Java Spring Boot, MySQL, NoSQL (MongoDB), Kafka, GCS, BigQuery, Dataproc, Git, Jira, system design, Agile/SCRUM, AI tool usage (Cursor)

Preferred skills

Big Data (Hadoop, Hive, Spark), REACT, ANGULAR, NoSQL (Couchbase, Cassandra, Redis), Test Automation (JUnit), CI/CD (Jenkins), BI Tools (MicroStrategy, Tableau), enterprise system architecture

Technologies

Java, Spring Boot, MySQL, MongoDB, Kafka, GCS, BigQuery, Dataproc, Git, Jira, Hadoop, Hive, Spark, REACT, ANGULAR, Couchbase, Cassandra, Redis, JUnit, Jenkins, MicroStrategy, Tableau

Responsibilities

Gather and analyze business requirements, convert requirements to technical specs, design systems, code and implement features, conduct code reviews, perform unit testing and validation, manage deployment and rollback operations, monitor post-release performance, collaborate with QA and DevOps teams, suggest technical improvements and future roadmaps

Seniority

Senior, hands-on IC with technical leadership

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