Senior Web Application Engineer (GORA) - Life & Leisure Service Development Department (LLSD)
Rakuten24 hours ago
Tokyo, JapanSenior
Responsibilities
- Design and build features across the Rakuten GORA golf reservation platform.
- Develop API endpoints and maintain batch jobs supporting asynchronous data pipelines.
- Work across the full stack from database schema and REST contracts to integration tests.
- Contribute to platform migrations and maintain scalable microservice-based systems.
- Take end-to-end ownership of production-quality features and maintained systems.
- Build CI/CD and GitOps systems and support monitoring and infrastructure practices.
Requirements
- At least 5 years of web application development experience using Java or Kotlin and Spring Boot.
- Strong knowledge and experience with RDBMS technologies including MySQL, PostgreSQL, or MariaDB.
- Experience with Kafka, Kubernetes, Docker, Helm, and at least one of AWS, GCP, or Azure.
- Experience building CI/CD and GitOps systems from scratch using tools such as GitHub Actions, Argo CD, or Argo Workflows.
- Experience using AI development tools such as Claude Code or Codex.
- Business-level English proficiency; TOEIC score of 800 or equivalent is specified.
- Preferred experience with microservice architecture, design patterns, technical leadership or architecture in large organizations, long-term system lifecycle management, infrastructure as code, and monitoring tools such as Prometheus, ELK, or PagerDuty.
Tech Stack
Apache KafkaArgo CDAWSAzureDockerGitHub ActionsGoogle Cloud PlatformHelmJavaKotlinKubernetesMariaDBMySQLPostgreSQLPrometheusSpring Boot
Categories
About Rakuten
Rakuten Group builds e-commerce marketplaces, financial services (credit cards, payments, banking, securities), and digital/communications offerings for consumers and merchants worldwide. It monetizes through transaction fees, financial services income, advertising, and mobile subscriptions; flagship businesses include Rakuten Ichiba, Rakuten Card, and Rakuten Mobile. Founded in 1997 and headquartered in Setagaya, Tokyo, the company is publicly listed on the Tokyo Stock Exchange and operates across many countries and regions.