AI-Driven Engineer (Front-end & Back-end) - IT Division, Rakuten Securities, Inc.(Secondment)
Rakuten2 months ago
Tokyo, JapanSenior
Responsibilities
- Modernize front-end development for Web services and mobile apps using AI-assisted component design and UI implementation.
- Integrate AI-assisted design, legacy-code analysis, documentation, specification checks, and automated testing into back-end and core-system development.
- Optimize development workflows with development partners while ensuring the quality and robustness of AI-generated code.
- Deploy AI-driven development practices across the organization through knowledge sharing, effective prompts, workshops, and technical enablement.
- Evaluate new AI tools and libraries and prototype improvements for production use.
- Collaborate with engineers and development partners to introduce AI into high-security, large-scale financial infrastructure.
Requirements
- At least 5 years of practical software engineering experience.
- Experience designing and implementing Web or mobile app front-end or back-end systems.
- A proven record of autonomously optimizing development processes and solving technical challenges beyond writing code.
- Practical coding, refactoring, and test-generation experience with AI development tools such as GitHub Copilot, Cursor, or ChatGPT.
- Ability to quickly learn and validate new technologies and apply them to business problems.
- Deep understanding of the software development lifecycle, CI/CD, and automated testing, including AI-based efficiency and automation.
- Financial or securities-system development experience is preferred.
- Practical AI-driven development experience, including test automation, documentation automation, or AI-agent workflow construction, is preferred.
- Project leadership or team-management experience is preferred.
- Experience with Docker or Kubernetes and Terraform or Ansible for infrastructure and environment automation is preferred.
- TOEIC score exceeding 800; applicants without a current score must obtain one after joining.
- Advanced English and fluent Japanese language proficiency are stated.
Benefits
- The position is based at Rakuten Crimson House Aoyama in Minato-ku, Tokyo.
- The engineer is seconded from Rakuten Group, Inc. to Rakuten Securities, Inc.
- GitHub Copilot is standardized for engineers, Cursor is encouraged, and a secure internal LLM environment is available.
- The environment uses hybrid AWS, Azure, and GCP infrastructure with Terraform, Ansible, and GitHub Actions automation.
- The team uses Jira, Confluence, Miro, and Slack for development and project management.
Tech Stack
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.