Infrastructure Engineer, Modernization Lead (Manager Candidate) - IT Division, Rakuten Securities, Inc.(Secondment)

Job Description:

Business Overview
Mission: Innovating Asset Building - Creating the Future as the Financial Hub of the Rakuten Ecosystem.
Rakuten Securities is a core internet brokerage firm within the Rakuten Group, which operates over 70 services globally. Our goal goes beyond providing financial products; we aim to merge the Rakuten Ecosystem's vast data with cutting-edge technology to transform "asset building" into a seamless, everyday activity for everyone.
- Fusion of User Base and Technology: By seamlessly connecting the Rakuten Ecosystem's extensive data with financial services, we create unique user experiences unmatched by traditional brokerages. We continue to set new industry standards through asset formation support (NISA, iDeCo), AI-driven investment solutions, and partnerships with IFAs.
- The Frontline of Transformation: We are currently undertaking a massive core system overhaul alongside a radical reconstruction of our "next-generation development process" based on AI. We are in an exciting phase for engineers and PMs, involving legacy modernization and the evolution of AI-driven development styles.
- Responsibility and Authority: We maintain the robustness of critical social infrastructure while realizing high-speed new development. Rakuten Securities offers the unique opportunity to achieve this difficult balance using the group's solid network and the latest technology stack.

Department Overview
Mission: Safeguarding the Heart of "Asset Building" - At the Forefront of Engineering the Future of Financial Infrastructure.
Our mission is to keep Rakuten Securities' service infrastructure, serving 14 million accounts, evolving 24/7. We oversee the design, construction, and operation of large-scale infrastructure that demands extreme availability - from mission-critical core databases like Oracle Exadata to our expanding cloud environments. We are not just maintaining systems; we are building a "proactive foundation" that drives business growth.
- Responsibility for Large-Scale Financial Infrastructure: Optimize performance and scalability while maintaining robustness for core systems supporting massive transactions.
- Beyond Maintenance to Infrastructure Modernization: Promote IaC and operational automation to redefine traditional maintenance. From optimizing hybrid infrastructure to designing new services, we use engineering to realize our "never-stop" responsibility in a smarter, more robust way.

Position:
Why We Hire
We are seeking a leader to redefine "non-stop" financial infrastructure with modern technology.
Rakuten Securities is expanding its user base at an industry-leading pace. As transaction volumes grow exponentially, our infrastructure requires unprecedented robustness and flexibility. We are moving beyond "maintaining the status quo" to a phase where we evolve our infrastructure through engineering, incorporating cloud-native technologies and IaC. We are looking for an engineer with technical leadership to guide our infrastructure organization into the next generation.
- Balancing Stability and Evolution: Lead the optimization and modernization of hybrid cloud environments while protecting the high availability required of a financial institution.
- Engineering Operations: Break free from manual operations by leveraging IaC and automation to build a robust foundation that keeps pace with business growth.

Position Details
- Infrastructure Management & Leadership: Serve as a manager for the infrastructure operations team. Foster member growth and strengthen the organization by creating an environment where each engineer can excel.
- Mission-Critical Maintenance: Oversee the stable operation of financial infrastructure, including core DBs like Oracle Exadata. Act as the command center during incidents to lead rapid recovery and formulate preventative measures.
- Infrastructure Design & Modernization: Lead the design and construction of infrastructure for new services. Update existing configurations to modern, scalable architectures. Promote IaC and automation to eliminate dependency on individual expertise.
- Performance Optimization & Monitoring: Visualize infrastructure performance, identify bottlenecks, and drive continuous improvement to maximize the "limit performance" of the financial system.

Work Environment
Team Size: Approximately 10 members.
- Our Tech Stack: We select and introduce the best tools based on the project and role.
- Cloud & Infrastructure: AWS, Azure, Google Cloud, VMware
- Databases: Oracle (Exadata), MySQL, PostgreSQL, Redis
- IaC & Automation: Terraform, Ansible, Jenkins, GitHub Actions
- Communication & Project Management: Slack, Jira, Confluence, Miro
- Others: GitHub, Docker, Kubernetes
- Note: The above is just an example. As we evolve our development process to be AI-first, we lead the selection and implementation of the most suitable tools as a team.

Mandatory Qualifications:
- 5+ years of experience in large-scale infrastructure operation/construction. Proven track record leading the design, construction, or operation of mission-critical systems (finance, payments, or large-scale web services).
- Deep technical knowledge of OS (Linux/Windows), networking (TCP/IP, L2/L3 switches, load balancers), and security (firewalls, WAF, vulnerability management).
- Practical experience in large-scale database operations (Oracle, MySQL, PostgreSQL, etc.), including performance tuning, backup, and recovery design.
- Project management and vendor control skills: Experience managing progress, quality, and risks in projects involving external vendors.

Desired Qualifications:
- Advanced database operation skills: Experience with Oracle Exadata or performance tuning of large-scale, mission-critical databases.
- Deep understanding of cloud/virtualization: Experience designing and operating AWS/Azure/GCP environments and VMware.
- Automation/Coding skills: Experience developing automation tools (Python/Shell) or managing infrastructure via IaC (Terraform/Ansible).

Other Information:
Additional information on Location
Rakuten Crimson House Aoyama
2-6-21, Minami-Aoyama, Minato-ku, Tokyo

Additional information on Secondment
You will be seconded from Rakuten Group, Inc. to Rakuten Securities, Inc.

Additional information on English Qualification
TOEIC Score exceeding 800
*If you do not currently have a TOEIC score, you will be required to obtain one after joining the company.

#engineer #infrastructureengineer #RakutenSecurities

Languages:

English (Overall - 3 - Advanced), Japanese (Overall - 4 - Fluent)