Lead Fullstack Engineer / Business System Analyst (BSA) (GG11 ~ GG12)

One of the world’s largest Insurance Service provide is seeking a strong bilingual Lead Fullstack Engineer / Business System Analyst (BSA) who can translate business requirements into technical solutions while possessing strong knowledge of APIs, cloud-native architectures, system integrations, solution design, and AI-driven ways of working. This role requires close collaboration with business stakeholders, architects, and engineering teams to drive successful delivery of integration initiatives, while utilizing Generative AI and AI-assisted practices to improve requirements analysis, solution design, knowledge management, and overall delivery efficiency.

Responsibilities:
- Provide technical leadership and guidance to the team on solution design, integration architecture, API development, and engineering best practices in Agile Development
- Perform code reviews to ensure code quality, maintainability, security, and adherence to enterprise standards
- Partner with business stakeholders, product owners, architects, and engineers to translate business requirements into scalable technical solutions
- Lead requirements gathering, solution analysis, impact assessments, and specification management activities
- Design and document APIs, interface contracts, data mappings, and integration workflows across multiple platforms
- Support architecture discussions and ensure solutions align with enterprise architecture, security, compliance, and operational standards
- Provide expertise in cloud technologies, infrastructure, scalability, integration patterns, and AI-driven engineering practices to enable efficient, scalable, and innovative solution delivery
- Mentor team members and provide functional and technical guidance throughout development, testing, deployment, and production support
- Act as the subject matter expert for Policy Servicing Integration and serve as the primary liaison between business and technology teams
- Lead root cause analysis and support the resolution of production issues across applications, APIs, and enterprise integrations

Required Skills:
- 7+ years of development or Fullstack or bridge engineer or BSA experience
- Minimum API design and integration technologies (REST APIs, OpenAPI/Swagger, JSON, XML)
- Cloud platforms and services (Azure) with knowledge of cloud-native architectures
- Enterprise integration patterns, middleware technologies, and distributed systems
- Microservices architecture and event-driven integration solutions
- CI/CD, DevOps, release management, and software delivery lifecycle practices
- Application monitoring, logging, observability, and proactive operational support
- Security best practices, authentication and authorization mechanisms (OAuth, JWT, SSO)
- Vulnerability management, security remediation, dependency upgrades, and compliance support
- System stability, reliability, resiliency, and performance optimization for business-critical applications
- Database technologies, data modeling, and integration fundamentals
- System interoperability, distributed application architecture, and cross-platform integrations
- Strong troubleshooting, root cause analysis, and production support experience
- Ability to utilize Generative AI, Prompt Engineering, Copilot technologies, and AI-assisted engineering practices to improve productivity, accelerate solution delivery, enhance decision-making, and drive continuous innovation across the software development lifecycle

Why you should apply:
- Join a highly collaborative team where business and technology professionals work together to deliver impactful solutions across the organization.
- This role offers the opportunity to partner with business stakeholders, architects, and engineers, contribute to key technology decisions, and drive meaningful outcomes for customers and the business.
- Leadership opportunity


Company details:
A leading global provider of insurance and financial services, serving over 90 million customers in more than 50 countries. With over 150 years of experience, the organization delivers innovative insurance, annuities, and employee benefit programs to individuals and businesses worldwide. It boasts a 40-year track record of success in Japan, supported by diverse sales channels and a comprehensive product lineup. Committed to digital transformation and building a diverse, inclusive workplace, the company offers IT professionals the opportunity to work on enterprise-scale projects and cutting-edge data solutions in a globally integrated environment.

Working Hours: 9:00 - 18:00 (Mon-Fri)
Working Style: 3 days’ work in office, and 2 days’ work from home
Holidays: Saturday, Sunday, National Holidays, Year-end and New Year Holidays, Paid Holidays
Services/Benefits: Transportation expenses up to 20,000 yen per month, plus Paid leave, plus social insurance (health insurance, welfare pension, and work-related accident insurance), Periodic health examination, and Employment insurance