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Backend Engineer
| Hiring Company | Japanese Fintech firm listed on NASDAQ |
| Location | Tokyo - 23 Wards, Shinjuku-ku |
| Job Type | Permanent Full-time |
| Salary | 6 million yen ~ 12 million yen |
Work Style
Casual Clothing Side Business Ok Flex TimeJob Description
You will join a newly established engineering organization responsible for rebuilding the core banking system from scratch. Engineers lead planning, architecture, implementation, and operations.
We are expanding our engineering organization to support rapid business growth and build the next generation of banking services.
Responsibilities
- Develop backend applications using Java/Kotlin
- Design reliable, secure, scalable financial systems
- Design application architecture and select middleware
- Optimize microservices
- Design database schemas and SQL queries
- Collaborate with infrastructure engineers
- Configure monitoring, logging and alerting
- Participate in design reviews and code reviews
Tech Stack
Backend: Java, Kotlin, Spring Boot, JUnit, Resilience4j, Feign
Database: MySQL, Aurora, DynamoDB, Kafka, Redis, ELK
Infrastructure: AWS, Docker, Kubernetes, ArgoCD
Tools: GitHub, Gradle, Maven, npm/yarn, Flyway
Collaboration: Jira, Confluence, Slack, Zoom, Miro, PlantUML, draw.io
General Requirements
| Minimum Experience Level | Over 3 years |
| Career Level | Mid Career |
| Minimum English Level | Business Level (Amount Used: English Only) |
| Minimum Japanese Level | None |
| Minimum Education Level | Bachelor's Degree |
| Visa Status | Permission to work in Japan required |
Required Skills
Required Qualifications
- 3–5+ years backend development
- Strong Java experience
- Web application development
- OOP, algorithms, data structures
- RDB/NoSQL schema design
- Performance and security
- Business-level English
- Experience using AI coding tools (ChatGPT, Copilot, Gemini, etc.)
Preferred Qualifications
- Fintech/banking experience
- REST APIs and distributed systems
- AWS
- Large-scale systems
- Microservices
- Business-level Japanese
- AI-assisted development experience
Working Conditions
Full-time, Hybrid, Super Flex Time, Annual paid leave, Social insurance, 401(k), Visa sponsorship, Relocation support.
Job Location
- Tokyo - 23 Wards, Shinjuku-ku
Work Conditions
| Job Type | Permanent Full-time |
| Salary | 6 million yen ~ 12 million yen |
| Work Hours | Super Flex Time |
| Industry | Other (Banking and Financial Services) |
Job Category
Company Details
| Company Type | Large Company (more than 300 employees) |
| Non-Japanese Ratio | About half Japanese |
