Backend Engineer

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

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.