Senior Backend Engineer - EC Expansion Development Department (ECEXD)
Core
Senior Backend Engineer leading backend development for e-commerce services including the J.League Online Store and Hometown Tax platform, serving millions of users.
Role type
Senior IC Backend Engineer with team lead responsibilities
Builds
Web APIs, batch processing systems, storefront, order management, and inventory management services
Domain
E-commerce / Retail
Deliverable
production ML models | product features | dashboards & analysis | research | client delivery | infrastructure | physical/clinical work
Required skills
Java, Spring Boot, RESTful API design, Relational Databases (MySQL/PostgreSQL), Containerization (Docker), CI/CD pipelines, Code review, Security expertise
Preferred skills
Microservices architecture, System design, Cloud platforms (AWS/Azure/GCP), Performance engineering, Testing strategy, Architecture patterns (DDD, Clean Architecture)
Technologies
Java21, Spring Boot 3, Spring Web MVC/Batch, Kubernetes, Google Cloud Spanner, Redis, Apache Kafka, Docker, MySQL, PostgreSQL
Responsibilities
Design and implement backend systems focusing on quality and performance, Coordinate with stakeholders to define requirements, Conduct code reviews and mentor team members, Present technical proposals to stakeholders, Take ownership of complex features and drive technical initiatives
Seniority
Senior, hands-on IC with leadership