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Software Engineer for Backend System

Motoakasaka, Tokyo, Japan💼 Full-time🗓 2026-08-12 → 2026-09-27

Core

Design, build, and operate global backend systems for billing, device sales, and internal business operations supporting IoT connectivity services.

Role type

Senior backend software engineer (full-stack capable)

Builds

Billing and payment systems, device distribution systems, internal business management systems

Domain

IoT connectivity, telecommunications, global SaaS platforms

Required skills

Java or statically typed language implementation, large-scale web system development, scalable data design, performance tuning, system architecture, API development, global team collaboration

Preferred skills

AWS/GCP/Azure infrastructure, Spring Boot, payment services, ERP customization, telecom business (iSIM/eSIM)

Responsibilities

Design and implement billing and payment systems for global services, build device and communication equipment sales/distribution systems, develop internal business management tools, continuously improve existing systems based on user feedback, plan and launch new business systems

Seniority

Senior, hands-on IC

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