Responsible for procurement strategies for used mobile devices, analyzing market trends, and establishing supplier partnerships.
Belong is a Japanese device-reuse company that retails and wholesales used smartphones. Its Nicosuma services let consumers and small businesses buy inspected used smartphones and tablets or sell unwanted phones, while its operations center handles inspection, grading and data erasure.
For organizations, Belong One rents, sells and buys used smartphones and tablets, with options including device setup, individual delivery and help-desk support. The company earns revenue from device sales and rentals; its purchasing services replenish inventory for resale. In July 2026, Belong One expanded corporate purchasing to notebook and tablet PCs.
- Salary range
- ¥3M – ¥16M
- Median
- ¥5M – ¥9.2M
- Remote or hybrid
- 48%
- Most requested
- Generative AI / LLM 2
- TypeScript 2
- Go 1
- JavaScript 1
- Japanese posting, level unstated 33
- Common areas
- Business development 6
- Sales 6
- Finance & accounting 5
- Backend engineering 4
Measured from the 33 listings Ranked has live for Belong. Japanese level, visa signal and skills are AI-graded from each posting and can be wrong — confirm against the employer's original posting before applying.
33
open positions at Belong
8
Work with the CFO and management to improve company-wide KPI and management accounting, strengthen financial reporting and internal controls, and build the finance team.
The Engineering PR Manager will enhance and expand the developer community, conveying technical appeal and supporting developer experience.
Propose solutions to corporate clients based on their challenges, integrating devices and services to transform their business processes.
Design and propose large-scale distribution schemes for used smartphones, collaborating with major carriers and agents.
Lead project management as a technical product manager, collaborating closely with business and marketing teams to develop product concepts and drive continuous improvement.
Responsible for understanding and maximizing sales with key partners in the telecommunications industry, including MVNOs and carrier agents.
Lead the new reuse trading unit, developing domestic sourcing and sales for smartphones, tablets, and PCs while building operations, managing targets, and developing the team.
Handle monthly and annual closing, daily accounting, cash-flow and budget reporting, audits, and process improvements, with future work in overseas closing and internal controls.
Manage the product lifecycle for BtoC used smartphone sales and buyback services, leading vision, roadmap, and development direction.
Design new business models with major telecom carriers and distributors, build large-scale device recovery and sales schemes, improve operations, and connect partner and market insight to product teams.
This role involves building strategic partnerships with SaaS companies and IT vendors to create new business models and ecosystems.
Support the performance and job satisfaction of engineers through HR strategy planning and execution, focusing on recruitment and organizational development.
Lead corporate planning at Belong, supporting the CEO and CFO with strategy, business plans and company-wide KPIs. Drive new business, M&A, alliances, executive reporting and team development.
Lead the strategic execution team to maximize business success through technology and data-driven operations.
Supports reuse-device sales by preparing quotations and purchase notices, handling system applications and customer orders, coordinating with operations, and improving new PC-purchasing workflows.
Support the strategic promotion of the marketing department under the CMO, maximizing results through various projects.
Analyze company-wide financial data, build KPI and management-accounting processes, develop plans and forecasts, and prepare reports for executives and the parent company.
Lead strategy and execution for Amazon and other major marketplaces selling refurbished smartphones, using market, competitor, sales and inventory data to maximize revenue and profit.
Leads accounting operations, closing, audit and J-SOX controls while improving systems and workflows, supporting consolidation planning, and managing and developing the accounting team.
Design and direct UI/UX for reuse-market services, creating prototypes and design systems, conducting research and testing, and collaborating with product and engineering teams.
Lead the design, development, and operation of the internal operation system supporting the circulation of used devices.
Responsible for maintaining and improving the availability, robustness, and fault tolerance of internal and external services. Expected to lead the construction and operation of monitoring and alert environments.
Manage Belong’s corporate IT environment, including help-desk support, device and SaaS administration, onboarding, network operations, audits, automation, and security response.
Lead the development and operation of frontend services for Belong's customer services, ensuring a good user experience and supporting partner campaigns.
Lead the Data or Platform team, managing people, processes, incident response, vendors, and product requirements with Product Managers, including scalability and security.
Develop and operate the frontend of the B2C service 'Nico Suma Kaito'. Collaborate with teams to enhance product growth.
Develop and maintain APIs and web front-end services, focusing on scalable and robust solutions.
Support the product manager for a used-device commerce service, prioritizing development tickets, reviewing customer-facing content, shaping support policies, and eventually planning features and sales initiatives.
Develop and operate products related to data management infrastructure, ensuring data accuracy and efficiency.
As a software engineer for Belong's main B2C service, you will focus on backend development, leading API integrations and systematizing the buyback infrastructure.
Develop APIs for internal and external use, design and manage databases, and collaborate with teams to implement solutions.
Build and operate data analysis infrastructure to store and analyze data generated from various services using BigQuery.