• Full-time

Publication date: 2025.06.02

Software Engineer(Frontend) (13380)

  • System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
  • Tokyo
  • Salary 4.5M〜9.24M Yen
ソフトウェアエンジニア(フロントエンド) (13380)
職種Position System Engineers / Infrastructure Engineers / Web Engineers / Game Developers
会社概要Company profile [Company Overview]
A corporate venture originated from ITOCHU Corporation, offering services such as used smartphone purchasing, sales, and rentals.
We operate "NicoSma" and "Belong Purchase" for individuals, and provide several B2B solutions including:

Belong One Rental Plan

Belong One Sales Plan

Belong Purchase for Biz

[Attractive Points of the Company / Role]
Contribute to a mission: "Deliver value you can be proud of to the people who matter most."

Be part of a socially impactful business that promotes reuse of smartphones and other devices.

Work in an environment that allows for flexible and adaptive development tailored to diverse user needs.

Opportunity to enhance your skills using modern technologies such as APIs and web services.

Enjoy flexible working hours (flextime system) that support various lifestyles.

Comprehensive benefits, including health checkups, transportation allowance, and employee discounts.

Collaborate with your team to tackle complex challenges thoughtfully.

A challenging role where you can create and deliver new value to the market.
仕事内容Job description *This position is available only for people residing in Japan
【Background】
Frontend engineers in this role are expected to take initiative and ownership across the entire lifecycle of internal and external web UIs—from design and development to testing and operations. Writing clean, reusable, and readable code based on best practices is emphasized, along with close collaboration with backend engineers for API design.
The company operates a variety of services, including consumer-facing platforms like a smartphone sales and trade-in service, corporate solutions, and internal tools. This creates a wide range of opportunities for frontend engineers to contribute. We’re looking for team members who are excited to enhance user experience and accelerate development speed in a growing service environment.

【Responsibilities】

Develop and maintain frontend for the consumer platform and trade-in services

Build admin dashboards for internal tools and inventory management systems

Customize Shopify and create/manage apps for storefront and backend improvements
Scope of work may change based on company needs

■ Development Environment
Languages: HTML, CSS, TypeScript
Frameworks/Libraries: React, Next.js
Infrastructure: Google Cloud (e.g. Cloud Run)

■ What Makes This Engineering Role Unique

Agile development with responsibilities assigned by phase (e.g., requirement gathering, design)

Involvement in various stages of the product lifecycle—from design to operations—not just implementation

Engineers can participate in product planning meetings and contribute to feature discussions

Opportunities to explore areas beyond your specialty, such as backend or product discussions

Regular internal tech talks and open forums are held, welcoming engineers from all areas

Hybrid work style with 2–3 in-office days per week
応募資格Requirement [Required Skills]

Japanese language proficiency at N2 level or higher

A degree in Computer Science, Information Engineering, or equivalent practical experience

Understanding of the Software Development Life Cycle (SDLC), including version control systems and CI/CD

3+ years of frontend development experience using TypeScript, including experience as a lead engineer

Deep understanding of frontend frameworks/libraries such as React, Next.js, or Vue.js

Experience in mentoring or managing junior members

Experience leveraging ChatGPT, Gemini, or similar technologies for information gathering and operational efficiency (e.g., documentation)

[Preferred Skills]

Experience with public cloud platforms such as Google Cloud

Experience with SEO optimization for e-commerce sites and using Google Analytics / Google Tag Manager

Experience using GraphQL

Basic knowledge and experience with databases

Development experience using design tools like Figma

Development experience with Shopify

Experience with automated testing tools such as Jest, Vitest, or Cypress

Development experience, knowledge, or strong interest in Bubble.io

Experience in the development or operation of Warehouse Management Systems (WMS)

Business-level English proficiency (TOEIC score of 800 or higher)

Experience working at fast-growing companies or in startups
日本語力Japanese level Business
雇用形態Employment type Full-time
勤務エリアLocation Tokyo
勤務時間Working hours Flexible working hours with core time11:00~15:00
想定年収Salary 4.5M〜9.24M Yen
条件・待遇Condition Employment Type: Full time
Trial period: months:3months
Estimated annual income: 7M-12M Yen
Work location: Tokyo
Working hours:Flexible working hours (core time: 11:00 AM – 3:00 PM)
Holidays: 2 days a week (Saturdays and Sundays), national holidays
Vacation: Summer vacation, year-end and New Year holidays, and other vacations available
Overtime: Average month
Benefits: Comprehensive social insurance, commuting allowance (according to company policy), condolence leave, maternity and childcare leave, parental leave, Sick Leave (10 days per year granted separately from paid leave for personal illness or injury), Family Emergency Leave (10 days per year granted separately from paid leave, usable for family emergencies, childcare, or caregiving).
Remote work is available, with on-site attendance recommended 2–3 times per week.
選考についてProcess
Comments from United World
TOP