full stack developerの求人 - 東京都 墨田区

Offices in Japan and Germany available.

Full-Stack Software Engineer (Japan-Germany)

ワークスタイル

リモートワーク・在宅勤務服装カジュアル残業少なめフレックスタイム制

募集要項

Position: Full-Stack Software Engineer (Frontend-Focused)

About the Company

Beff is a global company that provides a software/hardware platform to enable a carbon-neutral society through the development of batteries, which are core components of electric vehicles.

Job Description

We're looking for a Full-Stack Engineer with strong front-end skills and a passion for building real products. You’ll be responsible for taking ideas from concept to live, collaborating closely with other team members and stakeholders, and shipping features that customers love.

This role is ideal for someone who’s built and launched real products, understands tradeoffs, and can balance speed with craft.

Job Responsibilities:

• Own features end-to-end, from rough wireframes to deployed apps
• Build high-quality, modular, and performant UIs using React.js and any other most suitable tools.
• Collaborate with product/design to shape UX that’s intuitive
• Design and build scalable APIs and backend logic using NestJS and Python
• Architect solutions that are maintainable, extensible, and clean
• Participate in roadmap discussions, give feedback, and contribute to product direction
• Push for quality through thoughtful code reviews, testing, and refactoring
• Constantly look for ways to optimize dev speed and output quality

Reference Annual Salary

• Engineering Leader～Manager
  Example: ¥6,000,000 per year (including 25 hours of fixed overtime) + bonus (based on company performance and individual evaluation) = ¥7,000,000～

※The final offer will be determined based on your experience and skills.

Application Notes

To ensure a smooth screening process, please make sure to include the following information in your CV when applying:

• Major development projects you have worked on (including both professional and personal projects)
• Your specific responsibilities and roles in each project
• Programming languages, frameworks, and tools used (e.g., React.js, NestJS, Python, AWS, etc.)
• Additional details such as the type of product, team structure, and development duration will also help facilitate the selection process.

Why Join Us?

• Create real impact in the battery and green energy world, driving a sustainable future
• Build meaningful products from scratch
• Shape product and engineering direction, not just code it
• Fast iteration, real ownership, high impact,

Join our team at Beff, where we’re not just planning for the future, we’re creating it!

応募必要条件

スキル・資格

Required Skills & Experience

• 4+ years of professional full-stack web development experience (excluding academic projects) using React.js or Vue.js and TypeScript
• Hands-on experience with API development using Node.js or Python (REST/GraphQL)
• Knowledge of UI/UX fundamentals, component design, and state management
• Familiarity with E2E testing or A/B testing to ensure product quality
• Ability to collaborate with designers using tools like Figma
• Experience with Git-based workflows and agile development practices
• Strong communication skills and ability to work in a fast-paced, startup environment

Bonus (Nice to Have)

• Experience working at a startup or shipping SaaS products
• Experience with large-scale or high-traffic web services
• Familiarity with user testing and prototyping for UX improvements
• Experience with cloud platforms (AWS/GCP/Azure) and CI/CD pipelines
• Knowledge of microservices or event-driven architecture
• Domain knowledge in battery development or manufacturing (a plus)
• Experience in building internal developer tools or improving developer experience

Tech Stack

• Frontend: React.js (Hooks, Context, modern state management, component libraries)
• Backend: NestJS (Node.js), Python (FastAPI for data services)
• Databases: PostgreSQL, Redis, NoSQL
• Infra/DevOps: Docker, AWS, GitHub Actions
• Tooling: Figma, Linear

勤務地

• 東京都 23区, 千代田区
• 東西線、 大手町駅

労働条件

雇用形態正社員給与600万円 ~ 1200万円

勤務時間: フレックスタイム制（コアタイムなし） ※職位により異なります。

休日・休暇: 完全週休2日制（土・日）、祝日、夏季休暇、年末年始休暇、年次有給休暇

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