Full Stack Developer

スタートバーン株式会社仕事概要We develop APIs, SDKs, web UIs that interact with Ethereum-based blockchain systems. You’ll begin by working on our front-end and back-end development. If you’re eager to dive deeper into web3 areas such as smart contracts, subgraphs, or IPFS, you’ll also have the opportunity to do so. **Our Development Environment** -Blockchain: Ethereum, Polygon (in Solidity) -Frontend: Next.js (TypeScript), CSR/SSR, REST, GraphQL -Backend: Node.js (TypeScript), NestJS, The Graph -Infrastructure: Kubernetes, Google Cloud Platform(GCP), Alchemy -IDE/AI for development: Cursor, OpenHands or anything that can accelerate our productivity -Source control: GitHub -CI/CD: CircleCI -Design: Figma -Communication: Slack, Notion, Zoom, GitHub, JIRA While this is our current tech stack, you are welcome to suggest and implement improvements where appropriate. You can find some information about what we do technically at https://medium.com/startbahn/startrail-and-startbahn-cert-c7a20e8b720f .必須スキル Over 3 years of professional experience in full-stack web development with a focus on TypeScript for both front-end and back-end applications. - Strong experience with modern frameworks and libraries, including NestJS and Next.js. - Proficiency in designing, writing, and executing automated unit, integration, and end-to-end tests using modern testing frameworks (e.g., Jest, Mocha, Cypress, Playwright). - Familiarity with advanced concepts such as dependency injection, modular architecture, server-side rendering (SSR), static site generation (SSG), API design, and state management. - Working knowledge of CI/CD pipelines, code quality tools, and best practices for maintainable, testable, and performant applications. - Ability to communicate in business-level English.歓迎スキル Experience with DevOps and cloud infrastructure (e.g. AWS, GCP or Azure). Experience with Kubernetes is a plus. - Proficiency in smart contract development on EVM blockchains - Ability to communicate in Japanese応募概要給与 ■For full-time employees *Applicants must reside in Japan ＜Compensation will be determined based on experience and skills, in accordance with company regulations＞ *The above salary includes a fixed overtime allowance equivalent to 20 hours per month *Additional overtime pay will be provided for any hours exceeding the fixed allowance *Stock options will be granted separately ■For contractors *Open to applicants living abroad 勤務地 ■For full-time employees 6A, 6-31-15 Jingumae, Shibuya-ku, Tokyo *Hybrid work style: 2–3 days per week in the office *Work location may be subject to change as designated by the company (including remote work locations) ■For contractors Primarily remote. If based in Japan, occasional office attendance may be required. 雇用形態 Full-time employee / Contractor 勤務体系 ■For full-time employees Working Hours - 9:30 AM – 6:30 PM (8 hours of actual work) - Core working hours: 11:00 AM – 4:00 PM Holidays and Leave - Full two-day weekend (Saturday, Sunday, and national holidays) - Year-end and New Year holidays (December 28 – January 3) - Summer vacation (3 days taken between July 1 and September 30) - Special leave for weddings, funerals, etc. ■For contractors To be determined at the time of contract. For overseas residents, a time difference of within ±2–3 hours from Japan Standard Time is preferred. 試用期間 Probation Period 3 months 福利厚生 ■For full-time employees - Commuting allowance (with an upper limit) - Full social insurance coverage (health insurance, employee pension, employment insurance, workers’ compensation) - Congratulatory and condolence payment system - Maternity leave (before and after childbirth) - Childcare leave - Nursing care leave - Shortened working hour system企業情報企業名 スタートバーン株式会社 設立年月 2014年3月26日 本社所在地 東京都渋谷区神宮前３－３１－１５ ６A 資本金 1億円 従業員数 ２0名