Engineer Part-Timer (Backend / Frontend / R&D)
Tokyo-based Japanese blockchain and Web3 company focused on non-custodial wallets, stablecoin payments, NFT services, and enterprise blockchain solutions.
Funding history
Investors
Projects
About HashPort Inc.
HashPort Inc. develops and operates blockchain products and services for consumers, businesses, financial institutions, and public-sector organizations. Its current core offering is HashPort Wallet, a non-custodial digital-asset wallet inherited from the EXPO2025 Digital Wallet, alongside HashPort Wallet for Biz stablecoin payments, enterprise wallet and blockchain solutions, SBT loyalty services, RWA tokenization, and HashPort Market | αU, an NFT marketplace supporting JPYC and credit-card payments.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
Work on HashPort Wallet, a Japanese Web3 wallet serving approximately one million users. Depending on skills and interests, contribute to frontend, backend, or research and development while working with production code under senior engineer guidance.
Requirements
- Fundamental computer science knowledge including data structures and algorithms
- High intellectual curiosity and fast learning ability
- Personal or academic experience with React/TypeScript, Go, or AWS
- Basic version control skills using Git and GitHub
- Self-driven attitude to identify and solve problems
- Motivation to explore and select the best technology for the product
- Experience with Capacitor, Ionic, or React Native is a plus
- Basic knowledge of AWS and Terraform is a plus
- Deep knowledge of Web3, blockchain technology, and cryptography is a plus
- Academic research background in computer science, mathematics, or physics is a plus
Responsibilities
- Improve and maintain HashPort Wallet features
- Implement mobile web app features and UI components using React and TypeScript
- Improve the wallet application's user experience
- Develop APIs using Go
- Integrate Aurora and DynamoDB databases on AWS
- Maintain authentication functionality
- Research cryptography theory, Web3 papers, and EIPs
- Write explanatory articles and blog posts
- Present research findings to the team
- Implement proof-of-concept projects for new protocols and technologies
Benefits
- Free drinks and snacks