All jobs Remote Browse Skills

Search jobs collected from company career pages and public sources, in one place.

Built by Darshit Gajjar. Follow me:

Explore

All jobs Browse all categories Remote jobs Junior roles Senior roles

Popular

AI engineering Frontend Backend Data science

Legal

Disclaimer & Terms Job safety tips Report a job

Jobyssey is a job search engine. We are not the employer or a recruiter and do not verify listings. Jobs link to third-party sites and you apply there at your own risk. Never pay to apply for a job. Company names and trademarks belong to their owners. See the full disclaimer.

© 2026 Jobyssey

Home Jobs Remote Explore

Engineer Part-Timer (Backend / Frontend / R&D) at HashPort Inc. – Tokyo | Jobyssey

Home
Jobs
Backend jobs
Engineer Part-Timer (Backend / Frontend / R&D)

Engineer Part-Timer (Backend / Frontend / R&D)

HashPort Inc. · Tokyo, Japan · 2 months ago

Apply on company site

Before you apply

Jobyssey is a search engine. We don't post, own or verify this job and are not the employer or a recruiter. You'll apply directly on herp.careers, under that site's terms.

Never pay to apply, for training or equipment, and never share bank details, ID documents or passwords before you've confirmed the employer is real.

Job safety tips Report this job Disclaimer

Work mode: Hybrid
Category: Backend

api aurora authentication aws blockchain cryptography dynamodb git github ionic proof-of-concept react react-native

Similar jobs

D

Staff Full Stack Engineer

Dynamic · New York

2 months ago

OnsiteStaffContractapiauthenticationblockchainevm

T

Web3 Front-End Engineer

Tirios.ai

1 month ago

RemoteContractaccessibilityaiapiblockchain

D

Software Engineer in Blockchain

DMG Blockchain Solutions Inc. · Delta, British Columbia

1 month ago

Onsiteapiapi-designauthenticationblockchain

U

Full Stack Engineer (Backend)

User Experience Researchers Pte.Ltd · Singapore

1 month ago

Leadapiapi-securityauroraauthentication

Explore more jobs

Backend jobs Remote Backend jobs Jobs in Japan Backend jobs in Japan Hybrid jobs

version-control

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.

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

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

Benefits

Free drinks and snacks

T

Software Engineer

thirdweb · Remote or San Francisco / Brooklyn

2 months ago

Remoteapiapi-designblockchaindeveloper-experience