Fullstack Web Developer with Python/Go

  • Tokyo
  • Partial Remote
  • Full-time
  • October 19, 2023
6,000,000 JPY or more/yr
Apply from Japan Only
No relocation to Japan
(No visa sponsorship from overseas)
Language Requirements
Japanese: Not Required 👍
English: Business Level
Minimum Experience
Junior or above

Job Description

pafin(formerly Cryptact) is a leading provider of cryptocurrency profit and loss calculation in Japan named Cryptact, and we’re improving our platform on a daily basis. These days, a new financial mechanism called “DeFi” is trending which allows people to directly trade cryptocurrency-based financial instruments over blockchains, and Cryptact also adopts it for our clients to manage their portfolio. As we grow and expand our business, we look for an engineer who can join our effort in DeFi area and work together in the following tasks:

  • Fullstack web development for our DeFi specific web systems, both for external clients and an internal management.

  • Integrate internal APIs for DeFi into the web systems.

  • Depending on your preference, you will also join DeFi/blockchain related tasks such as Investigate and analyze blockchains, and integrate them into our existing platform.


A successful candidate will have at least one of the following qualifications

  • Knowledge and experience in full stack web development using React, Next.js and/or TypeScript.

  • Knowledge and experience in Python or Go

Preferred Qualifications

Knowledge and experience in either of, or all of DeFi/Web3/Blockchain.

pafin (formerly Cryptact) is a Fintech start-up whose platform enables you to manage all of your investments in one place — from stocks to cryptocurrency.

Their cryptact service was released in 2017 and is Japan’s largest when it comes to calculating cryptocurrency taxes. Their service also supports US and overseas accounting methods with plans for professionals as well.

They also run fintact, a service that helps people around the world find investment ideas and information. It is designed from the ground up to ensure transparency while providing a rich game-like experience within a large global community of investors.

View pafin's company page

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Fullstack Web Developer with Python/Go at pafin
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