This position is closed and is no longer accepting applications.

Technical Lead

Pafin Chiyoda-ku, Tokyo
  • 💴 ¥7M ~ annually
  • 🏡 Partially remote
  • 🧪 Minimum years of experience unspecified
  • 💬 No Japanese required
  • 🗾 Japan residents only
  • 🧳 No relocation support

About Pafin

Pafin Chiyoda-ku, Tokyo

Pafin provides an investment management platform for individual investors in Japan, known as Cryptact Grid. The first service launched on Grid is Japan’s largest service for profit/loss calculation and tax assistance in cryptocurrencies.

Key benefits

  • Flextime
  • Free Japanese lessons
  • Technical Cofounders

About the position

You are going to join an early phase of the project and lead a team of developers of a joint project with Tokyo University hospital, which aims to establish a market of medical images backed by a blockchain for traceability, to foster developments of medical AIs. This is supposed to handle a large amount of data, and you will always need to keep in mind its security and performance.

As a team lead, you will cover the entire SDLC of the project. First, you will work with SMEs to understand the requirements and come up with an architecture design and an implementation plan. Some requirements need coordination of external partners so that you will be asked to join the conversation to provide your opinions. You can also discuss with other experienced members in Cryptact about the choice of technologies you will make. Because this is a small team, you will also work on the development/testing on a hands-on basis together with the other developers. If necessary, you’ll discuss your team-building plan with business owners.


  • Knowledge of infrastructure (AWS)
  • Experience in full-stack web development
  • A good communication skill to all stakeholders, both internal and external, in an adequate media and style.
  • Being comfortable in a fast-paced start-up environment.

Nice to haves

While these are not required, please tell us if you have any of the following.

  • Mobile application experience in whatever format (ReactNative, Capacitor, etc)
  • Experience in leading a team of developers
  • Experience in medical image application development
  • Knowledge in blockchain programming
  • Experience in python development including Django


From 7m JPY annually. Stock option are also available.


Starting from 7 million JPY annually. Stock option are also available.

Hiring Process

  1. 1

    First interview

    We’ll check what is written on resume, and are looking for a basic cultural fit. Conducted online.

  2. 2

    Second interview

    We’ll go in depth into tech.

  3. 3

    Final discussion

    You’ll speak with a tech director and the CEO.

Related jobs

More jobs like this

I'll send you a digest of new English-friendly software developer jobs in Japan. Your email stays private, I don’t share or sell it.