Backend Engineer (Contract Position)

Remote OK - Anywhere in Japan
Full-time
August 5, 2025

Description

Salary

¥6,250~/h

Estimated operating hours per month: 80 to 160 hours

Distributed Ledger Technology (DLT), including blockchain, is poised to bring about major changes in society. In the financial sector, Japan's revised Payment Services Act will come into effect in 2024, becoming the first country in the world to establish legal requirements for stablecoins.

This will enable the transfer of tokens (stablecoins) with stable value on the blockchain while complying with regulations, and is planned for use in international remittances for business entities, such as trade remittances.

Datachain has launched "Project Pax," a collaborative project with Progmat, Inc., to build a cross-border stablecoin (SC) remittance infrastructure, and is currently developing the product with the aim of commercialization in 2025.

In this position, you will be responsible for product development across a wide range of disciplines, including back-end development and infrastructure design and construction.
After gaining a deep understanding of the product's value proposition with the product owner and product manager, you will discuss technical feasibility and constraints with the PO and PdM, and work with other engineers to define the system architecture and implement it from launch to growth.

You will hone a wide range of technical skills through the entire development process, from requirements definition to design, implementation, testing, and operation, and put cutting-edge technologies such as blockchain into practical use to create a new financial infrastructure.

Description

Experience leading the design and implementation of complex enterprise-level (B2B) or B2C systems
Experience developing systems using cloud services such as AWS or Azure
Experience designing systems that are highly scalable, can handle increasing user loads, and maintain optimal performance
Experience promoting and implementing environments that ensure the internal quality of systems
Experience implementing statically typed languages (Go, C/C++, Java, Rust, Scala, etc.) while capturing the unique characteristics of each language
Interest in blockchain technology
Japanese: Business, Advanced Level

Requirements

Experience in developing architecture from scratch and leading cross-organizational system design discussions at a startup
Experience developing products in the FinTech field
Familiarity with Web3 concepts and technologies or Web3 development experience
Experience designing systems that are highly scalable, can handle increasing user loads, and maintain optimal performance
Experience providing technical leadership and guidance to engineering teams, helping them implement architectural solutions and best practices
Experience with front-end development
English: Business level

APPLY NOW ➜Japanese Required ⚠️

About Datachain

Datachain is a startup engaged in research and development in the field known as "interoperability," which connects different blockchains, as well as the development of FinTech products.

Their research and development efforts have achieved significant results, including ranking first globally in the number of OSS releases by a third party and being the only entity in Japan to receive a grant from the "Interchain Foundation". Leveraging these technically advanced achievements, Datachain is developing products in the financial sector.