Backend Engineer (Apps Dev) - Lead Engineer

  • Remote OK - Anywhere in Japan
  • Full-time
  • August 4, 2025
Conditions
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¥8M ~ ¥18M /yr
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Apply from Japan Only
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No relocation to Japan
(No visa sponsorship from overseas)
Requirements
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Language Requirements
Japanese: Business Level
English: Not Required
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Minimum Experience
Senior or above

Description

About Datachain

On September 5, 2024, we announced a project to build a cross-border remittance infrastructure in collaboration with international organizations! By using stablecoins, digital currencies whose value is linked to fiat currency, we aim to enable fast, cheap, and convenient international remittances.

Since our founding in 2018, Datachain has been conducting R&D into technology and business opportunities with the goal of creating a de facto infrastructure as a Japanese-made global x deep tech company.

Our company aims to become a decacorn (a startup with a corporate value of over $10 billion), and it's often said that to achieve this goal, we need to "win in global x deep tech."

The aforementioned cross-border remittance infrastructure project was launched as a major first step toward this goal. Currently, we are moving forward with the project with an advantage thanks to Japan's advanced legal framework, but given the size of the market, global competition is expected to intensify in the future.

In this environment, we are currently rapidly expanding our recruitment efforts, primarily for our development team, in order to take the lead in creating a "de facto infrastructure" that is "global x deep tech" originating from Japan.

 

Why Datachain Can Realize This

  • We have already begun developing an international remittance infrastructure using stablecoins in collaboration with international organizations that connect financial institutions around the world.
  • In June 2023, Japan became the first developed country to enact a bill regarding blockchain stablecoins, making it a global leader in terms of legal framework. This is important for major companies to utilize stablecoins.
  • Datachain's research and development of inter-blockchain communication technology is world-leading.

 

What Makes This Position So Rewarding

  • To drive major new business, backend lead engineers need to launch new systems and create the ideal environment for building them.
  • To create this environment, a team leader is needed.
  • Understanding the challenges and excitement of establishing a new team, you will take the lead in creating development processes, culture, and systems that allow engineers to work at maximum efficiency.
  • In terms of implementation, in addition to standard web applications, we will also implement blockchain applications, and each individual will contribute to creating the organization, culture, and systems necessary to achieve continuous development!

 

Technologies Used

*May vary by project

  • Blockchain
    Language: Go, Rust, Solidity, Kotlin
    Network: Ethereum, BNB Chain, Cosmos, etc.
  • Server-Side/Backend Development
    Language: Go
    Database: PostgreSQL (Azure Cosmos DB)
  • Front-End Development
    TypeScript, Next.js, wagmi, Chakra UI
  • Infrastructure/SRE
    Cloud: Azure, Kubernetes
    CI/CD: GitHub Actions, Argo CD, Argo Workflows
    Monitoring: OpenTelemetry, Grafana

 

Requirements

  • Experience implementing development infrastructure for new start-ups, defining development rules, defining review processes, and creating repository strategies.
  • Experience communicating with product managers and organizing the elements necessary for system development in a Design Doc or similar format.
  • Experience sharing technical knowledge through pair programming, mob programming, walkthroughs, etc.
  • Experience making rational technical decisions that balance business, organization, and technology.
  • Experience making decisions with a view to mid- to long-term system operation and developing an environment that ensures internal quality.
  • Experience implementing using statically typed languages (Go, C/C++, Java, Rust, Scala, etc.) while capturing the unique characteristics of each language.
  • Basic implementation knowledge of algorithms, data structures, networks, security, design patterns, etc.

 

Welcome Requirements

  • Experience developing products in the FinTech field
  • Experience promoting technical PR/recruitment activities in the engineering field
  • Ability to implement based on English literature
  • Experience developing blockchain-related software

 

Desired Profile

  • Someone who can assess the current situation, define the ideal future system, and lead a team to create a good system.
  • Someone who can determine the balance between business, organization, and technology and explain what that should be from a technical perspective.
  • Someone who can collaborate with engineers and tech leads across the company to create a development team culture.
  • Someone who can proactively improve their technical skills to create a good system and take the lead in creating a development environment and organization that will enable them to create a good system.

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.

View Datachain's company page
Backend Engineer (Apps Dev) - Lead Engineer at Datachain
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