Multi-Stack Engineer/ マルチスタックエンジニア

  • Tokyo
  • Partial Remote
  • Full-time
  • June 4, 2025
Conditions
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¥6M ~ ¥10.03M /yr
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Apply from Japan Only
(You must live in Japan to apply)
Requirements
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Language Requirements
Japanese: Business Level
English: Business Level
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Minimum Experience
Mid-level or above

Description

  • As Front end engineer - you will be in charge of system management of front end fields regarding our Revenue Based Finance(RBF) platform “Yoii Fuel”.
  • We launched this service in April, 2022. On the finance side, we raised  400 million JPY in pre-series A in September 2022 - have raised 600 million JPY as of now.
  • You will communicate across teams to provide better products and promote development.

 

  • 当社の自社サービスである「Yoii Fuel」のフロントエンド開発をお任せします。
  • 22年4月にサービスリリースし、今後のユーザビリティ向上に向けて、中心となって活躍いただくことを期待します。

 

Tech Stack

  • Programming languages: TypeScript, React.js, Go
  • Architecture: Docker
  • Infrastructure: AWS(Terraform)
  • Database: AppSync, Lambda, Cognito, Glue, Athena, StepFunctions, DynamoDB, RDS
  • DWH: Snowflake
  • Communication tools: Slack, Notion, ClickUp

 

開発環境

  • 開発言語:TypeScript, React.js,Go
  • インフラ:AWS(Terraform)
  • データベース:AppSync, Lambda, Cognito, Glue, Athena, StepFunctions , DynamoDB, RDS
  • DWH:Snowflake
  • コミュニケーションツール:Slack,Notion

 

About the product

This is a Fintech service that was launched in April 2022 to provide new options for startup fundraising. We assess future sales from customers' financial data and provide funds based on the assessment. We are currently launching a function to assess financial data by linking with the customer's accounting software through API, but since we have just started providing the service, we aim to have a development system that can improve usability by listening to customer feedback.

In the future, we plan to develop a system to streamline our internal operation flow (submission of financial data - scoring (assessment) - funding - repayment) and create a track record of customer use "faster" and "more," as well as launch new services.

We also plan to expand our services overseas, such as to Southeast Asia, in the future.

 

プロダクトについて

22年4月にローンチしたスタートアップの資金調達に新しい選択肢を提供するFintechサービスです。顧客の財務データから未来の売り上げを査定し、査定を根拠に資金を提供しております。現在は顧客の会計ソフトとAPI連携し、財務データの査定を行う機能などをローンチしておりますが、サービス提供を開始したばかりでもあるため、お客様の声を吸い上げてのユーザビリティを向上していける開発体制を目指しております。

また、今後は社内のオペレーションフロー(財務データの提出~スコアリング(査定)~資金提供~返済)を効率化し、”より早く””より多く”の顧客利用実績をつくるためのシステム開発や、新たなサービスもこれからローンチしていく予定がございます。

将来的には東南アジアなど海外でのサービス展開も見据えております。

 

Team Members

As of October 2022, we have 6 full time tech team members. (CTO, Product Manager, Front-End, Back-End, Data Scientist, Designer) We also have several part time members helping us at the field of system development.

 

配属先組織

フランス・ポーランド・ジャマイカなど多国籍なメンバーが活躍しております。
プロダクト開発部:CTO-PdM-エンジニア・データサイエンティスト+業務委託メンバー

 


Requirements

  • 3 years or more of experience as a software engineer
  • Japanese: N2 or above
  • English: Daily conversation level or above
  • Experience in at least two of the following areas:
    • Frontend development: React (Vue or Angular also acceptable)
    • Backend development: Go
    • Infrastructure as Code (IaC): Terraform (other IaC technologies also acceptable)
    • Data pipeline / Data warehouse: DWH (e.g., Snowflake)

 

  • エンジニア経験3年以上
  • 日本語:N2以上
  • 英語:日常会話レベル以上 (目安TOEIC 650点以上)
  • 下記のうち2つ以上の業務経験
    • フロントエンド:React(VueまたはAngularも可)
    • バックエンド:Go
    • IaC:Terraform(その他IaC技術も可)
    • データパイプライン:DWH(Snowflake等)

 

Preferred Experiences

  • Have experience in developing FinTech services
  • Experience deploying web services
  • Understanding of unit testing
  • Experience in Scrum development

 

  • FinTech系サービスの開発経験がある
  • Webサービスのデプロイ経験がある
  • ユニットテストへの理解がある
  • スクラム開発経験がある

 

We are looking for

  • A series of UI/UX-related work from planning to implementation
  • User interface discussions with designers, product managers, and business development members

 

  • 企画から実装までの一連のUI/UX関連業務ができる
  • デザイナー、プロダクトマネージャー、事業開発メンバーとのユーザーインターフェースに関するディスカッションができる

Yoii provides revenue-based financing to startups. They enable a wide variety of startups to flexibly secure funding based on their business KPIs.

Funding for startups is mainly through equity financing or debt financing.

However, many entrepreneurs are cautious about equity financing due to dilution.

Also, in some cases, the entrepreneur’s guarantee or collateral is required for debt financing that is not so accessible for early-stage startups.

Understanding the problems that “funds are not reaching startups that are taking on challenges” and “there are many startups that cannot show their value”,

Masaharu Uno (CEO) and Task Ohmori (CTO) developed the revenue-based financing platform “Yoii Fuel”. With experience in finance and blockchain, they’ve built this platform with the aim of “for the ambition of entrepreneurs”.

At the end of November 2023, our business has experienced rapid growth, with the number of adopting companies increasing by approximately 205% year-on-year, RBF execution amounting to about 260%, and the number of deals increasing by approximately 250%!

Regarding the user base, we aim to further enhance our services to a wider range of small and medium-sized enterprises in various regions and industries, not limited to startups. Now we have approximately 20 employees, with a total of around 30 including contractors. Comprised of multinational members, we are also considering business expansion overseas, and internal communication is based on English.

View Yoii's company page

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Multi-Stack Engineer/ マルチスタックエンジニア at Yoii
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