Senior Back-end Engineer

  • Tokyo
  • Remote OK - Anywhere in Japan
  • Full-time
  • November 7, 2023
5,000,000 - 8,000,000 JPY /yr
Apply from Japan Only
(You must live in Japan to apply)
Language Requirements
Japanese: Business Level
English: Business Level
Minimum Experience
Senior or above

Recruitment Background

We currently have a shortage of senior-level backend engineers within our organization, with only a few individuals at the senior level. We are seeking experienced and technically proficient engineers to join us, bringing strong leadership and expertise. We aim to enhance our technical capabilities in line with organizational growth and establish more efficient development processes. We look forward to collaborating with outstanding backend engineers to achieve these goals.



  • Designing and developing system architectures
  • Optimizing and improving backend processes
  • Designing and optimizing databases and queries
  • Managing project progress and task assignments
  • Developing new features and maintaining existing functionality
  • Providing technical support and guidance to team members


Key Responsibilities

  • Leading the introduction and implementation of agile development methodologies
  • Collaborating with team members to strategize and ensure project success
  • Contributing to the streamlining and improvement of development processes
  • Troubleshooting technical issues and proposing effective solutions
  • Supporting the technical growth and skill development of team members
  • Driving feature implementation in collaboration with the business department
  • Collecting user feedback and incorporating it into product improvements



  • Minimum of 5 years of professional experience as a backend engineer
  • Extensive experience in developing applications using GraphQL/REST API for 5+ years
  • Proficiency in TypeScript with at least 3 years of experience
  • Bonus: 3+ years of experience with Ruby on Rails development
  • Minimum of 5 years of development experience using AWS services
  • Experience with RDS, S3, ECS, Elasticsearch, SQS/SNS, Lambda, CloudFront, DynamoDB, and other AWS services
  • Comfortable with writing tests


Preferred Experience

  • Experience introducing agile development methodologies to non-agile teams
  • Experience implementing agile development practices in teams with foreign members
  • Experience working in 5-6 member teams, utilizing agile development and releasing features
  • Development experience in BtoB companies
  • Minimum of 1 year of experience in SaaS industry development
  • Minimum of 1 year of experience in web marketing industry development
  • Minimum of 1 year of experience in platform development
  • Minimum of 1 year of experience in PLG product development
  • Experience in developing during the transition from SLG to PLG
  • Minimum of 3 years of experience in web application development
  • Minimum of 3 years of professional experience excluding freelance work
  • Minimum of 1 year of development experience in a global tech company (excluding internships)
  • Experience in user-oriented development
  • Experience working closely with designers and product managers to run sprints and release features
  • Experience implementing functionality in collaboration with the business side
  • Experience incorporating user feedback into product improvements
  • Entrepreneurial experience
  • Minimum of 1 year of experience as a CTO






  • システムアーキテクチャの設計および開発
  • バックエンドプロセスの最適化と改善
  • データベース設計およびクエリの最適化
  • プロジェクトの進行管理とタスクの割り当て
  • 新機能の開発および既存機能のメンテナンス
  • チームメンバーの技術サポートと指導



  • アジャイル開発手法の導入と実践に関するリーダーシップを担当
  • チームメンバーと協力してプロジェクトの成功に向けた戦略を策定
  • 開発プロセスの効率化および品質向上に貢献
  • 技術的な問題解決と適切な解決策の提案
  • チームメンバーの技術的な成長とスキル向上のサポート
  • ビジネス部門とのコミュニケーションを通じた機能実装の推進
  • ユーザーフィードバックの収集と製品改善への反映



  • バックエンドエンジニアとしての実務経験5年以上
  • GraphQL/REST APIでの開発経験5年以上
  • TypeScriptでの開発経験3年以上
  • Ruby on Railsでの開発経験3年以上(尚良し)
  • AWSでの開発経験5年以上
  • RDS、S3、ECS、Elasticsearch、SQS/SNS、Lambda、CloudFront、DynamoDBなどのAWSサービスの経験
  • テストの作成に慣れていること



  • アジャイル開発を行っていなかった開発組織にアジャイル開発を導入した経験
  • 外国人メンバーがいる開発組織でアジャイル開発を実施した経験
  • 5~6人のチームでアジャイル開発を行い、機能をリリースした経験
  • BtoB企業での開発経験
  • SaaS業界での開発経験が1年以上
  • Webマーケティング業界での開発経験が1年以上
  • 1年以上のプラットフォームの開発経験
  • 1年以上のPLGのプロダクト開発経験
  • SaaSのユーザー数が1000人以上→10000人以上に増えた時期に開発した経験
  • SLG→PLGへの移行時にプロダクト開発をした経験
  • Webアプリケーションの開発経験が3年以上
  • フリーランスを除くエンジニア歴が3年以上
  • 世界規模のテック企業で1年以上の開発経験(インターンを含まず)
  • ユーザー目線での開発経験
  • デザイナーやPdMと共にスプリントを回し、リリースした経験
  • ビジネス側と共に機能を実装した経験
  • ユーザーフィードバックを製品に反映させた経験
  • 起業経験がある
  • CTOを1年以上務めた経験がある

SIVA runs an online platform that helps companies manage their digital marketing. They’ve been in business for 7 years, and have been building their online platform “Squad beyond” for 2.5 years.

SIVA’s product supports the long-term success of its users by visualizing and streamlining all resources and their traceability, starting from production and operation.

As of 2023, the Annual Recurring Revenue is approaching the high single-digit billions of yen mark, and the number of users has increased more than 25-fold in two years.

SIVA has hundreds of companies and thousands of customers, and a 98% retention rate.

SIVA’s growth in Japan was achieved by focusing on specific customer segments and niche areas and acquiring users in a sales-driven manner. As they expand overseas, they aim to broaden their customer base, centered on product-led growth gradually and are in the process of expanding the size of the organization.

A small number of employees make up the development organization. In order to improve long-term scalability, they are in the process of hiring foreign engineers and ramping up their agile development processes starting in 2023.

View SIVA's company page

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Senior Back-end Engineer at SIVA
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