We are Unlock Design, a recruitment agency based in Japan, and the job description below is an opportunity with one of our forward-thinking client companies. We aim to ensure a trustworthy and considerate experience for our candidates, emphasizing their privacy and long-term career goals. See our full promise and approach by visiting https://ud-

【Basic Information】

Client ID: 126000

Job ID: 1395

Position: サーバーサイドアプリエンジニア_

Location: Tokyo

Salary: 5M-12M JPY

Contract type: Permanent

Who we are

私たちは、金融・Fintech領域を起点に新しい事業やプロダクトを生み出すことで、より便利でスマートな世界を目指すDXカンパニーです。世界では今、様々なサービスに決済や送金などの金融機能が組み込まれ(Embedded Finance)、これまでにない価値や体験が生まれています。私たちは、日本社会全体のキャッシュレス・DXをリードする存在として、日々、社会の変革を推し進めています。

English Here:
We are a DX company aiming to create a more convenient and smart world by starting new businesses and products in the financial and fintech sectors. In the world today, various services incorporate financial functions like payments and money transfers (Embedded Finance), leading to the creation of unprecedented value and experiences. We strive to be a leader in promoting cashless and DX across Japanese society, driving societal transformation day by day.

Roles and Responsibility

決済センター・ゲートウェイシステムの企画・設計・開発・テスト・リリース、運用・保守を担当していただきます。

具体的には、
(1)サービス開発における要件定義〜詳細設計
(2)仕様書、設計書のドキュメント作成およびレビュー
(3)機能開発における改善/技術提案

【魅力・得られる経験】

• AWSを中心としたマイクロサービス・サーバレス化された技術・エンジニアリングに携わることができる
• ミッションクリティカルな決済システムにおいて最新技術やセキュリティをキャッチアップしながら、スピード感のある事業に携わることができる

【想定案件】 流通グループやタクシー会社など多様なクライアントに当社の決済端末「Anywhere」を導しております。今後も多様なクライント様への導入が予定されています。

• English here You will be responsible for the planning, design, development, testing, release, operation, and maintenance of the Payment Center Gateway System. Specifically,
  1. Requirements definition and detailed design for service development.
  2. Document creation and review for specifications and designs.
  3. Improvements and technical proposals for feature development.
  【Appealing Experience】
  • Involvement in technology and engineering centered around AWS, microservices, and serverless architectures.
  • Participation in fast-paced businesses while catching up with the latest technologies and security in mission-critical payment systems.
  【Projected Projects】 We have introduced our payment terminal, "Anywhere," to various clients, including major retail groups and taxi companies. We plan to continue introducing it to a diverse range of clients.

Minimum Requirements

• WebアプリケーションやAPI、バッチシステムの設計、開発の知識と経験
• 仕様書作成などのドキュメント作成力
• English here
  • Knowledge and experience in designing and developing web applications, APIs, and batch systems.
  • Document creation skills, including the ability to write specifications.

Preferred Requirements

• Web アプリケーションの脆弱性及びセキュリティ対策に関する知識と実務経験
• 決済システムにおける運用、セキュリティの知識
• ミッションクリティカルや大量トランザクションなどの特性を持つアプリケーションの設計・開発・テスト・運用経験
• マイクロサービス/サーバレス/コンテナ技術を用いたアーキテクト経験
• アプリケーションレイヤー・インフラレイヤー両観点での API やバッチ処理の性能改善知識・経験
• DevOpsやCI/CDに向けた技術選定や導入・運用経験
• Fintechや金融サービスに関する基礎知識・興味関心
• コンピュータサイエンスに対する基礎知識(学士・修士相当)
• English here
  • Knowledge and practical experience in web application vulnerability and security measures.
  • Understanding of operation and security in payment systems.
  • Experience in designing, developing, testing, and operating applications with characteristics like mission-critical and high transaction volumes.
  • Architectural experience with microservices, serverless, and container technologies.
  • Knowledge and experience in optimizing the performance of APIs and batch processing from both application and infrastructure perspectives.
  • Experience in technology selection, implementation, and operation for DevOps and CI/CD.
  • Basic knowledge and interest in Fintech and financial services.
  • Fundamental understanding of computer science (equivalent to a bachelor's or master's degree).

Tech Stacks

言語 :Java, Kotlin, Swift, Objective-C, Flutter(Dart),C#, C++, C, Python, PHP
インフラ :AWS, オンプレミス
ミドルウェア :Apache, NGINX, AWS Lambda, Hashicorp Vault, HAProxy, Corosync, Pacemaker, Redis, HULFT, Athena, QuickSight
DB :AWS Aurora, PostgreSQL, MySQL
Monitoring :CloudWatch, PagerDuty, Crashlytics
環境 :Terraform, Docker, AWS CodePipeline, Github, Firebase

Conditions / Benefits

Employment system: Full-time

Location: ojimachi, Chiyoda-ku, Tokyo

• Approximately 5 minutes on foot from Tokyo Metro Yurakucho Line "Kojimachi Station" (Exit 2).
• Approximately 8 minutes on foot from JR "Yotsuya Station."
• Approximately 9 minutes on foot from Tokyo Metro Marunouchi Line/Ginza Line "Akasaka-mitsuke Station" (Exit D).
• Approximately 10 minutes on foot from Tokyo Metro Hanzomon Line/Yurakucho Line/Namboku Line "Nagatacho Station" (Exit 7).

Annual Salary: 5,000, ,000,000 JPY ・based on experience, ability, and previous work experience

• Salary adjustments: Twice a year.
• Bonuses: None.
• Overtime allowance for excess overtime work (depending on job position/grade).
• Salary system: Monthly salary.
• Retirement allowance: None.

Hours: 9:30 - 6:30 (60-minute break)

• Flextime system, specialized discretionary labor system, or supervisor-based system may apply depending on the job position/grade.
• The mentioned time frame serves as the base, subject to employee discretion.
• Overtime work beyond regular hours may be required.
• Flextime system without a core time.

【Benefits】

• Various social insurance benefits (Welfare Pension, Health Insurance, Employment Insurance, Workers' Accident Compensation Insurance).
• Remote work support system (subsidy for purchasing equipment like monitors).
• Telecommuting allowance (3,000 JPY per month).
• Reimbursement of actual transportation expenses.
• Health check-ups.
• Employee stock ownership association.
• Onboarding/internal training.
• Circle activity support system.
• Company-wide networking events.
• Book purchase system (monthly limit of 10,000 JPY).
• Benefit Station.
• Support system for obtaining/maintaining qualifications *subject to eligibility criteria.
• Support system for attending business school *subject to eligibility criteria.
• Subsidy for seminar participation fees *subject to eligibility criteria.
• Relocation expense assistance *subject to eligibility criteria.

Holidays/Leave:

• Saturdays, Sundays, and national holidays.
• Annual paid leave (granted according to company regulations from the first day of employment).
• Refreshment leave (5 days granted according to company regulations).
• Year-end and New Year holidays (5 days).
• Sick leave (3 days).
• Other (celebratory and condolence leave, special leave, childcare/elderly care leave, etc.).

Probationary Period: 3 months

Interview Process

1. Document Review
2. First Interview
3. Aptitude Test
4. Second Interview
5. Offer

This process is subject to change.