PayPay Securities

FinTech

BackendEngineer/バックエンドエンジニア

United States FULL TIME Remote Friendly
Market Sentiment
HIGH DEMAND

Neural analysis suggests this role is
optimal for Mid candidates.

The Brief

“Backend Engineer / バックエンドエンジニア at PayPay Securities. Skills: Backend Application development, Java/PHP development, System design, Large scale systems design, High throughput applications. Develop and operate the Backend Application system for PayPay Securities product. Design large scale systems with high complexity to support our high throughput applications”

What You'll Achieve.

Expand business to change the structure of asset management in Japan; Support top management’s decision

Industry & Context.

FinTech
Problems you'll solve

Identify issues on their own; Problem solving as a way of life; Always go to root cause!; Leverage infrastructure for solving such large scale problems

Eligibility Requirements

Japan Residents Only

What They're Looking For.

Must Have

3-5 experience in developing Backend Application for company products, Experience in using Java/PHP under professional environment, or if you are non-Java user, excellent skills in generalized programming languages, such as Scala, Python and Go., Interest and ability to learn other coding languages as needed., Experience with NoSQL databases and distributed cache., fundamentals in data structures, algorithms and object oriented programming, In-depth understanding of concurrency and distributed computing, Degree in Computer Engineering or Computer Science or 5+ years equivalent experience in SaaS platform development, Business level in either English or Japanese (JLPT N1)

Nice to Have

Experience with implementing platform components such as RESTful APIs, Pub/Sub Systems, Database Clients, Experience with AWS services, Experience in system design, development of web system which handles massive amount of transactions or requires scalability, Experience with Microservices, Experience in working for system development in securities, finance, or similar industries, Experience in developing inhouse Product/Service

What You'll Do.

Develop and operate the Backend Application system for PayPay Securities product

Design large scale systems with high complexity to support our high throughput applications

Understand how to leverage infrastructure for solving such large scale problems

Contribute to open source wherever possible

How You'll Work.

Team & Collaboration

Collaborating with engineers, designers and QAs; Work together with others to create new value; High-level coordination with departments and affiliated companies within PayPay Group

Communication Scope

Business level in either English or Japanese (JLPT N1)

Full Job Description

About PayPay Securities / PayPay証券について PayPay is a FinTech company that has surpassed 70 million users (as of July 2025) in 7 years since its launch in 2018, is rapidly expanding its business scale as a payment platform used by approximately one out of every two smartphone users in Japan. PayPay Securities Corporation provides a unique and familiar asset management service that anyone can easily use in their daily lives as a specialized smartphone brokerage firm that can be used through PayPay. As a member of the PayPay Group, we are refining our products at an overwhelming speed that no other company can imitate, and we will promote the spread of cashless payments in Japan and the financial life platform that uses them at a dash. We are looking for people who are passionate about these things as professionals, who can identify issues on their own, and who can work together with others to create new value. ※ Please note that you cannot apply or be selected in parallel with PayPay Corporation, PayPay Card Corporation and PayPay Securities Corporation. 2018年にサービスを開始してから約7年でユーザー数7,000万人(2025年7月時点)を突破したフィンテック企業である「PayPay」は日本国内においてスマホユーザーのおよそ2人に1人が使用する決済プラットフォームとして急速に事業規模を拡大しています。 PayPay証券株式会社は「PayPay」から使用できるスマホ専業証券会社として「資産運用」を日常の中で誰もが簡単にできるユニークで身近な資産運用サービスを提供しています。 他社に真似できない圧倒的なスピードでプロダクトを磨き上げ、日本のキャッシュレス決済、またそれを使用した金融ライフプラットフォームとしての普及を一気に推進することにプロフェッショナルとして情熱を持って取り組み、ユーザーの為に新しい価値創出を共に推進する仲間を募集します。 ※ PayPay証券株式会社へご応募いただく際にはPayPay株式会社、PayPayカード株式会社へ併願応募はご遠慮いただいております。ご了承ください。 Job Description / 業務について PayPay Securities, as an important part of PayPay’s financial ecosystem, has launched “Point Management” with over 20 million users and “PayPay Asset Management, the first initiative in Japan that enables asset management on a payment application. Now that the business foundation of the financial ecosystem is finally in place, we intend to expand our business to change the structure of asset management in Japan, with the main target being those who have not yet started asset m

Free ATS check

Applying for this Backend Engineer / バックエンドエンジニア role?

Most applicants get filtered before a human reads their resume. See if yours makes the cut.

How to Apply on Greenhouse

  • Create a Greenhouse profile before applying — it saves time across multiple applications.
  • Upload your resume as a PDF; the parser handles it better than Word.
  • Answer all knockout questions carefully — wrong answers auto-reject before a human sees you.
  • Enable email notifications to track application status in real time.

ANONYMOUS · UNFILTERED

What do employees actually say about PayPay Securities?

Real rants from real employees. Read before you apply.

Read Company Rants →