Backend Engineer

🕒 October 20, 2025

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PayPay Corporation

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2018

💳 Fintech

Fintech

PayPay Corporation is a company that offers convenient and advantageous payment solutions through its app 'PayPay'. With the app, users can easily pay using just their smartphone, whether at local stores, online services, or for bill payments. The company continues to innovate and expand, creating new value and engaging a diverse group of partners and team members from around the world. PayPay Corporation is committed to enhancing user privacy and security and maintains affiliations with various financial associations. It is part of the broader Softbank and LINE Yahoo Group, underscoring its integration within major technological and financial ecosystems.

📋 Description

• Design large-scale systems with high complexity to support our high throughput applications. • Understand how to leverage infrastructure for solving such large-scale problems. • Develop tools and contribute to open source wherever possible. • Adopt problem solving as a way of life – always go to root cause! Support the code you write in production. • Leverage AI/LLM-based tools for code development, reviews, testing, and documentation in daily workflows.

🎯 Requirements

• 4+ years of experience in using Java 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. • Strong 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 of English or Japanese. • Hands-on experience with AI/LLM tools (e.g., ChatGPT, GitHub Copilot, Gemini, CodeWhisperer, or similar) in professional software development.

🏖️ Benefits

• Social Insurance (health insurance, employee pension, employment insurance and compensation insurance) • 401K • Translation/Interpretation support • VISA sponsor + Relocation support