Backend Engineer

Summary

Join PayPay, a rapidly growing FinTech company with over 65 million users, as a Backend Engineer. You will design and develop large-scale, high-throughput payment systems. Leverage your expertise in Java or other programming languages to solve complex problems and contribute to open-source projects. This role requires 3+ years of Java experience or equivalent skills in other languages, strong fundamentals in data structures and algorithms, and experience with NoSQL databases. Enjoy a flexible work-from-anywhere arrangement in Japan with competitive benefits, including comprehensive health insurance, 401k, paid time off, and a special paid leave system.

Requirements

• 3+ 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 3+ years equivalent experience in SaaS platform development
• Business of English or Japanese

Responsibilities

• 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 the root cause! Support the code you write in production

Preferred Qualifications

• Experience with implementing platform components such as RESTful APIs, Pub/Sub Systems, Database Clients
• Experience with AWS services
• Experience in working for system development in finance, payment, or similar industries
• Experience in system design, development of web system which handles massive amount of transactions or requires scalability
• Language ability in Japanese and English is a plus (We have a professional translator but it is nice to have language skills)
• Experience in microservices

Benefits

• Social Insurance (health insurance, employee pension, employment insurance and compensation insurance)
• 401K
• Translation/Interpretation support
• VISA sponsor + Relocation support
• Work From Anywhere at Anytime
• Super Flex Time (No Core Time)
• Every Sat/Sun/National holidays (In Japan)/New Year's break/Company-designated Special days
• Annual leave (up to 14 days in the first year, granted proportionally according to the month of employment. Can be used from the date of hire)
• Personal leave (5 days each year, granted proportionally according to the month of employment）
• ���PayPay's own special paid leave system, which can be used to attend to illnesses, injuries, hospital visits, etc., of the employee, family members, pets, etc
• Annual salary paid in 12 installments (monthly)
• Reviewed once a year
• Special Incentive once a year *Based on company performance and individual contribution and evaluation
• Late overtime allowance, Work from anywhere allowance (JPY100,000)
• ���Payroll payment can be changed to digital salary payment “PayPay Paycheck” for an amount set by you