Senior Backend Engineer

Job Description

PayPay is seeking a Senior Backend Engineer to enhance their payment system and deliver exceptional payment experiences. This role involves designing large-scale, complex systems, leveraging infrastructure, and contributing to open-source projects. The engineer will adopt a problem-solving approach, support code in production, and participate in code reviews to maintain high-quality standards and ensure security.

Responsibilities:

• Designing large-scale systems with high complexity.
• Leveraging infrastructure for solving large-scale problems.
• Developing tools and contributing to open source.
• Supporting code in production.
• Participating in code reviews.
• Identifying performance improvements and optimizing applications.
• Collaborating with product managers and stakeholders.

Requirements:

• Excellent skills in Java or other programming languages (Scala, Python, Go).
• Experience with SQL and NoSQL databases, along with distributed cache.
• Strong fundamentals in data structures, algorithms, and object-oriented programming.
• In-depth understanding of concurrency and distributed computing.
• Experience implementing platform components such as RESTful APIs and Pub/Sub Systems.
• Experience with microservices.
• Experience designing high traffic systems.
• Degree in Computer Engineering or Computer Science or 5+ years equivalent experience.
• Business level English or Japanese.

PayPay offers:

• Hybrid workstyle with flexible remote and office options.
• Social Insurance (health insurance, employee pension, employment insurance and compensation insurance).
• 401K.
• Translation/Interpretation support.
• VISA sponsor + Relocation support.