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Build and maintain the core banking backend in C and Java, designing high-performance, reliable microservices for a rapidly growing fintech platform with 70M+ users.
Designs and executes automated and manual tests for PayPay’s fintech apps and APIs, using tools like Appium, Playwright, and AI assistants to ensure quality and reliability of banking and payment systems.
Build and run Java/Kotlin backend services for PayPay’s core banking platform, designing scalable microservices on AWS with Spring Boot, Kafka, and Redis while ensuring high reliability for a 70M-user fintech app.
Designs and maintains highly available, scalable microservices on Kubernetes and AWS to ensure flawless FinTech service for 70M+ users, using observability tools and incident response.
Senior Data Science Engineer or Senior Machine Learning Engineer at PayPay builds and deploys ML models for fraud detection, recommendations, and insights, using Python, SQL, and cloud tools in a hybrid Tokyo office.
Backend Engineer at PayPay building and scaling high-throughput payment systems using Java/Kotlin, distributed databases, and AI-augmented workflows.
Designs and executes automated tests for PayPay's mobile, web, and API systems, using AI tools to validate features and AI/ML components while improving QA standards.
You will develop and operate Java and Kotlin backend applications for core banking systems. You will design reliable, high-performance applications and architecture, select middleware, use infrastructure to resolve…
You will develop test scenarios and detailed test cases for functional and non-functional requirements across mobile, web, and API products. You will prepare test data, tools, and environments; execute automated and…
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SoftBank Vision Fund