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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.
Build and operate PayPay’s AWS-based data infrastructure using Terraform and Databricks, ensuring reliability, security, and smooth data workloads for the fintech platform.
About PayPay PayPay is a FinTech company that has grown to over 75M (as of August 2026) users since its launch in 2018. Our team is hugely diverse with members from over 50 different countries. OUR VISION IS UNLIMITED_…
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 improves internal security controls for a fast-growing fintech platform running on AWS, guiding teams on secure development and assessing risks across cloud and software.
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.
Principal Software Engineer at PayPay designing and scaling high-performance distributed systems for a 75M+ user fintech platform using Java/Kotlin/Scala, Kubernetes, and AWS/GCP.
Build and maintain web frontend features for Japan’s leading payments app using TypeScript, Vue.js/React, and modern DevOps tooling.
Design, operate, and optimize large-scale database systems for PayPay’s financial services, using MySQL, PostgreSQL, Aurora, and AWS while automating workflows with Terraform and Python.
Designs and maintains AWS-based cloud infrastructure for PayPay’s payment systems, ensuring scalability, security, and cost efficiency while automating deployments for developers.
Designs, builds, and secures AWS-based cloud infrastructure for a fast-growing fintech platform, automating deployments and ensuring high availability for payment and banking systems.
Backend Engineer at PayPay building and scaling high-throughput payment systems using Java/Kotlin, distributed databases, and AI-augmented workflows.
You will drive security initiatives across the organization, beginning with internal security consulting and the assessment, design, and improvement of security for internal tools. You will advise planning,…
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SoftBank Vision Fund