Back End Developer - Remote/Hybrid

*We are only able to accept applicants with valid permission to work in Japan and fluency in Japanese. Thank you for your kind understanding. ---------------------【Leading Domestic Payment & FinTech Ecosystem】 ■Position: Backend Engineer (Global Team)■Location: Tokyo Head Office (Remote/Hybrid)■Work Style: Hybrid Work / Flexible Hours■Salary: 8M-12M JPYThis role drives the evolution of a revolutionary mobile asset management service built upon a massive payment platform used by tens of millions of users nationwide. ■ Responsibilities・Develop, deploy, and continuously optimize robust backend application systems for a fast-growing, highly accessible digital asset management product.・Architect and design highly complex, large-scale distributed systems capable of sustaining massive transaction volumes and ensuring low-latency performance.・Leverage modern cloud infrastructure and DevOps best practices to resolve deep-rooted system challenges and guarantee exceptional scalability.・Engineer custom internal tools to streamline development workflows and actively contribute to the open-source community to drive industry standards.・Adopt a rigorous, problem-solving mindset to investigate bottlenecks, trace systemic issues to their root causes, and proactively eliminate technical debt. ■ Requirements・3-5 years of backend dev for in-house products・Proficiency in Java/PHP, or Scala/Python/Go・Experience with NoSQL and distributed caching・Strong grasp of data structures and OOP・Deep knowledge of concurrency processing・Business English OR Japanese (JLPT N1) ■ Preferred Qualifications・Implementation of RESTful APIs or Pub/Sub・Hands-on experience with AWS services・Dev experience in highly scalable web systems ■Salary8,000,000 JPY ～ 12,000,000 JPY ■JOB ID: VAC-292489 *Finish your application by filling out the required information.We look forward to your application.