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ElastiCache, SQS, S3, Secrets Manager), including deployment and operational troubleshooting\nWrite unit tests (JUnit 5 / ArchUnit) and end-to-end tests(Playwright) to uphold code quality and architectural constraints\nCollaborate with product, finance, and operations teams to turn PRDs into maintainable, extensible technical solutions\nRequirements\nBachelor's degree or above in Computer Science or a related field, or equivalent work experience\n5+ years of full-stack or front-/back-end engineering experience, able to independently deliver complete features from frontend pages to backend endpoints\nProficient in Java + Spring Boot (MyBatis-Plus, Spring Security, RESTful API design)\nProficient in React / Next.js + TypeScript, with a solid understanding of the App Router, componentization, and state management\nStrong command of PostgreSQL relational database design and SQL tuning, and of migration tools such as Flyway\nHands-on experience with AWS services, covering at least two of 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