Java Backend QA Engineer, White-box Focus
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Job Description
Java Backend QA Engineer ensuring quality for financial and Web3 products through technical testing. Collaborating with developers and using AI tools for efficient testing in a fintech environment.
Responsibilities:
- Design and execute white-box and grey-box test strategies for Java-based backend services, including unit, integration, and API testing
- Read and analyze Java source code to identify edge cases, logic flaws, and potential risk points
- Build and maintain automated test frameworks and test tooling for financial backend systems
- Collaborate with developers on code reviews, test coverage analysis, and CI/CD pipeline quality gates
- Test and validate blockchain transactions, web3 wallet operations, and on-chain/off-chain data consistency
- Investigate production issues, trace root causes through logs, DB records, and service call chains
- Leverage AI tools (e.g., LLM-assisted test generation, log analysis, code review) to amplify testing efficiency
Requirements:
- 1+ years of experience in software testing or backend development
- Solid understanding of Java — able to read, write, and debug Java code confidently
- Hands-on experience with backend testing: REST APIs, message queues (Kafka), databases (MySQL/Redis)
- Familiarity with microservice architectures and distributed systems concepts
- Strong analytical mindset with attention to detail and a passion for breaking things (in a good way)
- Experience in fintech, crypto, or blockchain domain testing
- Knowledge of web3 wallets, on-chain data, or DeFi protocols
- Familiarity with Spring Boot, Dubbo, or similar Java frameworks
- Experience using AI-assisted tools in daily engineering work
- Exposure to white-box testing techniques: code coverage, mutation testing, static analysis
Benefits:
- Competitive salary and company benefits
- Work-from-home arrangement (the arrangement may vary depending on the work nature of the business team)
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