• Develop and execute: test plans, test cases, and test scripts for blockchain-based applications and APIs. • Design, implement, and maintain automated testing frameworks for functional, performance, and security testing. • Conduct manual and automate testing of transactions, wallets, payment systems, and decentralized applications. • Identity, document, and track defects using bug-tracking tools (e.g. Jira, GitHub). • Collaborate with developers to conduct feature reviews and ensure testability of new features. • Perform security testing to detect vulnerabilities in products. • Work closely with DevOps to integrate testing into CI/CD pipelines, and optimize test execution in cloud-based environments. • Conduct regression testing and maintain a robust suite of automated tests to prevent system failures. • Research and implement test practices for blockchain and fintech QA methodologies.