Senior QA Engineer (Blockchain and crypto only)

We are looking for a strong Senior QA Engineer with solid experience in crypto processing and blockchain-based payment systems. Experience with major networks such as Solana, Tron, Litecoin, and Bitcoin is very important. The ideal candidate should have hands-on experience testing complex web applications, crypto transaction flows, wallet operations, deposits, withdrawals, confirmations, edge cases, API integrations, and business-critical financial systems. Strong knowledge of OpenAPI testing, webhook validation, API requests/responses, error handling, data consistency, and integration testing is required. The role involves ensuring the quality, reliability, and security of crypto processing workflows across multiple blockchain networks, including testing transaction statuses, reconciliation logic, reporting, analytics, and multi-tenant role-based access scenarios.