Middle QA Engineer

Backend/API Testing | Blockchain | Remote

Responsibilities

• Design and maintain test plans, checklists, and test cases for backend services and blockchain-based components
• Perform manual testing of APIs, data flows, and microservices
• Conduct blockchain smart contract validation (read transactions, test contract behavior)
• Execute regression, and post-deployment testing
• Test transaction flows, error handling, and blockchain integration logic
• Analyze logs and monitor requests using tools like Postman, Charles Proxy, and Swagger
• Document test results, defects, and verification outcomes in a structured way
• Collaborate with backend developers, DevOps, and product managers
• Ensure compliance with security, performance, and functional standards

Qualifications

• 3+ years of experience as a Manual QA Engineer with a focus on backend/API testing
• Strong knowledge of SDLC, bug lifecycle, and testing methodologies
• Experience testing RESTful APIs, backend logic, and distributed services
• Hands-on experience with Postman, Swagger, Charles Proxy, and TestRail
• Basic familiarity with blockchain architecture, transaction flows, and smart contracts (Solidity or similar)
• Ability to write clear test documentation and reproduce complex bugs
• English: Upper-Intermediate (B1/B2) or higher
• Analytical thinking, clear communication, and initiative

We offer:

• Opportunity to work on a real-time blockchain-based trading platform
• Remote contract with flexible schedule
• Cross-functional team of 10+ professionals
• Exposure to blockchain systems and emerging technologies
• Challenging tasks and a tech-forward environment