Senior QA Automation Engineer (AQA/SDET)
Crystal Intelligence7 hours ago
Kraków, PolandSenior
Responsibilities
- Design, develop, and maintain automated tests for backend/API, frontend, integration, contract, and data-processing systems.
- Build test coverage for edge cases including missing data, delayed data, and incorrect calculations.
- Analyze failed tests and production-like issues using logs, metrics, monitoring dashboards, and API responses.
- Conduct code reviews and pioneer testing approaches, architectures, and frameworks.
- Shape technical vision, make high-level trade-offs, and plan testing strategy across projects.
- Prioritize testing based on business needs, project risks, and delivery timelines.
- Identify process improvements and implement QA best practices, guidelines, and documentation.
- Evaluate and integrate AI-assisted QA and development tools, including custom skills, agents, and rules.
- Collaborate with developers, business stakeholders, and cross-functional teams to improve testability, observability, and reliability.
- Maintain automation coverage notes, test documentation, and clear defect reports.
Requirements
- 5+ years of AQA/SDET experience testing complex backend, API, data-heavy, or distributed systems.
- Strong Java programming skills for test automation and solid SQL and PostgreSQL experience, including advanced queries and data validation.
- Deep understanding of SOLID principles and design patterns, with hands-on experience applying them to test frameworks.
- Strong test design skills and understanding of backend architecture, environment-based configuration, service health checks, and deployment validation.
- Hands-on experience with Playwright, Postman, REST-assured, Allure, or similar testing and reporting tools.
- Experience with Git and Scrum or another Agile delivery process.
- Hands-on experience with Cursor and Claude, including creating custom skills, agents, and rules for QA and development workflows.
- Hands-on experience with AI no-code tools and business process automation such as n8n.
- Proficiency in English.
- QA technical leadership experience, performance testing experience, and Python knowledge are preferred.
Benefits
- Fully remote role open to applicants anywhere in Europe.
About Crystal Intelligence
Crystal Intelligence builds blockchain analysis and transaction monitoring software for financial institutions, law enforcement agencies, and regulators. Offerings include a free blockchain explorer plus subscription SaaS and APIs for investigations and AML compliance using real-time on-chain intelligence; the privately held company was founded in 2016 and is headquartered in Amsterdam, Netherlands.