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Open nowPosted 22 days ago

Senior QA Automation Engineer (AQA/SDET)

Crystal Intelligence16 open roles

Where
Kraków, Poland; Bucharest, Romania; Lisbon, Portugal; Vilnius, Lithuania
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Your applicationOpen nowSenior QA Automation Engineer (AQA/SDET)Crystal Intelligence · Kraków, Poland; Bucharest, Romania; Lisbon, Portugal; Vilnius, Lithuania

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The clock on this job

Early applications get read.

11.8% of postings close within 7 days. Measured by our own scanner across the market.

Share of postings closed within
  1. 2.1%1 day
  2. 4.4%3 days
  3. 11.8%7 days
  4. 18.6%14 days
  5. 35.6%30 days
  6. 45.1%60 days
This job: posted 22 days ago

The posting

Position Summary:

We're looking for a strong Senior QA Engineer with leadership experience — someone who can not only design and maintain automated testing for backend and data-heavy systems in the blockchain domain, but also shape the team's technical vision, influence architectural decisions, and own product quality on a long-term basis.

This is a fully remote role, and we welcome applications from anywhere in Europe.

More details: crystalintelligence.com

Duties and responsibilities:

  • Design, develop, and maintain automated tests for backend/API and frontend services and data-processing systems in the blockchain domain, including API, integration, contract, and data validation coverage
  • Create reliable test coverage for edge cases such as missing data, delayed data, and incorrect calculations
  • Analyze failed tests and production-like issues using logs, metrics, monitoring dashboards, API responses
  • Conduct code reviews
  • Pioneer new approaches, architectures, or frameworks that drive the business forward
  • Focus on long-term systemic planning, making high-level trade-offs across projects, and establishing technical vision
  • Prioritize testing efforts based on business needs, project risks, and delivery timelines
  • Identify process improvement opportunities and implement QA best practices
  • Evaluate and drive adoption of AI tools for QA and development workflows (e.g., AI-assisted test generation, code review, automation frameworks)
  • Define best practices and guidelines for using AI tools within the QA process, and help the team integrate them effectively
  • Collaborate closely with developers, business stakeholders, and cross-functional teams to improve testability, observability, and reliability of services
  • Maintain test documentation, automation coverage notes, and clear defect reports

Required:

  • 5+ years of AQA/SDET experience testing complex backend, API, data-heavy, or distributed systems
  • Deep understanding of SOLID principles and design patterns, hands-on experience applying them into test frameworks;
  • Solid SQL and PostgreSQL experience, including advanced queries, data validation, and investigation of data inconsistencies
  • Strong test design skills
  • Understanding of backend architecture, environment-based configuration, service health checks, and deployment validation
  • Strong Java programming skills for test automation
  • Hands-on experience with test automation tools and frameworks (e.g., Playwright, Postman, REST-assured or similar for API testing; Allure for reporting)
  • Experience of working with version control systems (GIT);
  • Experience working in Scrum or another Agile delivery process
  • Hands-on experience with AI-assisted development tools such as Cursor and Claude, including creating custom skills, agents, and rules to support QA/development workflows
  • Hands-on experience with AI no-code tools and business process automation (e.g., n8n)
  • Proficiency in English

Would be a plus:

  • QA technical leadership experience
  • Experience in performance testing
  • Python knowledge

Tech stack:

  • Languages: Java (primary, for test automation); Python (nice to have, such as backend is written on this language)
  • Database: PostgreSQL
  • Test automation: Playwright, Postman or REST-assured (API testing), Allure (reporting)
  • CI/CD: GitHub Actions
  • AI & Automation Tooling: Cursor or Claude for AI-assisted development, n8n for workflow automation (e.g., Jira ticket automation, bug-report pipelines)
  • Project & Collaboration Tools: Jira, ClickHouse, Mintlify, Drata (compliance tooling), Spira (test case management), Tailscale
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