Senior QA Automation Engineer (AQA/SDET)

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Crystal Intelligence

Senior QA Automation Engineer (AQA/SDET)

Crystal Intelligence

Remote

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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

Key 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

About Crystal Intelligence

Crystal Intelligence, founded in 2018 as Crystal Blockchain within Bitfury Group and headquartered in Amsterdam with offices in London, provides blockchain analytics for compliance, investigations and risk monitoring. Its platform traces transactions across Bitcoin, Ethereum and numerous chains, linking addresses to entities, scoring risk and generating alerts for exchanges, banks and regulators. Used by financial intelligence units and VASPs to meet AML and Travel Rule obligations, Crystal combines clustering heuristics with case-management workflows. Now operating independently as Crystal Intelligence, the company serves institutions worldwide and is backed by Bitfury and leading investors. The team emphasizes accuracy, explainability and regulator-ready reporting. Expect a detail-oriented culture that values investigative rigor, data quality and helping make crypto markets safer and more transparent today.

crystalintelligence.com

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