QA & Automation Engineer - AI/ML Applications

About the role

Merck is looking for a QA & Automation Engineer for AI/ML applications in Prague. The engineer automates and runs the tests that keep the team's Generative AI and Natural Language Processing (NLP) applications and services reliable and correct, supporting releases moving to production. The role sits in a cross-disciplinary team of data scientists, bioinformaticians and engineers focused on drug discovery and development, and offers a path toward SDET-level work on test infrastructure, framework design and CI/CD gating.

Key responsibilities

• Requirements validation: take part in requirement reviews, check for testability and gaps, and help define test cases and acceptance criteria
• UI test automation: build and maintain end-to-end UI tests for web apps running in CI/CD pipelines
• API testing: build and maintain automated API and integration tests for REST APIs and MCP servers, including contract tests
• Release confidence: execute test runs, validate releases and apply quality gates to keep defects out of production
• Data product testing: build mock datasets and end-to-end regression tests for data pipelines and their downstream APIs
• Quality insights: track and report quality metrics such as defect leakage, test coverage and test suite reliability
• Contribute to the QA strategy, adoption of test automation tooling and maintenance of testing frameworks
• Use coding agents to generate and extend tests and verify they cover the right behaviour and edge cases

Required profile

• 3+ years of professional experience in software testing, QA engineering or test automation
• 2+ years of experience writing and maintaining automated test suites integrated into CI/CD pipelines
• Experience automating tests for web applications and REST APIs

Required skills

• Automated testing and UI test automation
• Automation frameworks and integration testing
• RESTful APIs and Git
• Preferred: Generative AI, Large Language Models (LLMs), data visualization

What we offer

• Hybrid working model and flexible role pattern
• Competitive salary and incentive pay, pension and health insurance contributions
• 5 weeks annual leave, 5 sick days and 15 days of certified sick leave paid above statutory requirements
• Cafeteria with tax-free benefits, multisport card, Vodafone, bank and food delivery discounts, parking, showers and refreshments
• Professional growth through learning platforms, conferences and communities of practice