Senior Test Automation Engineer

HelloPrint is on a mission to become the world's leading infrastructure for customizable printed products. From our offices in Rotterdam and Valencia, 100+ professionals from 20+ nationalities are building an AI-first company that scales output faster than headcount. We are rebuilding the platform: ecommerce, APIs, internal tooling, all under active development at speed. Speed without quality is just faster breakage. This role exists to make fast releases safe, and to turn QA from a bottleneck into leverage. About the Role At HelloPrint, our engineering teams are accelerating development cycles using autonomous and AI-assisted tooling. While AI makes generating code exponentially faster and cheaper, verifying that core business workflows and transaction guarantees remain intact stays just as complex. Without a rock-solid testing harness, higher code velocity simply translates to higher operational risk. We are looking for a Senior Test Automation Engineer to take technical ownership of our automated Platform Test Harness . In this role, you will design, build, and maintain the end-to-end and contract-testing architecture that enables our teams to develop with AI fearlessly, safeguarding our core customer and commerce flows under continuous delivery. What You Will Do Architect the Platform Test Harness for AI Velocity: Design, implement, and maintain deterministic E2E test suites using Playwright and TypeScript . Build the automated guardrails required to safely absorb high-frequency, AI-assisted code generation without regression. Implement Contract Testing & Boundary Validation: Establish strict API schema validations and contract tests (REST / JSON Schema) at service boundaries to prevent schema drift between our Product Catalog Engine, checkout services, and partner integrations. Shift-Left Quality in AI Workflows: Partner with Product Owners and software engineers during sprint refinement to define explicit boundary contracts and edge cases upfront—embedding a clear Definition of Done before feature code or AI prompts are executed. High-Speed CI/CD Orchestration: Maintain and optimize GitHub Actions test pipelines, focusing on smart test parallelization, artifact caching, and keeping feedback loops under 10 minutes. Accumulate Platform Memory: Partner with engineering during post-incident reviews to ensure every confirmed production defect results in an automated test that makes that specific failure path impossible to repeat silently. Collaborate & Mentor: Pair with our QA Automation Engineer and mentor software engineers in writing effective integration tests, adopting TDD habits, and reviewing AI-generated test scaffolding. What Success Looks Like After 12 Months Critical Journey Protection: 100% of primary commerce flows are guarded by automated E2E tests in CI. Fast & Stable Pipelines: CI test suite execution completes in under 10 minutes with a test flakiness rate below 1%. Defect Shift: At least 80% of functional regression