QA Engineer (m/f/d)

Location

Calle Bergara 13

8002 Barcelona

Employment Area

IT - Development

Level

Experienced professionals

Working Model

Full-time

Reference ID

48223

Schwarz Digits creates the technological foundation for digital sovereignty in Europe. As the IT and digital division of the Schwarz Group, we develop and manage the IT infrastructures for the retail divisions Lidl and Kaufland, as well as Schwarz Production and PreZero. At the same time, we operate as an independent provider in the external market to support companies across Europe in their digital transformation. We bundle our core services in the areas of Cloud, Cyber Security, Data & AI, Communication, and Workspace.

Join us and contribute to digital sovereignty in Europe. With us, you will work at the intersection of agility and security: You will benefit from fast decision-making processes, enjoy genuine creative freedom in your projects, and be able to build upon the stable foundation of the Schwarz Group.

Your Tasks:

Full-lifecycle involvement: Participate in grooming, design reviews and definition of acceptance criteria (BDD/Gherkin).

Test assets ownership: Create, update and maintain the test suite covering squad products (mobile, web, API, data flows).

Code tests that test software: Build maintainable test code, helpers and fixtures; contribute to shared testing libraries/frameworks.

Functional testing: Compose, execute and assess results of tests according to the agreed Test Strategy (manual where it adds value, automated by default).

API & contract testing: Validate REST/GraphQL contracts and integrations (e.g., consumer-driven contract tests).

Non-functional testing: Execute performance, reliability, security (baseline) and accessibility checks where relevant.

Data-driven QA: Provide and track squad QA metrics (e.g., defect escape rate, flaky test rate, coverage trends, MTTR, lead time to detect).

Environment readiness: Collaborate on test data management, synthetic users and stable environments (containers/Kubernetes).

Quality advocacy: Spread a culture of quality, facilitate bug bashes/exploratory sessions, and coach teammates on testing good practices.

Release readiness: Contribute to go/no-go criteria, risk assessment and post-release validation.

Your profile:

Automation: Hands-on building UI and API automated tests (mobile and/or web) integrated into CI pipelines.

Agile delivery: Experience working within cross-functional agile teams.

BDD: Practical knowledge of BDD (Gherkin) and collaboration around acceptance criteria.

Mobile Frontend: Proven experience testing mobile apps (Android and/or iOS), including real devices/emulators/simulators.

API Testing: Strong experience testing REST/GraphQL services (functional and negative scenarios).

Programming: Experience coding tests and tools in Python (or similar: TypeScript/C#).

CI/CD: Experience in CI environments (e.g., Azure DevOps, GitHub Actions), including parallelization and flaky-test control.

Cloud & containers: Familiarity with Azure and/or Google Cloud, Docker/Kubernetes test environments.

Frontend testing: Experience with modern web stacks (React/React Native) and tools (Playwright/Maestro/Cypress/Appium/Detox).

The following skills would be a plus: Performance testing (e.g., k6/JMeter), baseline security (e.g., OWASP ZAP), accessibility (WCAG/axe) are a plus!

Telco Domain Knowledge: Previous engineering experience within an MVNO / MVNE will be a plus