Manual QA Engineer

Ruby Labs is a leading tech company that creates and operates innovative consumer products across the health, education, and entertainment industries.

• 3+ years in QA with strong manual testing fundamentals.
• Strong API testing skills using Postman/Newman, curl, Swagger/OpenAPI.
• Practical understanding of authorization vs capture, refunds, webhooks, idempotency, and retries.
• Basic SQL skills with PostgreSQL to validate records, joins, and state transitions.
• Experience with logs and monitoring tools such as Grafana, Kibana/ELK, Sentry or similar.
• Comfortable working in Kanban or continuous delivery environments with fast-changing requirements.
• Good English communication skills (written and spoken) for remote asynchronous work.

Nice to have:

• Experience with payment service providers (PSPs) like Stripe, Adyen, PayPal, Braintree, Worldpay.
• Experience with 3DS flows (frictionless vs challenge) and Strong Customer Authentication (SCA) constraints.
• Familiarity with test automation frameworks such as pytest and Playwright, and continuous integration (CI).
• Understanding of network tokenization (DPAN / network tokens).

• Manual testing: validate new features, fixes, and hotfixes across Web UI and APIs.
• Risk-based testing: define test scope based on financial and customer impact; call out residual risks.
• API / end-to-end validation: test REST APIs, asynchronous flows, and webhooks using Postman/Newman or equivalent.
• Data validation: verify state transitions and side effects in PostgreSQL; understand idempotency and retries.
• Regression ownership: maintain and continuously improve smoke and regression suites for critical payment routes.
• Incident-to-tests: convert production incidents into new regression cases or monitoring checks.
• Collaboration: work closely with engineers and product managers to clarify requirements, reproduce issues, and verify fixes.
• Release reporting: provide concise QA notes per release including scope, results, risks, and follow-ups.

Applicants must be located within approximately ±4 hours of the Central European Time (CET) zone to ensure optimal collaboration and communication during working hours.