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 (Postman/Newman, curl, Swagger/OpenAPI).
• Practical understanding of auth vs capture, refunds, webhooks, idempotency, and retries.
• Basic SQL (PostgreSQL): ability to validate records, joins, and state transitions.
• Experience with logs and monitoring tools such as Grafana, Kibana/ELK, Sentry or similar.
• Comfortable in Kanban, no-sprints, and fast-changing requirements.
• Good English (written and spoken) for remote asynchronous work.

Nice to have:

• Experience with PSPs (Stripe, Adyen, PayPal, Braintree, Worldpay, etc.).
• Experience with 3DS flows (frictionless vs challenge) and SCA constraints.
• Familiarity with test automation frameworks (pytest, Playwright) and CI (ability to read and maintain existing checks).
• Understanding of network tokenisation (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 / E2E validation: test REST APIs, async 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 PMs 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 Central European Time (CET) to ensure optimal collaboration and communication during working hours.