Remote from Argentina or Uruguay. This is a 6-month contract role with the possibility of extension. Ryz Labs is looking for a Senior QA Engineer to join one of our client's team. You will own quality across a React Native mobile app and a Next.js web experience, backed by Java/Spring Boot services behind a Node BFF. The work is hands-on: real devices, developer tools, logs, and APIs, not only clicking through the UI. The single most important non-technical trait we are hiring for is clear communication.
TESTING & INVESTIGATION
- Execute manual and exploratory test passes against web and mobile releases, working from acceptance criteria, designs, and your own curiosity about where things break.
- Use browser developer tools (console, network, elements, application storage, device emulation) as a first-line diagnostic tool, not just to confirm a bug but to narrow down where it lives.
- Debug our React Native application on real iOS and Android devices as well as simulators and emulators: reading native device and crash logs, using React Native's debugging tooling (Metro, the JS console,



React DevTools), inspecting network traffic, working with pre-release and over-the-air builds, and reproducing issues across OS versions and device classes.
- Use Datadog (logs, dashboards, error tracking, RUM/session replay) to triage reported issues, confirm whether a bug is client-side or server-side, and attach real evidence to a ticket.
- Test REST APIs directly, not just through the UI, validating request/response payloads, status codes, error handling, and edge cases for the Java/Spring Boot services and Node BFF.
- Validate auth/authorization and role-based access at the API level, not just what is visible in the UI.
- Test service-to-service and data-pipeline behavior, e.g. confirming events land correctly downstream rather than only checking the originating call succeeded.
- Test idempotency, retries, and failure/edge-case handling in backend logic.
- Write bug reports anoth

📌 Sr QA Engineer (Santa Fe)
🏢 Ryz Labs
📍 Santa Fe