Job Summary:
We're hiring an Software Development Engineering in Test (SDET) to embed with our Platform team. Platform builds the shared services every Neumo application consumes: reporting, payments, search, authentication, messaging, file handling, and more. Our guiding principle is build once, use everywhere -- and that means quality has to scale the same way.
This is not a QA-at-the-end role. You'll be in the room when we design services, shaping what 'done' means before a line of code is written. You'll execute against an established QA strategy and set of frameworks, with QA leadership provided by a senior team member who has deep context on how everything fits together. Your focus is on building and running great tests -- across unit, integration, contract, and end-to-end layers. Because Platform services are consumed by many products simultaneously, a defect here is a defect everywhere. You'll own quality as a first-class concern, not an afterthought.
Duties and Responsibilities:
- Design, build, and maintain automated test frameworks across unit, integration, contract,



and end-to-end layers for Node.js shared services.
- Participate in service design and API reviews from day one, contributing a quality-engineering perspective before implementation begins.
- Build and maintain CI/CD test pipelines that give the team fast, reliable feedback on every commit.
- Own test coverage for multi-tenant scenarios: tenant isolation, data separation, per-tenant configuration, and cross-tenant security boundaries.
- Write and maintain automated tests against AWS-native infrastructure -- Lambda, EventBridge, SQS/SNS, API Gateway -- including event-driven and async patterns.
- Define and enforce API contract testing so downstream product teams can integrate with confidence.
- Instrument test runs for observability: flakiness tracking, coverage trends, and test health dashboards.
- Monitor and track quality metrics -- test coverage trends, defect escape rates, flakiness -- a

📌 Software Development Engineer in Test (Guadalajara)
🏢 Neumo Holdings
📍 Guadalajara