Software Development Engineer in Test (SDET) (Mexico)

Full Time Professional Guadalajara, Jalisco, MX

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 das

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