Our client is seeking a senior Software Development Engineer in Test (SDET) focused on Cards to design, implement, and maintain test automation that ensures robust, scalable delivery of card-related systems. You will work closely with cross-functional engineering teams to embed automated functional, integration, and performance testing into the development lifecycle and CI/CD pipelines. The role emphasizes hands‑on coding in C# /.NET, building test frameworks for UI and APIs, supporting REST API migrations from legacy SOAP/WCF services, and validating system resilience through load and performance testing.
Responsibilities
- Create test case scenarios for improving test coverage using C# and .NET.
- Design, build, and maintain automation frameworks for UI, API, integration, and performance/load testing.
- Develop and execute automated test suites to validate functional and non-functional requirements.
- Develop comprehensive test strategies for REST API migrations from legacy SOAP/WCF services.
- Perform end-to-end testing of API workflows,



including authentication and authorization flows.
- Validate OpenAPI/Swagger specifications against presente API implementations.
- Test adapter layer functionality between REST APIs and legacy SOAP/WCF services, ensuring backward compatibility during migration phases.
- Validate file-based interface translations and data integrity across systems.
- Perform regression testing on existing SCM and card-related functionalities throughout migration phases.
- Conduct integration testing with internal and external systems, including Presidio IVR systems.
- Validate OAuth 2.0 and MFA implementations across services.
- Integrate test automation into CI/CD pipelines using Azure DevOps, GitHub Actions, GitLab CI, or similar tools.
- Design and run load and performance tests to validate system resilience and scalability using tools such as JMeter or Gatling or LoadRunner.
- Create and maintain tools for test data generation, mocking, dependen

📌 SDET (Cards) (Argentina)
🏢 Resilientco
📍 Argentina