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 vigente 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, dependency control, and system obser

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