SDET (Cards)

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 actual 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 observability.

• Collaborate with software development teams to promote testability, shift-left practices, TDD, and clean code architecture.

• Participate in code reviews for application and test code, providing actionable feedback on coverage and quality.

• Mentor engineers and QA team members in automation practices and support a culture of test-driven development.

• Instrument tests and systems for observability and monitoring to support debugging and performance analysis.

• Maintain and evolve automation to work reliably in containerized and cloud environments (Docker, Kubernetes, Azure/AWS/GCP).

Requirements

• 4+ years of experience in software test automation, SDET, or development roles.

• Strong programming skills in C# /.NET or a similar object-oriented language.

• Create and implement test case scenarios using C# and .NET to improve test coverage across application and integration flows.

• Hands-on experience building automation frameworks for UI testing using Cypress, Selenium or Playwright.

• Hands-on experience building API automation using tools such as Postman, REST Assured, SoapUI, or similar.

• Strong understanding of REST, SOAP, and WCF protocols and experience testing integrations between modern and legacy services.

• Experience testing OAuth 2.0 authentication flows and familiarity with MFA implementations.

• Knowledge of OpenAPI/Swagger specifications and experience with API documentation, contract validation, and validating specifications against actual API implementations.

• Experience with unit testing frameworks such as NUnit, MSTest, or xUnit.

• Hands-on experience building load and performance tests using JMeter or Gatling or LoadRunner.

• Experience integrating automation into CI/CD pipelines using Azure DevOps, GitLab CI, GitHub Actions, or similar..

• Experience working in Agile or Scrum development environments.

• Familiarity with containerized environments using Docker and Kubernetes and cloud platforms such as Microsoft Azure, AWS, or GCP.

• Experience participating in code reviews and providing feedback on test coverage and quality.

Nice to Have

• Background in cards, payments, fintech, health tech, or other regulated industries.

• Strong debugging skills in distributed system environments.

• Experience testing adapter layers, file-based interfaces, and backward compatibility across legacy and modern systems.

• Experience with IVR integrations, particularly Presidio IVR systems.

• Experience with observability and monitoring tools such as Application Insights, Datadog, or Splunk.

• Experience mentoring developers and QA engineers in automation practices

Engagement & Logistics

* Engagement Length:12 months or more.  
* Time Zone: CST (9:00 to 5:00PM)  
* Overtime Required: There may be some need for some over time hours depending on the amount of work, but it would be 1-2 hours for a couple of days at a time. The rate for those hours will be the same.  
* Equipment: BYOD (Bring Your Own Device)

Selection process  
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	1. Meeting with Resilient Co. team.  
	2. Technical interview  
	3. Cultural FIT/ Prep call with CSM  
	4. Project interview  
	5. Client interview (Hiring Manager call)