SDET, Cards

Resilient Co.

Senior SDET automating UI, API, integration, and performance testing for a fintech client’s card systems. Supporting REST migrations from legacy SOAP/WCF services across Latin America.

Posted 8/18/2026contractRemote • 🇦🇷 ArgentinaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in software test automation, particularly with C# and .NET, while effectively integrating automation into CI/CD pipelines. Proficient in developing and executing automated test suites for both functional and non-functional requirements, with a strong focus on API testing and validation.

Highest-signal resume keywords

C#/.NET ProgrammingAPI Automation with PostmanUI Automation Frameworks with CypressIntegration Testing with REST and SOAPCI/CD Integration using Azure DevOps

ATS Keywords

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Hard Skills

Test AutomationTest Case ScenariosREST API TestingOAuth 2.0 AuthenticationOpenAPI/Swagger ValidationNUnitJMeterAgile MethodologiesPerformance TestingLoad Testing

Soft Skills

MentoringCollaborationCode Review

Tools & Technologies

CypressSeleniumPostmanAzure DevOpsDockerKubernetesAWSGCPApplication InsightsDatadog

Industry Keywords

FintechHealth TechPaymentsRegulated Industries

Tech Stack

Tools & technologies

AWSAzureCloudCypressDistributed SystemsDockerGoogle Cloud PlatformJMeterKubernetes.NETSeleniumSOAPSplunk

About the role

Key responsibilities & impact

Create test case scenarios to improve test coverage using C# and .NET
Design, build, and maintain UI, API, integration, and performance/load automation frameworks
Develop and execute automated test suites for functional and non-functional requirements
Develop test strategies for REST API migrations from legacy SOAP/WCF services
Perform end-to-end API workflow testing, including authentication and authorization
Validate OpenAPI/Swagger specifications against API implementations
Test REST-to-SOAP/WCF adapter layers and backward compatibility during migrations
Validate file-based interface translations and cross-system data integrity
Perform regression testing on SCM and card-related functionality
Conduct integration testing with internal and external systems, including Presidio IVR
Validate OAuth 2.0 and MFA implementations
Integrate test automation into CI/CD pipelines
Design and run load and performance tests to validate resilience and scalability
Create and maintain tools for test data generation, mocking, dependency control, and observability
Collaborate with development teams on testability, shift-left practices, TDD, and clean code architecture
Participate in application and test-code reviews
Mentor engineers and QA team members in automation practices
Instrument tests and systems for observability and monitoring
Maintain automation for containerized and cloud environments

Requirements

What you’ll need

4+ years of experience in software test automation, SDET, or development roles
Strong programming skills in C#/.NET or a similar object-oriented language
Experience creating test-case scenarios using C# and .NET
Hands-on experience building UI automation frameworks with Cypress, Selenium, or Playwright
Hands-on experience building API automation with Postman, REST Assured, SoapUI, or similar tools
Strong understanding of REST, SOAP, and WCF protocols
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, API documentation, and contract validation
Experience with NUnit, MSTest, or xUnit
Hands-on experience with JMeter, 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 environments
Familiarity with Docker, Kubernetes, 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 regulated industries
Nice to have: debugging distributed systems
Nice to have: adapter-layer, file-based interface, and backward-compatibility testing
Nice to have: Presidio IVR integration testing
Nice to have: Application Insights, Datadog, or Splunk
Nice to have: mentoring developers and QA engineers in automation practices
Ability to work CST hours, 9:00 to 5:00PM
Must provide own device (BYOD)

Benefits

Comp & perks

Engagement length of 12 months or more
Overtime may be available at the same rate
BYOD (Bring Your Own Device)
Work remotely
CST working hours, 9:00 to 5:00PM