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Coderio | Software Company • Cordoba, Córdoba, Argentina
Role & seniority: Senior Automation Engineer (C#-centric)
Stack/tools: C#, .NET 4.8 and .NET 8; Selenium or Playwright (.NET); API testing (REST/JSON); Azure DevOps; SQL; Page Object Model
Design, maintain, and scale a robust test automation framework across UI, API, and backend processes
Build and execute API automation tests for legacy and modern services; validate business logic independent of UI
Own Quality Gate in Azure DevOps and integrate automated tests into CI/CD pipelines; optimize pipelines for PR smoke tests and nightly full regressions; diagnose and fix flaky tests
5+ years of C# development with automation focus
Hands-on experience with Selenium or Playwright for .NET; strong Page Object Model usage
API automation proficiency; REST, HTTP, authentication, JSON
Azure DevOps integration (test execution, results, quality gates)
Solid SQL for test data prep and backend validation
Load testing (k6 or JMeter)
Hangfire (job status validation)
Docker/containerization for test envs
Location & work type: 100% remote, full-time, long-term, autonomy with international collaboration
About Coderio Coderio designs and delivers scalable digital solutions for global companies. With a strong technical foundation and a product-oriented mindset, our teams lead complex software projects from architecture to execution. We value autonomy, clear communication, and technical excellence. We work closely with international teams and partners, building technology that creates real impact.
🌍 More information: http://coderio.com
We are seeking a C#-centric Automation Engineer to play a key role in the modernization of mission-critical systems, supporting the migration from .NET Framework 4.8 to .NET 8 and from AngularJS to Angular 20. The role is focused on reducing regression risk by designing and owning a robust, scalable test automation framework across UI, APIs, and backend processes, with full responsibility for test quality and CI/CD integration in Azure DevOps.
What You Can Expect (Responsibilities) Design, maintain, and scale C#-based automation frameworks using Selenium or Playwright, applying clean architecture and SOLID principles.
Build and maintain API automation tests for legacy (.NET 4.8) and modern (.NET 8) services, validating business logic independently from the UI.
Own and manage the Quality Gate in Azure DevOps, integrating automated tests into CI/CD pipelines.
Configure and optimize pipelines to run smoke tests on PRs and full regression suites on nightly builds, ensuring reliability and fast feedback.
Validate backend and background processes through database queries and log analysis.
Actively detect, debug, and eliminate flaky tests, ensuring stable and trustworthy pipelines.
Handle complex asynchronous and dynamic behaviors using robust synchronization strategies.
Requirements 5+ years of strong C# development experience, with a developer-first mindset and ability to build complex, maintainable automation code.
Deep hands-on experience with test automation frameworks using Selenium or Playwright for .NET, including solid use of the Page Object Model.
Proven API automation experience, with strong understanding of REST principles, HTTP protocols, authentication, and JSON handling.
Experience integrating automated tests into Azure DevOps pipelines, including test execution, result publishing, and quality gates.
Solid SQL skills to prepare test data and validate backend transactions through database queries.
Nice to Have
Load Testing using k6 or JMeter.
Hangfire knowledge, including programmatic job status validation.
Docker / Containerization experience for spinning up test environments.
Benefits 100% remote
Long-term commitment with autonomy and impact
Strategic, high-visibility role within a modern engineering culture
Collaborative international team and strong technical leadership
Career development and growth opportunities within Coderio
Why Join Coderio?
At Coderio, we value talent regardless of location. We are a remote-first company, passionate about technology, collaboration, and fair compensation. We provide an inclusive and challenging environment with real opportunities for growth. If building impactful solutions motivates you, we’re waiting for you.
Apply now.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
Nivel de antigüedad Algo de responsabilidad Tipo de empleo Jornada completa Función laboral Control de calidad Sectores Consultoría y servicios a empresas, Servicios y consultoría de TI y Formación profesional y coaching