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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Development Engineer in Test (SDET) - **Company:** Yrefy LLC - **Location:** Phoenix, AZ, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** .NET Framework, Application Programming Interfaces (APIs), Business Logic, Automation of Tests, C Sharp (Programming Language), Software as a Service, Code Coverage, Code Review, Computer Programming, Databases, Data Integrity, Database Testing, Software Debugging, JSON, Azure DevOps Pipelines, Standard Sql, Selenium, SQL Databases, Software Testing Automation Framework, Strategies of Testing, Web Applications, Delivery Pipeline, Cypress (Programming Language), Reliability of Systems, Backend, AngularJS, Information Technology, Playwright, Figma, Data Management, Api Management, SDET - **Published:** August 9, 2026 - **Apply:** https://www.wayup.com/i-j-Software-Development-Engineer-in-Test-SDET-Yrefy-LLC-190933765562680/ ## About the Role + Bachelor's degree in Computer Science, Engineering, or related field (or equivalent experience) + 4+ years of experience in test automation or SDET roles + Strong programming skills in C# and .NET + Experience with modern test automation frameworks (e.g., Selenium, Playwright, Cypress with C# bindings) + Hands-on experience testing Angular-based web applications + Experience with API testing (REST, JSON) + Strong working knowledge of SQL and database validation + Experience implementing tests in Azure DevOps pipelines + Solid understanding of Agile/Scrum development methodologies + Strong problem-solving and debugging skills What You'll Help Build + A scalable automation framework from the ground up + A quality-first engineering culture in a greenfield environment + Reliable, high-performing software used by investors and financial stakeholders + Efficient pipelines that enable fast, confident releases ## Description We're looking for a talented and driven Software Development Engineer in Test (SDET) to play a foundational role in building a next-generation Financial SaaS (FinSaaS) platform from the ground up. This is a true greenfield opportunity, where you'll help design and implement scalable test automation frameworks, shape quality engineering practices, and influence how testing is embedded across the entire development lifecycle from day one. In this role, you'll be defining how quality is engineered within a modern, cloud-based platform used by investors and financial stakeholders. You'll partner closely with our core engineering team to establish testing strategies, ensure system reliability, and enable high-velocity, confident releases. Your work will have a direct and visible impac t on product quality, user trust, and the company's ability to scale. If you're excited by the chance to build something new, drive a quality-first culture, and leave a lasting imprint on both the product and engineering organization, this role offers a unique opportunity to do just that., + Design, build, and maintain automated test frameworks using C# within a .NET ecosystem + Develop automated tests for web applications (Angular), APIs, and backend services + Partner closely with developers, product managers, and designers (Figma) to define acceptance criteria and test strategies + Integrate test automation into Azure DevOps CI/CD pipelines + Drive shift-left testing by embedding quality early in the development lifecycle + Create and execute functional, regression, integration, and end-to-end test suites + Validate data integrity and business logic using SQL and database testing techniques + Identify, triage, and track defects; collaborate with engineering teams on resolution + Contribute to code reviews with a focus on testability and quality + Establish and maintain test data management and test environments + Continuously improve test coverage, execution time, and reliability ## Related Videos - [Boost Productivity with AI: Figma & Playwright MCP Workflows - Aris Markogiannakis](https://www.wearedevelopers.com/videos/1768-boost-productivity-with-ai-figma-playwright-mcp-workflows-aris-markogiannakis) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Designing the Future of Human<>Agent Collaboration](https://www.wearedevelopers.com/videos/1447-designing-the-future-of-human-agent-collaboration) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [Testing .NET applications a Tool box for every developer](https://www.wearedevelopers.com/videos/704-testing-net-applications-a-tool-box-for-every-developer) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [What is Software Engineering?](https://www.wearedevelopers.com/magazine/289-what-is-software-engineering) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Where To Find Software Engineering Jobs](https://www.wearedevelopers.com/magazine/396-where-to-find-software-engineering-jobs)