Software Development Engineer in Test SDET

Yrefy LLC; Phoenix (AZ); On-site; USD 100,000 - 130,000; Full time

Benefits offered by this job

100% Employer Paid Medical for Employee and Family

401k/Roth Plan with 4% Match

Fully Paid LifeTime Gym Membership

Student Loan Repayment Assistance

Catered Friday Lunches

Job summary

Yrefy LLC based in Phoenix, Arizona is seeking a talented Software Development Engineer in Test (SDET) to build a next-generation Financial SaaS platform. In this role, you’ll design scalable test automation frameworks and influence quality engineering practices within the development lifecycle.

Ideal candidates have strong experience in C#, test automation frameworks, and collaboration in Agile environments. The position offers a flexible onsite work environment and numerous benefits including employer-paid medical and a 401k plan.

Qualifications

• 4+ years of experience in test automation or SDET roles.
• Strong programming skills in C# and .NET.
• Hands-on experience testing Angular-based web applications.

Responsibilities

• Design, build, and maintain automated test frameworks using C#.
• Develop automated tests for web applications, APIs, and backend services.
• Integrate test automation into Azure DevOps CI/CD pipelines.

Skills

C#

Test automation

SQL

Agile/Scrum methodology

API testing

Angular testing

Education

Bachelor’s degree in Computer Science or related field

Tools

Selenium

Playwright

Cypress

Azure DevOps

Job 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 impact 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.

Key Responsibilities

• 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

Required Qualifications

• 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

Benefits include

• 100% Employer Paid Medical for Employee AND Whole Family (includes the Mayo Clinic)
• 401k/Roth Plan with 4% Match and Immediate Vesting
• Dental Insurance
• Vision Insurance
• Company Paid Life Insurance
• Company Paid Short-and-Long-Term Disability Insurance
• Fully Paid LifeTime Gym Membership (if at least 8 visit days/month)
• Student Loan Repayment Assistance and Education Assistance
• Catered Friday Lunches
• Stocked Snack Kitchens
• Fun in-Office Work Environment
• Opportunity to Work at a Fast-Growing Company
• And More!

Work Environment

This is a primarily onsite role with genuine flexibility. Core collaboration hours are 10 AM – 3 PM; manage your full schedule around that. Need a morning at home for an appointment? Handle it. We don’t track hours or micromanage — we hire professionals and treat them accordingly. We encourage experimentation, learning from mistakes, and continuous improvement across teams.