Software Development Engineer in Test (SDET) – Full Stack

Waystar • Louisville, KY

1d

About The Position

ABOUT THIS POSITION As a Software Development Engineer in Test (SDET), you will join an established, cross-functional product development team responsible for delivering high-quality software and data to our clients. You will own both automated and manual testing efforts across multiple products, partnering closely with engineers, product managers, and business stakeholders. This role is ideal for someone who thrives on autonomy, values clear communication, and is excited to use AI as a force multiplier to design thoughtful test strategies and robust automated solutions. You’ll be trusted to manage your work independently while proactively sharing risks, insights, and opportunities for improvement with the team. You will act as a quality champion, helping embed quality practices early in the development lifecycle and coaching others on modern testing and quality engineering best practices.

Requirements

• Bachelor’s degree in Computer Science or a related field (or equivalent practical experience)
• 3+ years of professional experience as an SDET designing, developing, and maintaining full-stack test automation for modern web applications and microservices
• Hands-on experience with Playwright and/or Selenium for end-to-end testing
• Strong programming skills in C#
• Intermediate proficiency with SQL
• Experience working with CI/CD pipelines
• Experience using Jira and/or Azure DevOps (ADO) to support agile project management, sprint work, and defect tracking
• Excellent written and verbal communication skills, with the ability to clearly explain risks, findings, and recommendations

Nice To Haves

• Comfort using AI tools as part of your daily workflow, with curiosity about how they can improve test quality and efficiency
• A proven ability to work independently while remaining highly communicative and collaborative
• A mindset that balances high standards with kindness, empathy, and respect for teammates
• Excitement about learning, improving systems, and contributing to something larger than your own individual tasks

Responsibilities

• Design, implement, and maintain complex automated tests (end-to-end, performance, load, scalability, and security) using tools such as Playwright and/or Selenium
• Leverage AI tools to: Create and refine test plans and test strategies Accelerate automated test creation and maintenance Analyze test results and identify coverage gaps Generate realistic and meaningful test data scenarios
• Take ownership of testing efforts for assigned products, managing your work autonomously while communicating progress, risks, and blockers early
• Collaborate closely with engineering, product, and business partners to understand requirements, architecture, and desired outcomes
• Champion a “quality-from-the-start” mindset by influencing design discussions, acceptance criteria, and release readiness
• Set and help drive clear quality expectations for each product release
• Document, track, and validate defects through resolution
• Continuously improve testing processes, tools, and frameworks that strengthen quality across the team and organization
• Contribute positively to team culture by being kind, collaborative, curious, and engaged in your work

Benefits

• Competitive total rewards (base salary + bonus, if applicable)
• Customizable benefits package (3 medical plans with Health Saving Account company match)
• We offer generous paid time off for our non-exempt team members, starting with 3 weeks + 13 paid holidays, including 2 personal floating holidays. We also offer flexible time off for our exempt team members + 13 paid holidays
• Paid parental leave (including maternity + paternity leave)
• Education assistance opportunities and free LinkedIn Learning access
• Free mental health and family planning programs, including adoption assistance and fertility support
• 401(K) program with company match
• Pet insurance
• Employee resource groups

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level