Senior Software Development Engineer Test

Kellton is seeking a Senior Software Development Engineer Test specializing in software test automation. The role focuses on building and maintaining automated tests for web, Windows desktop, and API applications, and mentoring QA engineers in automation best practices.

Responsibilities:

• Mentor QA engineers on automation best practices
• Provide guidance to QA engineers in automated testing best practices

Requirements:

• 4–6+ years of professional experience in software test automation or QA engineering, with hands-on ownership of automation frameworks
• Strong proficiency in Python, C# and XML scripting for test automation, with clean, maintainable, reusable code
• Hands-on experience building and maintaining UI test automation using Playwright (or comparable tools such as Selenium) for web applications
• Experience automating Windows desktop applications using tools such as pywinauto, WinAppDriver, FlaUI, or similar
• Experience logging, tracking, and reporting defects and test results using a defect or test management tool (e.g., Jira)
• Experience with cross-browser and cross-device test execution platforms (e.g., BrowserStack) and diagnosing environment-specific failures
• Solid working knowledge of Microsoft SQL Server, including writing T-SQL queries to set up, validate, and clean up test data
• Experience with XML and structured data files, including generating and validating files for import/export and integration testing
• Experience testing and automating RESTful APIs, and validating integrations between internal and external systems
• Strong understanding of the software development lifecycle (SDLC), QA methodologies, and test design techniques (regression, functional, integration, data-driven)
• Ability to analyze requirements and acceptance criteria, identify gaps, and translate them into complete, well-structured automated test coverage
• Skill in debugging flaky or failing tests, performing root-cause analysis, and clearly reporting defects to development teams
• Working knowledge of web accessibility (WCAG 2.1/2.2 AA) and an ability to include accessibility checks in automated test suites
• Mentor QA engineers on automation best practices
• Experience designing data-driven automation that covers multiple record-creation paths (e.g., manual entry, file import, API) and multiple academic/award years
• Experience with Excel-based test artifacts (e.g., openpyxl) for test data generation and reporting
• Exposure to CI/CD pipelines, automated test execution in build and release processes, and source control systems such as Git
• Familiarity with Agile/Scrum methodologies and experience working within sprint-based release cycles
• Experience supporting the migration or modernization of legacy desktop applications to web, including re-baselining automation suites
• Experience with performance, load, or security testing tools
• Familiarity with automated accessibility tools and assistive technology testing
• Strong written and verbal communication skills, with the ability to explain test results and quality risks to technical and non-technical stakeholders
• Provide guidance to QA engineers in automated testing best practices