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T-Mobile Logo T-Mobile · IT - Software Development

Senior Sdet Engineer

United States, Philadelphia Employment contract 89400.00 - 161300.00 USD / Year · Job Posted June 17, 2026
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Job Description

This role addresses technical challenges by translating business and functional requirements into test deliverables and systems. It involves developing, implementing, and sustaining automated test processes and controls throughout software development and sustainment lifecycles. The role includes leading and consulting on test automation strategy, design, implementation, and execution. Success is measured by the quality, maintainability, and performance of automated test code and frameworks. The work impacts organizational quality standards and supports continuous delivery through collaboration and practice leadership.

Job Responsibility

  • Design and maintain automation systems and tools to improve testing efficiency and coverage
  • Provide practice leadership by training peers, contributing to quality standards, and managing defect processes
  • Ensure requirements and user stories are testable and provide input to test activities and estimates
  • Coordinate with development and operations teams to uphold testing practices and quality thresholds
  • Also responsible for other duties/projects as assigned by business management as needed

Requirements

  • Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience
  • Acceptable areas of study include Software Engineering, Computer Science or a related field or the foreign equivalent, and 5 years of progressively responsible postbaccalaureate relevant work experience
  • 4-7 years Professional experience using 3 or more development languages (e.g., C#, Java, JavaScript, etc.)
  • 4-7 years Professional experience using 3 or more automation tools (e.g., Selenium, TestNG, Appium, Sauce Labs, Rest Assured, Postman, Cucumber, Jasmine, Protractor, etc.)
  • 4-7 years Professional experience with various testing methodologies and strategies: Test Driven Development, Behavior Driven Development, etc.
  • 4-7 years Professional experience using CA Service Virtualization or equivalent
  • 4-7 years Professional experience using issue-tracking software and agile project management systems
  • 4-7 years Professional experience designing and developing applications on Unix or Windows environment, mobile platforms (Android or iOS) or designing complex multi-tiered applications
  • Automated Testing
  • Debugging Software
  • Defects Management
  • DevOps
  • Requirements Analysis
  • Scripting
  • Service Virtualization
  • Software Testing
  • Test Evaluation
  • Test Planning
  • At least 18 years of age
  • Legally authorized to work in the United States

What we offer

  • annual stock grant
  • employee stock purchase plan
  • 401(k)
  • free, year-round money coaches
  • medical insurance
  • dental insurance
  • vision insurance
  • flexible spending account
  • paid time off
  • up to 12 paid holidays
  • paid parental and family leave
  • family building benefits
  • back-up care
  • enhanced family support
  • childcare subsidy
  • tuition assistance
  • college coaching
  • short- and long-term disability
  • voluntary AD&D coverage
  • voluntary accident coverage
  • voluntary life insurance
  • voluntary disability insurance
  • voluntary long-term care insurance
  • mobile service & home internet discounts
  • pet insurance
  • commuter and transit programs
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