Engineer, SDET

Job Overview

This role addresses technical challenges by translating business and functional requirements into test deliverables and systems, with a focus on the voice/IVR applications supporting our postpaid, prepaid, Assurance Wireless, Retail Store, and Metro by T-Mobile customer experiences.

It primarily involves developing, implementing, and sustaining test automation processes throughout software development and sustainment lifecycles, including advancing test execution from manual processes toward automated tests integrated into the CI/CD pipeline.

The role is distinguished by leading test automation strategy and creating maintainable, high-quality automated test code and frameworks across a complex, multi-application environment. Success is measured by the effectiveness of automated test execution, integration into delivery pipelines, and quality assurance outcomes.

The work impacts organizational software quality and reliability, supporting development teams and enhancing customer satisfaction.

Job Responsibilities

• Develop and maintain automated and manual tests — including test cases for voice/IVR applications — to measure product quality and support continuous delivery pipelines.
• Ensure requirements and user stories are testable and clarify ambiguities to support accurate test design and execution.
• Coordinate with development and operations teams across supported applications and business lines to uphold testing practices and meet quality thresholds.
• Design, develop, and maintain automation tools, systems, and test data to support development and testing activities, including validating application responses against expected test data and call flows.
• Also responsible for other duties/projects as assigned by business management as needed.

Education and Work Experience

• Bachelor's Degree plus 2 years of related work experience

OR combination of education and experience deemed equivalent

• Acceptable areas of study include Technical Discipline. Equivalent experience considered. (Preferred)
• 2-4 years Professional experience using 3 or more development languages (e.g., C#, Java, JavaScript, etc.). (Preferred)
• 2-4 years Professional experience using 3 or more automation tools (e.g., Selenium, TestNG, Appium, Sauce Labs, Rest Assured, Postman, Cucumber, Jasmine, Protractor, etc.). (Preferred)
• 2-4 years Professional experience with various testing methodologies and strategies: Test Driven Development, Behavior Driven Development, etc. (Preferred)
• 2-4 years Professional experience using CA Service Virtualization or equivalent. (Preferred)
• 2-4 years Professional experience using issue-tracking software and agile project management systems. (Preferred)
• 2-4 years Professional experience designing and developing applications on Unix or Windows environment, mobile platforms (Android or iOS) or designing complex multi-tiered applications. (Preferred)

Required Knowledge, Skills and Abilities

• Automated Testing
• Defects Management
• DevOps
• Java
• Requirements Analysis
• Scripting
• Software Testing
• Test Driven Development (TDD)
• Test Planning

Preferred Knowledge, Skills and Abilities

• Voice/IVR or speech-application testing experience
• GitLab and CI/CD pipeline experience
• Behavior-driven test scripting (e.g., Cucumber)
• Test data management and validation
• Critical thinking and ability to quickly ramp up on complex, multi-application systems
• Experience supporting multiple customer-facing business lines (e.g., postpaid, prepaid, Retail Store)
• At least 18 years of age
• Legally authorized to work in the United States
• Travel: Travel Required (Yes/No): Yes
• DOT Regulated: DOT Regulated Position (Yes/No): No
• Safety Sensitive Position (Yes/No): No
• Total Target Cash Earnings Opportunity: $82,800 - $149,385
• National Base Pay Range: $72,000 - $129,900

Pay and benefits

The Total Target Cash Earnings Opportunity represents the expected total cash compensation for this role at target performance, combining base salary and annual incentive opportunity. Actual earnings may be higher or lower depending on individual performance and overall company results.

The base pay range reflects the compensation component of this opportunity. The candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Corporate employees are eligible for a year-end bonus based on individual and/or company performance and which is set at a percentage of the employee’s eligible earnings in the prior year.

Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. The incentive component included in the Total Target Cash Earnings Opportunity reflects target performance. Actual earnings included in the Total Target Cash Earnings Opportunity reflect target performance; actual payouts may vary.

At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible.

We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - 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, and voluntary long-term care insurance.

We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs!

Never stop growing!

As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!

Talent comes in all forms at the Un-carrier. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.