Sr Software Engineer

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Job

Overview
Are you ready to join the Un-carrier movement?
We’re looking for a Senior Software Engineer who not only builds high-quality software but also ensures that it runs reliably and scales in production. This role blends advanced full-stack development with systems reliability practices, giving you end-to-end ownership — from architecture to code, deployment, observability, and mentoring.
Join us to deliver innovative, cloud-native systems that power T-Mobile’s customer experiences — and lead the way in shaping our engineering culture!

Job Responsibilities

Software Development

• Design, develop, and maintain full-stack web solutions, including front-end (Angular), back-end (Java/Spring Boot, microservices), and databases (Postgres, Oracle, SQL).
• Extend and optimize data storage mechanisms across relational and non-relational stores.
• Independently design and implement a complete software stack that meets business and customer needs.
• Collaborate in Agile teams, break down features into stories, and write clear documentation.
• Ensure secure coding practices and compliance with enterprise security standards.

Automation & Performance Testing (SDET Focus)

• Lead the design, implementation, and maintenance oftest automation framework sand reusable components.
• Translate business and functional requirements into test strategies and concrete deliverables.
• Develop high-quality, maintainable, and performant codefor automated test cases.
• Drive an automation-first strategy to minimize manual testing.
• Implement and execute performance, load, and scalability testing for distributed systems.
• Provide metrics and reporting on test execution, coverage, and software quality using tools such as Sonar Qube.
• Consult and mentor peers on best practices for test design, automation, and performance validation.

Technical Leadership & Collaboration

• Mentor and guide junior engineers in development and test automation best practices.
• Collaborate with architects, SREs, and cross-functional teams to design technical solutions.
• Contribute to the Test Community of Practice to evolve testing strategies and tooling.
• Advocate for continuous testing, performance improvements, and technical innovation.
• Act as a subject matter expert for full-stack development, automation, and Dev Ops practices.

Preferred / Nice-to-Have Skills

• Experience with business intelligence/reporting tools, especially Jaspersoft.
• At least 18 years of age
• Legally authorized to work in the United States

What You Bring

• Proven experience as aSenior SDET or Senior Software Engineer with a strong testing focus.
• Hands-on expertise intest automation frameworks(Selenium, JUnit, TestNG, or equivalent).
• Experience with performance/load testing tools (e.g., JMeter, Gatling).
• Strong background infull-stack engineering(Angular, Java/Spring Boot, SQL/Postgres/Oracle).
• Knowledge ofcloud-native architecture and containerization (Kubernetes, Docker).
• Familiarity with
  
  CI/CD pipelines and test integration (Jenkins, Git Lab).

• At least 18 years of age
• Legally authorized to work in the United States
• U.S. citizenship is required for this role. Individuals hired will need to submit documentation proving U.S. citizenship within the first 7 days of hire; failure to do so will result in termination.

Travel
:
Travel Required (Yes/No):
Yes

DOT Regulated
:
DOT Regulated Position (Yes/No):
No
Safety Sensitive Position (Yes/No):
No

Base Pay Range: $113,600 - $205,000

Corporate Bonus Target: 15%

The pay range above is the general base pay range for a successful candidate in the role. The successful 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…