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

Sr Software Engineer, Android

United States, Bellevue Employment contract 113600.00 - 205000.00 USD / Year · Job Posted June 17, 2026
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Job Description

We are seeking a highly skilled and motivated Android Software Engineer to join the team powering the T-Life app—T-Mobile's flagship mobile experience. In this role, you will contribute to the design, development, and delivery of high-quality, performant, and AI-enabled Android features that reach millions of users.

Job Responsibility

  • Develop and maintain Android application features using Kotlin and modern Android frameworks (e.g., Jetpack Compose) within established architectural patterns (e.g., MVVM, Clean Architecture)
  • Design and implement solutions that integrate RESTful APIs and backend services, including AI-powered endpoints supporting personalization and intelligent user workflows
  • Collaborate cross-functionally with Product, Design, QA, Backend, and AI teams to deliver high-quality mobile solutions
  • Write maintainable, testable, and scalable code
  • participate in code reviews and contribute to unit and UI testing
  • Create clear documentation for software code, system designs, and business requirements
  • Support CI/CD and release processes using tools such as Git, Gradle, and Fastlane
  • Monitor application performance and reliability to ensure secure, responsive user experiences across Android devices and OS versions
  • Present ideas to improve systems, processes, or services based on technical research and platform best practices
  • Mentor and coach junior engineers while providing technical leadership across cross-functional teams, promoting knowledge sharing, engineering best practices, operational excellence, and a culture of accountability and continuous improvement
  • Drive execution of daily operational activities, incident remediation, and service improvement initiatives, ensuring projects and operational commitments are successfully delivered through implementation, stabilization, and ongoing support
  • 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 Computer Science, Software Engineering, Information Management, or equivalent experience in field
  • 4–7 years of technical engineering experience
  • Proficiency in Kotlin and Android development frameworks
  • Strong understanding of Android app lifecycle, navigation, permissions, and performance optimization
  • Experience integrating RESTful APIs and handling asynchronous workflows (e.g., Kotlin Coroutines, Flow)
  • Familiarity with dependency injection (e.g., Dagger/Hilt) and modern build tools (Gradle)
  • Experience working with Git-based workflows and collaborative code review processes
  • Foundational exposure to AI-enabled backend services (e.g., LLM-backed APIs, recommendation systems)
  • Communication
  • Customer Service
  • Analytics
  • Technical Writing
  • At least 18 years of age
  • Legally authorized to work in the United States

Nice to have

  • Experience with Jetpack Compose for building modern, declarative Android UIs
  • Proficiency with Kotlin Coroutines and Flow for reactive and asynchronous programming
  • Exposure to AI-powered mobile features such as conversational interfaces, on-device inference, or recommendation experiences
  • Familiarity with AI-assisted development tools (e.g., GitHub Copilot, ChatGPT Enterprise, Claude) to accelerate coding, documentation, and code review workflows
  • Experience with app modularization and scalable multi-module Android architectures
  • Knowledge of Android accessibility standards and implementation (e.g., TalkBack, content descriptions)
  • Experience with CI/CD environments and mobile release management (e.g., Fastlane, GitHub Actions)
  • Familiarity with analytics and performance monitoring tools (e.g., Firebase, Instabug)
  • Experience working in Agile/Scrum development environments

What we offer

  • Annual stock grant
  • employee stock purchase plan
  • 401(k)
  • free year-round money coaches
  • medical, dental and vision insurance
  • flexible spending account
  • paid time off and 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
  • access to commuter and transit programs
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