Sr Software Engineer, Android

T-Mobile•Bellevue, WA

3d•$113,600 - $205,000•Onsite

About The Position

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. The Software Engineer is essential for designing, implementing, and deploying scalable mobile software solutions that meet customer requirements and support high-availability environments. This role focuses on Android application development within established architecture, collaborating with engineering teams to build modern, reliable features and integrate backend services—including AI-powered capabilities. Success is measured by the ability to deliver dependable technical solutions, produce clear documentation, and contribute to continuous improvement and innovation that enhances customer experience and supports business goals.

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 (Required)
Customer Service (Required)
Analytics (Required)
Technical Writing (Required)
At least 18 years of age
Legally authorized to work in the United States

Nice To Haves

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.

Responsibilities

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.