Principal Android Engineer – Lead Mobile Architecture

T-Mobile; Bellevue (WA); On-site; USD 206,000 - 211,000; Full time

Benefits offered by this job

Annual Stock Grant

Employee Stock Purchase Plan

401(k)

Referral program

Job summary

T-Mobile is seeking a Principal Android Engineer in Bellevue, WA to lead the design and delivery of large-scale Android apps. You will steer architecture, mentor engineers, and collaborate with cross-functional teams to create scalable mobile solutions.

You will drive Kotlin-based development, CI/CD practices, and code quality while aligning with business goals. The role offers a hybrid schedule and a comprehensive benefits package.

Qualifications

• Bachelor's degree or foreign equivalent in Computer Science, Computer Programming, Computer Engineering, or related field and 7 years of relevant experience.
• Alternative requirements: Master’s degree and five years of relevant experience.
• Requires experience in Android app design, architecture, and modern Kotlin tooling.
• Experience with CI/CD pipelines and code quality tools is essential.

Responsibilities

• Lead Android development: design, implement, test, and deploy Kotlin-based apps.
• Mentor engineers and drive architectural decisions across teams.
• Define standards for architecture, code reviews, and quality gates.
• Collaborate with product, UX, and backend teams to deliver scalable mobile solutions.
• Continuously improve performance, reliability, and testing practices.

Skills

Kotlin Android

Jetpack Compose

Android Architecture

Kotlin Coroutines

CI/CD

Gradle

Code quality

Leadership

GitLab/JIRA

Education

Bachelor's degree in CS/Engineering

Master’s degree in CS/Engineering

Tools

GitLab

Fastlane

Docker

SonarQube

Jenkins

Job description

T-Mobile is seeking a Principal Android Engineer in Bellevue, WA to lead the design and delivery of large-scale Android apps. You will steer architecture, mentor engineers, and collaborate with cross-functional teams to create scalable mobile solutions.

You will drive Kotlin-based development, CI/CD practices, and code quality while aligning with business goals. The role offers a hybrid schedule and a comprehensive benefits package.