Hiring: Principal Engineers, Software Company: T-Mobile Location: Bellevue, WA Job Posted Time: 2026-09-17 10:23:46 Employment Type: Full-time Target Skills & Keywords : Accessibility, Android, CI/CD, Clean Architecture, Docker, GitLab, Gradle, Jenkins, Jetpack Compose, Jira, Kotlin, MVVM, SonarQube, Systems Design About the job Experience: •7 years of relevant work experience in any occupation in which the required experience is gained. •18 years of age •At least 18 years of age Required Skills: •Telecommuting is permitted, but applicant must work from the worksite location at least 3-4 days per week. No additional national or international travel is anticipated. •Expected to supervise base through senior level engineers as needed. •Presents project improvement scenarios to management for consideration. •Monitors and influence relevant industry technologies and standards. •Presents highly technical concepts to both technical and non-technical decision-makers. •Continuously learns, creates content, and teaches others specific subject areas. •Informally coaches and contributes to the development of others through mentoring or in house workshops and learning sessions. •Develops engineers across functional teams on technology decisions. Qualifications: •Bachelor’s degree or foreign equivalent in Computer Science, Computer Programming, Computer Engineering, or related, and 7 years of relevant work experience in any occupation in which the required experience is gained. •Master’s degree or foreign equivalent in Computer Science, Computer Programming, Computer Engineering, or related, and five (5) years of relevant work experience in any occupation in which the required experience is gained. •Designing and developing large-scale Android application using Kotlin, Jetpack Compose, and Android architecture components, ensuring compliance with Google Play publishing requirements. •Architecting modular, scalable, and testable Android solutions using Clean Architecture, MVVM, and established design patterns using Factory, Adapter, and Singleton to support longterm platform evolution and code maintainability. •Implementing asynchronous and reactive application flows using Kotlin Coroutines and Flow to manage UI state, background processing, and lifecycle-aware components for responsive and resilient Android applications. •Implementing continuous integration and deployment (CI/CD) pipelines using tools: GitLab, Fastlane, Docker, and SonarQube to automate build, test, and release processes and maintain high code quality across environments. •Optimizing app performance and reliability through benchmarking, profiling, and Android build tools: Gradle, Proguard; applying testing culture with frameworks Espresso to ensure quality, accessibility, and stability. •This position is eligible for the employee referral program. •Create a candidate profile, and apply to requisition number: REQ373671. Compensation: •$206,086 - $211,086 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!