Principal Software Engineer – iOS

T-Mobile

Principal Engineer, Software role at T-Mobile creating scalable software solutions for customer requirements. Collaborating with engineers and influencing technology decisions for advanced software capabilities.

Posted 4/24/2026full-timeBellevue • Texas, Washington • 🇺🇸 United StatesLead💰 $133,500 - $240,700 per yearWebsite

Tech Stack

Tools & technologies

iOSObjective-CSwift

About the role

Key responsibilities & impact

Define and evolve the iOS engineering vision, setting architectural standards and long-term direction
Serve as a cross-functional leader across product, design, backend, QA, AI, and executives
Drive mobile technology strategy by identifying platform and industry inflection points
Evaluate and apply technology strategies that align with business goals
Champion technical clarity through org-wide documentation standards

Requirements

What you’ll need

Bachelor's Degree plus 7 years of related work experience OR Advanced degree with 5 years of related experience
Acceptable areas of study include Computer Science or Engineering
7-10 years Technical engineering experience
Experience developing iOS applications using Swift, Objective-C, SwiftUI, and the iOS SDK.

Benefits

Comp & perks

medical, dental and vision insurance
flexible spending account
401(k)
employee stock grants
employee stock purchase plan
paid time off
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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

iOS developmentSwiftObjective-CSwiftUIiOS SDKarchitectural standardsmobile technology strategytechnical claritydocumentation standardsengineering vision

Soft Skills

cross-functional leadershipcommunicationcollaborationstrategic thinkingproblem-solvingorganizational skillsinfluencingteam leadershipstakeholder managementadaptability

Certifications

Bachelor's DegreeAdvanced Degree