Sr Software Engineer, iOS

T-Mobile•Overland Park, KS

16h•Onsite

About The Position

At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees! Job Overview Are you ready to join the Un-carrier movement? We are seeking a highly skilled Sr iOS Software Engineer to contribute to the T-Life app—T-Mobile’s flagship mobile experience. In this role, you will design, develop, and deliver scalable iOS features that support high-quality user experiences for millions of customers. This role is essential for designing, implementing, and deploying scalable software solutions that meet customer requirements and support high availability environments. The role involves collaborating with engineers to develop software components using modern mobile technologies and architectural best practices. It requires independent judgment to resolve technical issues and contribute to software design decisions. Success is measured by delivering effective solutions that meet business and technical requirements.

Requirements

Bachelor’s degree + 5 years experience OR Advanced degree + 3 years experience
4–7+ years of software engineering experience
Experience building iOS applications using Swift and modern Apple frameworks
At least 18 years of age
Legally authorized to work in the United States

Nice To Haves

Experience with MVVM, MVC, or Coordinator patterns
Familiarity with AI-powered APIs or recommendation systems
Experience with CI/CD, Git workflows, and release processes
Understanding of iOS performance, memory management, and concurrency
Experience building consumer-facing applications at scale
Communication (Required)
Customer Service (Required)
Analytics (Required)
Technical Writing (Required)

Responsibilities

Develop software solutions and conduct testing to ensure quality deliverables, including scalable iOS features using Swift, SwiftUI, and UIKit
Contribute to design improvements using modern frameworks and patterns such as MVVM or Coordinator
Collaborate with cross-functional teams and mentor engineers through knowledge sharing
Evaluate and apply current iOS technologies aligned with business goals
Create documentation for code, system designs, and technical decisions
Contribute to medium-to-large initiatives and support scalable, maintainable mobile architecture
Integrate RESTful APIs and backend services, including support for AI-enabled features
Ensure quality through unit testing, performance optimization, and CI/CD participation
Follow security and app store compliance standards