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. Job Responsibilities:Develop software solutions and conduct testing to ensure quality deliverables, including scalable iOS features using Swift, Swift. UI, and UI - Kit. 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. Qualifications. 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. Preferred. 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. Knowledge, Skills and Abilities: - Communication (Required) - Customer Service (Required) - Analytics (Required) - Technical Writing (Required)At least 18 years of age. Legally authorized to work in the United States. Travel:Travel Required (Yes/ No): Yes. DOT Regulated:DOT Regulated Position (Yes/ No): No. Safety Sensitive Position (Yes/ No): No. Compensation Range:Overland Park: $123,800 to $167,400 Frisco: $131,300 to $177,700 Base Pay Range: $113,600 - $205,000 Corporate Bonus Target: 15%The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance. To find the pay range for this role based on hiring location, ID=REQ 350329¶dox=1