Sr. Engineer, iOS Mobile Development

Job Summary As a Sr. Software Engineer on the iOS Player team, you will develop client‑side libraries used by millions of people to stream live, on‑demand, and recorded content on iOS, iPadOS, and tvOS devices. About the Role The player SDK is written in Swift and powers the IP video playback experience on the Xfinity Stream app, Sky Sports, and other products. It provides a video player that integrates with HLS video streaming, content protection (DRM), advertising, emergency alert, and real‑time analytics services. The SDK strives to provide a high‑quality, consistent playback experience across all our integrations. Team and Collaboration Engineers on this team collaborate with software architects, platform engineers, data scientists, and other video streaming technologists. You will work daily on a small scrum team consisting of product owners, software engineers, automation engineers, and quality assurance engineers, and will collaborate with other technical teams across Comcast’s IP Video Engineering (VIPER) organization and external partners. Key Challenges The team operates in many environments with complex requirements. You will design flexible APIs, improve the reliability and feature set of our IP video platform, and support ad insertion and measurement for our advertising business. Impact Your code will be responsible for all IP video playback streaming at Comcast. It will run on millions of customers’ devices each week and will power the primary Comcast product they use. Responsibilities Build clean APIs for video playback on supported Apple devices Work extensively with Apple’s AVFoundation and related media frameworks Build reusable, well‑documented software components in Swift Design and implement end‑to‑end components related to video playback Analyze, optimize, and improve the codebase for performance and reliability Provide technical guidance and mentorship to other engineers on the team Participate in architectural decisions and advocate for API design best practices Collaborate with integrating teams to understand their needs and ensure successful adoption of the player SDK’s APIs Participate in code reviews and help maintain high engineering standards Support production reliability through incident response, debugging, and proactive monitoring Required Qualifications 7+ years of software development experience Proficiency in Swift development on Apple platforms Solid understanding of concurrency, threading, and asynchronous programming patterns Proficiency using Git for version control, branch management, and collaboration in a rapidly changing code environment Experience designing clean, concise, and maintainable APIs consumed by other engineering teams Strong understanding of protocol and proficiency with Proxy tools (e.g., Charles, Proxyman) Understanding of computer science fundamentals (data structures, algorithms, complexity analysis) Strong communication skills with the ability to clearly articulate complex technical issues Bachelor’s degree in computer science or equivalent experience Preferred Qualifications Familiarity with Apple’s media platform APIs including AVFoundation & AVKit Experience with HLS streaming video or other adaptive bitrate protocols Experience utilizing software design patterns, including protocol‑oriented approaches and dependency injection Proficiency implementing code using reactive paradigms (Combine) and concurrency (Swift Async/Await) Proficiency using Xcode’s testing tools (XCTest, SwiftTest) and experience working in Test‑Driven Development environment Experience using Swift Package Manager to deliver code libraries/frameworks Working knowledge of CI/CD pipelines (GitHub Actions) and automated testing strategies (unit, integration, UI) Working knowledge of Objective‑C / Swift interop when working with legacy code and 3rd‑party libraries Familiarity writing apps using Apple’s first‑party frameworks UIKit and SwiftUI Experience working with apps developed using hybrid & cross‑platform SDKs (e.g., Kotlin Multiplatform, Flutter) Experience with Xcode’s profile and instrument tools to identify and address performance issues Willingness to mentor junior engineers including pair‑programming and providing thoughtful, constructive feedback during code review Compensation and Benefits Primary location pay range: $136,996.33 - $205,494.49. Base pay is one part of the total rewards and is supplemented by benefits. Benefits include health, dental, vision, retirement, paid time off, and other programs that support you physically, financially, and emotionally. Equal Opportunity Employment We are an equal opportunity workplace. Comcast will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law. #J-18808-Ljbffr Blueface