IOS Developer

STONEGATE TECHNOLOGIES LLC; West Chester (Chester County); On-site; USD 120,000 - 170,000; Full time

Job summary

STONEGATE TECHNOLOGIES LLC in Chester, PA is seeking an experienced iOS Developer to design, build, and enhance native mobile experiences for customer self-service journeys.

Join a team delivering high-quality iOS apps with Swift, SwiftUI, and modern platform frameworks, collaborating across product, design, backend, QA, analytics, and release teams.

Qualifications

• 5+ years of professional iOS development experience.
• Strong proficiency in Swift and native iOS SDKs.
• Experience with SwiftUI and modular UI design.
• Experience integrating GraphQL/REST APIs and async data flows.
• Familiarity with MVVM/Coordinator architectures and unit/UI testing.

Responsibilities

• Build and maintain native iOS features for the Xfinity app using Swift.
• Translate requirements into accessible, responsive mobile experiences.
• Collaborate with product, design, backend, QA, and release teams.
• Integrate with GraphQL and REST APIs, incl. auth and state mgmt.
• Contribute to mobile architecture, reusable components, and standards.
• Write unit, UI tests and participate in CI/CD releases.

Skills

Strong communication

Team collaboration

Tools

Swift

SwiftUI

XCTest

GraphQL/REST

Git workflows

CI/CD

Job description

Role Summary

Design, build, and enhance native iOS experiences within the helping customers manage services, accounts, devices, and key self-service journeys through reliable, intuitive mobile experiences.

Job Title: IOS Developer

Location: Chester, PA (Onsite)

Long term

Role Summary

Design, build, and enhance native iOS experiences within the helping customers manage services, accounts, devices, and key self-service journeys through reliable, intuitive mobile experiences.

What You'll Do

• Build and maintain native iOS features for the Xfinity app using Swift and modern platform frameworks.
• Translate product requirements and UX designs into accessible, responsive, and reusable mobile experiences.
• Work with product, design, backend, middleware, QA, analytics, and release teams to deliver end-to-end customer journeys.
• Integrate mobile experiences with GraphQL and REST APIs, including authentication, error handling, data mapping, and client-side state management.
• Contribute to mobile architecture, reusable component libraries, engineering standards, and technical design discussions.
• Improve application performance, stability, security, accessibility, observability, and overall customer experience.
• Implement analytics, logging, experimentation, and feature-flag capabilities to support product measurement and controlled releases.
• Diagnose and resolve complex production issues across the mobile app, APIs, network interactions, and integrated services.
• Write unit, integration, and UI tests using XCTest, XCUITest, and UI automation frameworks.
• Participate in Agile delivery, code reviews, CI/CD practices, release readiness, and continuous improvement activities.

Required Qualifications

• 5+ years of professional iOS application development experience, preferably on large-scale consumer applications.
• Strong proficiency in Swift and native iOS SDKs.
• Hands-on experience with SwiftUI, reusable UI components, navigation, and responsive layouts.
• Experience integrating GraphQL and/or REST APIs and managing asynchronous data flows, caching, and complex client-side state.
• Practical knowledge of MVVM, Coordinator, or Clean Architecture and modular application design.
• Experience with XCTest, XCUITest, and UI automation frameworks.
• Strong understanding of iOS application lifecycle, privacy permissions, background execution, and Apple platform guidelines.
• Experience using Git-based development workflows, pull requests, code reviews, and CI/CD pipelines.
• Strong debugging, problem-solving, communication, and cross-functional collaboration skills.

Preferred Qualifications

• Experience developing customer-facing apps in telecommunications, broadband, connected home, media, payments, billing, or account management domains.
• Experience with backend-driven or server-driven UI, JSON schema-based rendering, or configurable customer journeys.
• Familiarity with OAuth 2.0, secure storage, identity, session management, API security, privacy, and mobile security practices.
• Experience with mobile analytics, crash reporting, performance monitoring, feature flags, and A/B experimentation.
• Familiarity with Xcode, Swift Package Manager, and modern Apple development tools and App Store release processes.
• Experience supporting applications with high availability, broad device coverage, and frequent production releases.
• Exposure to cross-platform frameworks such as Flutter is a plus, while strong native platform expertise remains the primary requirement.

SUCCESS IN THIS ROLE

• Delivers high-quality mobile features that simplify customer journeys and increase self-service completion.
• Builds maintainable, testable solutions that align with shared mobile architecture and design standards.
• Works effectively across mobile, middleware, backend, product, and quality engineering teams to bring features safely into production.