We are looking for a Senior iOS Engineer for an American pet product supermarket chain. This is a 3-month project. Responsibilities Design, develop, and maintain native iOS applications using Swift, ensuring high performance, reliability, and excellent user experience. Collaborate with cross-functional teams - including designers, product managers, and backend engineers - to deliver scalable and user-friendly mobile solutions. Requirements Core iOS Development 5+ years of hands‑on experience building and maintaining production iOS applications Expert in Swift (5.x+), with strong proficiency in SwiftUI and UIKit Deep understanding of iOS SDK, Foundation, and Core frameworks Skilled in using Xcode 14+ and modern iOS development tools Strong knowledge of Apple Human Interface Guidelines and iOS design principles Architecture & Design Patterns Experience implementing MVVM and modular, scalable architectures Solid understanding of dependency injection, inversion of control, and Clean Architecture concepts Experienced in using the Coordinator pattern to manage complex navigation flows Reactive Programming Advanced experience with Combine framework Familiar with RxSwift and reactive programming paradigms Strong grasp of asynchronous data streams and publisher‑subscriber patterns Networking & APIs Experienced in integrating GraphQL APIs using Apollo iOS client Proficient with RESTful APIs, HTTP/HTTPS, and WebSocket communication Strong understanding of concurrency and async programming in Swift Knowledgeable in API security and authentication methods (OAuth, JWT, tokens) Testing & Quality Assurance Experienced in writing unit tests with XCTest and UI automation tests Knowledge of TDD practices, mocking, and test doubles Familiar with code coverage and continuous testing tools Dependency Management Skilled with Swift Package Manager (SPM) and CocoaPods (for legacy support) Understanding of semantic versioning and dependency resolution Code Quality & Best Practices Proficient in maintaining code quality using SwiftLint and SwiftFormat Strong understanding of SOLID principles and clean coding standards Experienced in code reviews, debugging (LLDB, Instruments), and performance optimization Focused on maintainability, readability, and scalable codebase design Nice to have Experience with E-commerce & Retail, CI/CD & DevOps, Advanced iOS Features. We offer Opportunity to work on bleeding-edge projects Work with a highly motivated and dedicated team Competitive salary Professional development opportunities About Us Grid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI, supported by profound expertise and ongoing investment in data, analytics, cloud & DevOps, application modernization and customer experience. Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India. #J-18808-Ljbffr