Ios Developer Project Management

Enkhtsetseg (Enkee) Unurbayar

iOS Developer

San Francisco, CA *****.*****@*****.*** +1-415-***-**** LinkedIn SUMMARY

iOS Developer with 4 years of hands-on experience designing, developing, and deploying scalable and user-centric applications using Swift, Objective-C, SwiftUI, and UIKit. Proven expertise in building high-performance apps with modern architecture patterns such as MVVM, VIPER, and Clean Architecture. Skilled in integrating RESTful APIs, Apple Pay, Core Data, and AVKit while ensuring secure and accessible user experiences. Adept in CI/CD automation using Fastlane and GitHub Actions, with strong testing practices through XCTest, XCUITest, and performance tools. Passionate about delivering intuitive mobile solutions through cross-functional collaboration, critical thinking, and clean code practices. SKILLS

Languages: Swift, Objective-C, JavaScript, Java

Tools & IDEs: Xcode, IntelliJ, Visual Studio, Figma Version Control & CI/CD: Git, SVN, GitLab, Bitbucket, SourceTree, Azure DevOps, GitHub Actions, Jenkins, Fastlane, CocoaPods

Frameworks: SwiftUI, UIKit, Combine, RxSwift, Core Data, Realm, AVKit, Firebase, MapKit, Core Location Architecture: MVC, MVP, MVVM, VIPER, Clean Architecture, Coordinator, Redux, Dependency Injection, Design Patterns

(Factory, Singleton, Observer, etc.)

Testing: XCTest, XCUITest, Quick/Nimble, Snapshot Tests, Appium, Performance & Integration Testing, TDD, BDD APIs: RESTful APIs

Project Management: Agile, JIRA, Confluence, Trello Operating Systems: Linux, Windows, macOS

Soft Skills: Communication, Problem-solving, Team Collaboration, Time Management, Adaptability, Creativity, Attention to Detail, Critical Thinking, Self-motivation

EDUCATION

Master’s Degree in Computer Science Jan 2023 –

Present

Maharishi International University

CERTIFICATE

Front End Developer Nov 2020 – Feb 2021

General Assembly

Software Engineering Immersive Aug 2021 – Nov 2021 General Assembly

PROFESSIONAL EXPERIENCE

iOS Developer Jan 2024 – Present

Costco (Contract), Remote Atlanta, GA

• Contributed to developing customer-facing features in the Costco iOS mobile application, focusing on the Warehouse module used for in-store browsing and localized promotions.

• Orchestrated the successful migration from Objective-C to Swift for critical features resulting in 35% faster code and 76% better performance.

• Implemented and maintained UI components for real-time savings, personalized recommendations, and seasonal promotions, optimizing the Explore and Warehouse tabs using SwiftUI and UIKit.

• Integrated Apple Pay, Google Pay, and secure card processing for special holiday order forms, including a custom cake ordering feature tied to store availability.

• Collaborated with product and design teams to ensure WCAG-compliant UX for diverse shoppers, enabling seamless browsing across multiple Costco warehouse locations.

• Improved app performance and responsiveness through modular Swift architecture and device testing to ensure a smooth shopping experience across all iOS devices.

• Enforced enterprise-grade security via Face ID, Keychain for credential storage, SSL pinning, and device trust checks to secure sensitive warehouse and financial data.

• Involved in various parse-level applications and well aware of the parsing of SOAP, XML, and JSON formatted services for iPhone and iPad.

• Managed networking functionality with RESTful APIs. Ensured efficient data communication and synchronization for optimal app performance and user experience.

• Wrote unit and UI tests with XCTest/XCUITest. Performed regression testing and memory leak profiling using Instruments and Charles Proxy across multiple environments.

• Automated TestFlight builds and internal beta deployment pipelines using Fastlane and GitHub Actions for efficient release cycles and QA feedback loops.

iOS Developer Apr 2021 – Dec 2023

McKinsey & Company, San Francisco, CA

• Integrated real-time music control features, allowing users to manage and customize music playback seamlessly. Leveraged Combine for reactive data management and real-time updates.

• Overhauled the app’s old Objective-C codebase, transitioning to Swift, and increasing code usability by 35%

• Implemented Xcode and Interface Builder to increase UI consistency and decrease development time by 53%.

• Ensured the app provided an optimal viewing experience across multiple devices (smartphones, tablets, and desktops) by utilizing AutoLayout and SwiftUI’s native layout system.

• Incorporated media integration using AVKit and custom video players to enhance the user experience, enabling efficient handling of audio and video content.

• Created an interactive list of products within the app, allowing users to browse music items and related content, utilizing UICollectionView and List in SwiftUI for smooth, dynamic content presentation.

• Implemented a UI/UX test feature to track user interactions and suggest personalized music preferences, using Combine for reactive state management; ensured reliability through comprehensive testing with XC test, XCUITest, and Charles Proxy across multiple devices.

• Implemented MVVM architecture pattern with Core Data, increasing code maintainability and reducing the bug discovery- to-resolution rate by 25%

• Practiced critical thinking and creativity in resolving production issues, maintaining high app ratings through timely bug fixes and updates.

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