OBJECTIVE

• Experienced iOS mobile applications engineer. Five years’ experience developing consumer enterprise applications. Experience working with private release and public facing applications including back - end applications.

SUMMARY

• Seasoned developing multithreaded workflows using both GCD and NSOperations.
• Extensive experience with design patterns such as MVC, MVVM, VIPER, KVO, KVC, Singleton, Delegate, Observer/Notification, Adapter, Factory, Façade.
• Well versed in parsing JSON and XML web service responses with both 1st party and 3rd party frameworks.
• Familiar with CocoaPods, AFNetworking, RESTKit, Alamofire, Codable, and JSONSerialization.
• Experience constructing application UIs using Storyboards, XIBs, and programmatically.
• Experience working with Core Data for persisting data between application sessions.
• Full understanding of Managed Object Model, Managed Object Context, Managed Object, and Persistent Store Coordinator.
• Familiar with local storage solutions like NSUserDefaults, Keychain, and Archiving.
• Experience with both SVN and Git for managing versions control.
• Worked in environments with continuous integration tools such as Jenkins.
• Great expertise in Agile/SCRUM methodology, and Waterfall
• Experience with Test Driven Development, both UI and Unit test, aiming for 80% coverage.
• Comfortable working as solo developer, as well as part of larger team, coordinating with other developers to deliver complex projects.
• Well versed with Onsite and offshore team coordination.
• Experienced in working with SQLite Database, Google Maps API and Apple MapKits, GPS Location, In-app billing, Push Notifications.
• Experience in following and implementing all Apple privacy guidelines for personal user data.
• Strong knowledge in all phases of Software Development Life Cycle (SDLC) process.
• Experienced in implementing multi-threading using both Grand Central Dispatch (GCD) and NSOperationQueue.
• Experience in integration of services using RESTful and SOAP Web Services.
• Good hands-on experience with Frameworks such as: UIKit, MapKit, Speech, AVFoundation, CoreData, CoreLocation, XCTest, Multimedia, QuartzCore, Crashlytics, Core Bluetooth, Core Graphics, AppKit and CoreMotion
• Proficient in source control with Git, Stash, SourceTree, SVN.

TECHNICAL SKILLS

Technologies: MS Visual Studio • GitHub• Eclipse • Git • MS Visio • NodeJS • Bootstrap iOS Tools: Instruments • CocoaPods • Carthage • Firebase • Cocoa Touch

Third-Party Frameworks: Reactive-X • RxCocoa • RxSwift • Firebase • Realm

Data Management: SQLite • Firebase Realtime • Database • Core Data • MongoDB

Troubleshooting & Testing: Memory Management • Instruments • Code Review • Unit Testing • TestFlight XCTest • Automated Testing

Languages: Swift • Objective-C • C++ • Python • Java • JavaScript/JSX • PHP • SQL • C# • Bash • ReactJS

Consuming Back-End Services: Alamofire • AFNetworking • REST • JSON • SOAP • XML • Reachability • API Writing

Classes: NSURLSession • URLSession • NSJSONSerialization • NSXMLSerialization • NSUserDefaults • NSNotificationCenter • NSOperationQueue

Project Environment: Agile Scrum • Continuous Integration • Test-Driven Development • Jira • Confluence

Source Control: Git • SVN • SourceTree

Push Notifications: Apple Push Notification (APNS) • Firebase Messaging iOS Frameworks: UIKit • UIDynamics • CoreLocation • MapKit • CoreBluetooth • CoreGraphics • QuartzCore, AVFoundation • CloudKit • CoreData • EventKit • Social

User Interface: Interface Builder • Storyboards • Xibs • Auto Layout • Adaptive layout • Storyboard • Nibs • Size Classes • UIKit • CA Layers • UIView • Animations • Core Plot • Core Graphics iOS Development: Concurrency - GCD • NSOperations • Delegation • Structs • Protocols

Architecture & Design: MVVM • MVP • MVC • VIPER • Decorator • Builder • Singleton • Abstract Factory • Integrator • Visitor • Proxy

PROFESSIONAL EXPERIENCE

Confidential | Pittsburg, PA

Sr. iOS Developer

Responsibilities:

• Design and implementation of responsive web practices and styling with popular CSS frameworks.
• Developed iOS application using agile development cycles, TDD techniques and code reviews to ensure reliability of code.
• Worked extensively with Swift, Objective and Cocoa frameworks.
• Developed Navigations between views using UINavigation Controller, UI Gesture Recognizer, and UI Popover Controller.
• Used auto layout constraint for different orientation and screen size.
• Responsible for Service Integration Development and Testing.
• Work on Multiview Applications customizing Navigation Bars and Tab Bars.
• Publishing the application on App store and then pushing updates after every sprint release.
• Designed the complete MVC flow for the application with UI components and controllers to be used for iPhone.
• Worked on NSOperations, GCD and Blocks to perform multi-threaded development and asynchronous service calls.
• Responsible for designing an Intelligent Asynchronous Cache Manager to separate the UI code from Service Call Code.
• Developed critical tools for this project like customized navigation bar, page control and scroll view.
• Extensively used Cocoa Frameworks such as SQLite, UIKit, Core Foundation, Core Data, AVFoundation and MapKit.
• Worked extensively on table view controller and made customized table view cells according to the client
• Pre-fetching data for different views for smooth screen transitioning.
• Followed a work data flow principle for design and development.
• Worked on web service calls, XML and JSON parsing included in the project.
• Added animation between UIViews for smooth transitioning and better user experience.
• Worked with Backend team to display the correct data format in devices.
• Used Key Chain for storing login credentials. And used Fortify for the application security.
• Followed a work data flow principle for design and development.
• Worked closely within a cross functional team of testers and developers.
• Debugging issues at onsite whenever required.
• Worked with GIT to checkout and update the codebase changes and Merging code using GITHub Enterprise, Creating Pull Request and participating in code reviews.

Confidential iOS Developer

Responsibilities:

• Design and implementation of responsive web practices and styling with popular CSS frameworks.
• Worked in Xcode for application development with Swift 4 for feature enhancement and performance.
• Worked with MVVM architectural pattern and Delegation, Notifications, KVC, and Singleton design patterns with RxSwift integration.
• Standardized and enforced the coding standards and best practices, including optimizing the apps for performance for App Store approval.
• AVFoundation was used to handle audio playback and video streaming.
• Regularly performed code reviews to ensure efficiency, readability, and maintainability.
• Worked with Core Data to prepopulate UITextFields with persisted data received in previously cached webservice calls.
• Added reminders with EventKit to remind users of upcoming events.
• Backend communications parsed with NSJSONSerialization and Decodable and placed into model objects.
• Adapted Core Animation and CALayer to crop and animate images over videos.
• Co-ordinated with backend team to implement proprietary APIs specific for the mobile application.
• Worked with Localization to the app to enable content tailored to a user’s language settings.
• UIAlertView to send alert message on system errors.
• Installed frameworks and tracked dependencies using CocoaPods.
• Worked with RESTful API to access the data from the backend using Alamofire.
• Resolved numerous bugs and crash scenarios using NSLogs, Breakpoints, Instruments and LLDB statements.
• Profiled the application extensively using Instruments to improve performance throughout multiple sprints.
• Administered source version control using Git for enterprise product development with Jenkins for continuous integration.
• Worked with Agile/Scrum methodology, participated in sprint planning, sprint retrospective, scrums, and code reviews.

Confidential iOS Developer

Responsibilities:

• Developed the iOS application in Swift and Objective-C using Bridging Headers.
• Worked on development of new banking app with a team of iOS developers, Front-End Designer, Project Lead and Product Manager.
• Developed layer to consume RESTful web service using AFNetworking.
• Developed dynamic views to create the front-end.
• Primary architecture used with MVVM and Singleton
• UI and application e-signing using Storyboards.
• Did developer test and fixed bugs to meet client specifications and standards.
• Worked on iOS development team in an Agile Scrum environment.
• Worked on GCD to build a responsive UI and implemented background threads.
• Implemented custom UI Tab Bar Controller, UI Navigation Controller, for easy navigation of the app.
• Used NSUser Defaults to store user information and save data locally.
• Customize UIElements, UIActionsheet, UIAlertView, UItableView, UICollectionView,
• UIScrollView in UI/UX implementations.