SUMMARY:

• Self - motivated and organized professional with over 6 years’ of experience providing innovative and latest-technology-driven software development using production environment and architectural best practices; an extremely dependable, passionate, and proactive problem solver and team leader with a natural tendency to mentor others
• 6 years of iOS mobile application development experience, building iPhone and iPad apps using Xcode, Objective-C, and Swift 3, 4
• Implemented strong architectural design utilizing best coding practices and design patterns including Singleton, Delegate, Observer, and Façade
• Experienced working with UI/UX implementation using Auto Layout, Size Classes, Xibs, and programmatic UI
• Worked with multiple core frameworks for advanced functionality including Bluetooth, Core Location, MapKit, Core Animation, Core Graphics, and AVFoundation
• Worked with data persistence using UserDefaults, Core Data, Property Lists, Settings Bundle, and SQLite
• Familiar in consuming RESTful web services and JSON parsing
• Developed fluid multithreaded applications using GCD and NSOperations
• Securely implemented user authentication with Touch ID, Face ID and Keychain for sensitive data
• Participated in all aspects of the entire Software Development Life Cycle, including requirements gathering, design, coding and testing
• Proficient knowledge in memory management with MRR and ARC
• Tested application performance and memory consumption in TDD methodology using XCTest and Instruments

TECHNICAL SKILLS:

Operating Systems: iOS, macOS, Windows 7, 8, 10

Languages: Objective-C, Swift 4, C, C++

PROFESSIONAL EXPERIENCE:

Sr. iOS Developer

Confidential, Pittsburgh PA

Responsibilities:

• Created vibrant, custom UI components according to wireframes for various screens throughout the app with programmatic and Interface Builder approaches using Xibs.
• Securely retrieved customer data using delegation with RESTful HTTPS calls with URLSession and Certificate Pinning.
• Migrated project from Swift 3 to Swift 4 and replaced JSON serialization from JSON Serialization object with new Codable protocol - additionally, worked to refactor select legacy Objective-C code into Swift 4.
• Worked with a Singleton pattern to persist a user’s information throughout the signed-in experience.
• Developed new screens with MVVM design pattern to separate concerns from complex ViewControllers and user data.
• Implemented Core Data to store some user information in the phone, utilized the Keychain to securely store minimal amounts of sensitive information.
• Raised awareness to properly integrate Face ID for new iPhone X and created a timely fix before it was available for consumers.
• Integrated internal frameworks via CocoaPods for secure encryption and communications and utilized Crashlytics for crash reporting.
• Adjusted releases to App Store for conformance to changes in the App Store Submission Guidelines, with adherence to Human Interface Guidelines (HIG).
• Project managed using Agile/Scrum methodology; code delivered in 2 weeks sprints, complete with daily standups and demoing sessions during retrospectives with critical stakeholders.
• Worked as lead of development team composed of 4 iOS developers, a dedicated QA team and the backend server team.
• As lead, guided and mentored junior developers via paired programming, and code reviews to avoid pull request merge conflicts into the master branch.
• Collaborated with Android team to establish parity between the two native implementations.
• Participated in utilizing and preparing automated testing with XCTest and continuous integration with Jenkins, task-tracking with Jira, inter-team communications through Slack, SVC with Git, and pull requests with BitBucket.

Sr. iOS Developer

Confidential, Bellevue WA

Responsibilities:

• Worked in an existing hybrid codebase utilizing Swift 2 and Objective-C.
• Customized UI components using Core Graphics and CALayer, including UIViews, UIButtons, UITableViews, UITabBars, etc to provided wireframes and mocks.
• Worked extensively to improve the UI/UX fluidity by multithreading individual processes.
• Performed backend RESTful API calls made using URLSession for requests and responses using callbacks and delegation.
• Refactored codebase to ensure secure webservice requests by using HTTPS
• Utilized JSONSerialization to parse the information received from the server.
• Project managed using Agile/Scrum methodology; code delivered in 2 weeks sprints.
• Executed unit tests within Xcode using the XCTest library.
• Implemented Core Data to store sensitive user information in the phone, utilized the Keychain to securely store minimal amounts of sensitive information.
• Helped in the creation of a generic module for Push Notifications
• Lead code reviews with developers in the development process and collaborated to solve any problems that arose.
• Actively reviewed codebase, detecting bugs before they appeared and provided solutions in a timely manner.
• Developed in both production and QA environments, adjusting the codebase for the two different schemes to segregate testing.
• Worked on a mobile team composed of several other iOS and Android developers, 1 designer, a dedicated QA team and the server team.

Sr. iOS Developer

Confidential, New York, NY

Responsibilities:

• Developed app to work in conjunction with Confidential ’s online web app for synchronized behavior.
• Collaborated closely with backend team to communicate concepts to properly implement new features and functionality.
• Communicated with server using URLRequests and REST services and as well as Push Notifications.
• Deserialized real-time information using XML and JSON parsing for use in app.
• Leveraged NSOperations for a deeper control of the execution sequence for communications with backend service.
• Implemented UI design in combination of Xibs and Storyboards with Auto Layout and Size Classes to deploy to both iPhone and iPad devices.
• Worked on several custom UITableViews to adequately present interactive data.
• Collaborated with a design team to develop custom Views and IBDesignables for improved design.
• Utilized Gitflow to submit code for review, perform peer code reviews, and made pull requests.
• Isolated and resolved errors using Instruments.
• Traced bugs and development issues using NSLogs, LLDB, and Breakpoints.
• Mentored new team members and junior developers and engaged in paired programming to help introduce them to the codebase.

iOS Developer

Confidential

Responsibilities:

• Developed using Objective-C.
• Participated in all aspects of the development process, from requirements gathering to testing and debugging.
• Actively engaged in solving different communications problems between the app and user devices.
• Migrated scenes from centralized Storyboards into individual Storyboards and Xibs
• Customized standard UIControls; UIButton, UISwitch, UISlider, UISegmentedControl; for an improved user experience.
• Set up communications between the app and devices for GET and POST requests and responses.
• Set up UI components to properly convey loading states to a user when retrieving data.
• Sought out causation of issues when debugging using LLDB and Breakpoints.

iOS Developer

Confidential, Seattle, WA

Responsibilities:

• Developed using Objective-C.
• Used Xibs and programmatic Constraints to enhance application UI/UX according to provided wireframes.
• Implemented additional features and screens for an increased ease-of-use for customer satisfaction.
• Redesigned several screens to better fit newer devices and refactored codebase for iOS 6.
• Worked with SQLite to persistently store the user’s favorite businesses and retrieve relevant information.
• Invoked RESTFul web services for searching functionality and handled JSON responses using NSJSONSerialization.
• Performed complex tasks in background threads using GCD to improve UI fluidity.
• Resolved bugs and improved app performance using Xcode debugger and Instruments.