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iOS developer

San Jose, California, United States
December 03, 2017

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Jin Um

San Jose, CA

Authorized to work in the US for any employer

Work Experience

iOS Developer

Self Employed

July 2017 to August 2017

Lingrape is a platform that language learners can learn foreign languages more fun.

• Designed and built the app to solve language learner's problems.

• Implemented Photo Sharing, Chat, Video Recording / Sharing, SpeechRecognition, Map, Search/Filter, Profile, Follow/Report features.

• Handled photo sharing features and camera features with UIPickerViewController.

• Implemented custom camera session for video recording and speech recognition to display text.

• Extensive experience with Firebase DB / Firebase Cloud handling.

• Handled image data with JPEGcompression and stored the data in Cloud Storage.

• Strong knowledge in implementing frameworks like CoreLocation, CoreGraphics, MapKit and UIKit, Frameworks.

• Hardcoded UI programmatically and setting Constraints with NSLayoutConstraint and NSLayoutAnchor for the readable code and AutoLayout.

• Added animation between UIViews for smooth transitioning and better user experience.

• Implemented Social Login Features such as Google, Facebook, Twitter for User experience.

• Experienced with cache image data.

• Debugged and fixed lots of additional trivial problems.

• Created of push notifications with Firebase Cloud Functions(Beta) in Javascript for HTTPS requests.

• Updated for iOS 11 and iPhone X.

iOS Developer

Self Employed

BombList is a simple task manager app with the deadline for productivity.

• Designed and Developed the app

• Implemented Core Data for persistent storage of user data.

• Implemented side menu, social account connection, and deadline features.

• Objective-C Open Source Library, Objective-C header file integration.

• Custom UI implemented (drawing bomb) with UIBezierPath. iOS Developer

Self Employed

Archer AR is an Augmented Reality Archery Game.

• Designed and Developed entire app based on SceneKit and ARkit

• Created custom 3D Models and Planes.

• Strong knowledge of SCNPhysicsBody and Collisions for Contact Delegate

• Added sounds with AVFoundation, handling an audio file with AVAudioPlayer and added custom fonts for better user experience.


BS in Management of Information Systmes

University of Ulsan

Additional Information


iOS*, Swift*, Javascript, NodeJS, CSS/HTML, Java, C++. IDE/Tools: XCode, Eclipse, Interface Builder, Storyboards. Design Tools: Sketch

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