Image de profil de koryo520
Drapeau de China Yanji, China
Membre depuis le 22 mai 2015
5 Recommendations


En ligne Hors ligne
Dear Client. I am a Software Engineer focusing on mobile development with extensive experience in mobile app, such as an iOS and Android SDK, Objective-C, Cocoa Touch, UIKit, Swift, Java. I believe that the combination of my technical expertise, problem solving skills, and business sensibilities would serve well in this position. I'm most experienced in following categories.  - Social networking: Like & Share, Dating service, Events management, Messaging services  - Photo & Video: Photo-booth style, Greeting card, Frame & Caption  - Catalogue: Real-estate, Hotel & Flight, Food & Recipe booking,  - Geo location navigation: Travel, Find near  - Lifestyle: Fashion & Shopping  - Health & Fitness: Workout, Bodybuilding Training. My core skill-set: ✔ Native: iOS and Android  ✔ Web service: XML/JSON, REST/SOAP  ✔ Device, Kit: Bluetooth Low Energy (BLE), iBeacon, Datzing, NFC ✔ Cloud backend: , Parse SDK, Parse REST, Amazon S3 EC2 AWS, ✔ MySQL, SQLite, Oracle, SQL Server, ODBC  ✔ Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest ✔ Google Map,, Geolocation, GPS ✔ iAd, Admob, Chartboost,  Flurry, Testflight  I’ve rich experiences in iOS8 app development and Swift as well so please contact me if you need to make new iOS8 application or need to update the app to iOS8.  I am seeking opportunities to build large mobile projects from the ground up for you or your business but any small projects are welcome. Looking forward to working with you soon. Warm Regards.
$50 $ US / h
16 commentaires
  • 75%Travaux complétés
  • 89%Selon le budget
  • 100%Dans les temps
  • N/ATaux de Réembauche


Avis récents

  • image de marinalexandernd Mobile development $65.00 AUD

    “DO NOT USE!!!!!! this horrible excuse of a person is a scammer, does not complete projects, asks for an advance then ignores all your messages. AVOID. AVOID. AVOID!”

  • image de corvaal Write an iPhone and Android application $550.00 USD

    “I am pretty confident that this person is a scammer. He claimed he could not do it on time or on budget, we offer him more time and money, and he refused to answer until we stated we were ending the contract he then responded long enough to try to get us to pay him outside freelancer, when we refused, he went silent again. Also yaun is a guy that uses a girls photo. He is also a part of group from china, so be careful!”

  • image de Kodinia Write an iPhone application $250.00 AUD

    “The project is not completed according to the dispute”

  • image de Li S. Integrate FB login code on existing project $359.00 USD

    “Yuan was great wo work with, Understood thenproject and exactly what I needed I am already happy with the results. Thank you :)”

  • image de Mahmood A. I need house keeping service $842.00 USD


  • image de slime922 Codez une application iPhone €1500.00 EUR

    “Very good job ,fast and professional .I recommend yuan for his hard work.”


Photo & Video manipulation

Jul 2014 - May 2015 (10 months)

Implemented various filters and effects, that can be used on mobile app by users. Technology stack: GPUImage, OpenGL ES, Aviary, AVFoundation, AVSimpleEditoriOS Client platforms: iOS5+ Client devices: iPhone4, iPhone4S, iPhone5, iPhone5S, iPhone5C, iPhone6, iPhone6 plus Implemented filters & effects: Brightness, Color, BW, Sepia, Contrast, Blur, Lomo, Vintage, Cool, Mosaic

Edition29 HOUSED redevelopment

Apr 2014 - Jun 2014 (2 months)

I fixed two main bugs that needs to be fixed and secondly need to test the app completely and look for any other bug and make the app top notch without any bugs.


Expert for Agile system management

2009 - 2013 (4 years)


Agile software engineer (2013)


I received Certificate from UU IT company location based Jilin.


2011 ACM-ICPC World Finals

Have developed a lot of mobile project and submitted in app store.


  • US English Level 1


  • Connecté à Facebook
  • Freelance Préféré
  • Paiement vérifié
  • Téléphone Vérifié
  • Identité Vérifiée
  • E-mail vérifié

Mes meilleures compétences

Voir des freelances similaires