json Freelancers

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json Job Cost Overview

Typical total cost of Upwork json projects based on completed and fixed-price jobs.

Upwork json Jobs Completed Quarterly

On average, 126 json projects are completed every quarter on Upwork.

126

Time to Complete Upwork json Jobs

Time needed to complete a json project on Upwork.

Average json Freelancer Feedback Score

json Upwork freelancers typically receive a client rating of 4.65.

4.65
Last updated: May 1, 2015
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  1. Csaba Toth

    Csaba Toth

    Senior Mobile Developer for IOS8 (SWIFT) & Android, JSON API, Parse

    Hungary - Last active: 1 day ago - Tests: 9

    Hello *****Best Quality and Fast Speed******* I am a talented Mobile application developer. I have a good experience of Mobile application and games. Also, I have developed a lot of Desktop applications and web development. Mobile device platform: - iPhone 6 plus, iPhone 6, iPhone 5s, iPhone5, iPhone4s - iPad Air, iPad4, iPad3, iPad mini - Google Nexus 5, Samsung Galaxy S5, S4, S3, HTC One My skill-set: - Native: iOS, Android, Windows8 (Objective-C, Swift, Java, C#), JNI, NDK (C/C++) - Hybrid: PhoneGap, Xamarin, Titanium (HTML5, jQuery Mobile, C#) - Web service: XML/JSON, REST/SOAP - Cloud backend: Parse.com, Parse SDK, Parse REST, Parse Cloud Code, Amazon S3 EC2 AWS, Firebase, Twillio, Plivio - Chat & Messaging Engine: XMPP, Jabber, OpenFire, OpenTok WebRTC, Ejabberd, Erlang - Video/audio/image processing: OpenCV, GPU Image, CoreAudio, EZAudio, Pitch Control, Bass, AVFoundation - Video/audio streaming, codec: Wowza, Red5, H.323, MPEG-4 - VOIP, Cloud Communication: Twillio, Heroku, Tokbox - Speech recognition, text-to-speech, Siri, OpenEar - HTML5, PHP, ASP, JSP, C# and their frameworks - MySQL, SQLite, Oracle, SQL Server, ODBC - Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, Vimeo - Google Map, Foursquare, Geolocation, GPS, Open Street Maps - Cocos2D, OpenGL, Corona, Unity3D, Box2D - Game Center, In-App Purchase, RPG server - iAd, Adwirl, Revmob, Admob, Chartboost, Tapjoy, Flurry, Testflight - Cloud services: iCloud, Rackspace, Zoho CRM, Salesforce, Azure, AWS, EC2, Dropbox - Mobile Game Genre: Casino Slot machine, Flappy bird, Poker, Chess, RPG, Arcade

    Groups: Application Developers Alliance

    $44.44 /hr
    256 hours
    4.80
  2. David Mulder

    David Mulder

    Senior Engineer for Mobile APP(Iphone, iPad, Xcode for iOS &Android).

    Netherlands - Last active: 1 day ago - Tests: 10

    Hello, I'm David, highly experienced Mobile Engineer. I have 6+ years of rich experience in Mobile app&Web development. I have been working as a mobile developer since I graduated university. Although android and ios version and devices(iphone and ipad) are getting different every year, I'm the person who is eager to learn new tech so learnt new industry technology as soon as it was born and work professionally with git, Jira, trello, and bitbucket. I can start to work on your project right away and I can dedicate my full time on it to complete it asap. My profile at Linkdln: https://www.linkedin.com/in/davidmulder My works at apple store and google play store: https://www.dropbox.com/s/zipmcx7xa7e18es/MobileApps%28IOS_Android%29.pdf?dl=0 Thanks for your reading me fully.

    $55.56 /hr
    9 hours
    4.98
  3. Fabian Bigos

    Fabian Bigos

    Mobile & Web Developer

    Poland - Last active: 11 days ago - Tests: 10

    Hello I am working in Mobile and Web fields for several years. I have developed a various of kind of iOS/Android apps and web sites for clients and business company. So I have confidence about my work. From basic objective c, java, php to API, SDK, Library, I have enough experience and good solution in using and integrating for several purpose. - Programming language ; objective-c, swift , java, html5, css, js, jQuery Mobile, c# - Development tool & framework ; Xcode 6, Eclipse, Android studio, Xamarin, Titanium, PhoneGap/Cordova - Backend development; Web services and Cloud services such as Parse, Firebase, AWS,Dropbox - Source Control; BitBucket, GitHub, GitLab, JIRA, SVN - AD; AdMob, MoPub, RevMob - Apple Service and Google Service - Social Apis; Facebook, Twitter, Instagram, Youtube, Vimeo - Video/Audo/Image processing: OpenCV, GPU Image, Face Detection, Voice Recognition - Geolocation & Map; Mapkit, Google map SDk, Mapbox - Database; MySQL, SQLite, NSCoding, Core Data - Wireframe and Mockup 2.Web Area - Backend, Frontend development - UI design, Database design - JS, PHP frameworks I will do my best to give you a full satisfaction. Thank you

    $40.00 /hr
    24 hours
    5.00
  4. Johanne Hansen

    Johanne Hansen

    iOS & Social & XMPP Professional

    Norway - Last active: 7 days ago - Tests: 9

    " Quality Service within deadline " I've got more than 9 years in IT. I've learned professional education and have got plenty experience. Especially I'm an expert in iOS development, social platforms' api, XMPP and WebRTC. My key skills and abilities include + iOS programming languages (X-code, Swift, Objective-C) + iOS SDK (Foundation, UIKit, Core Data,AVFoundation, MoviePlayer,Quartz Core,Core Animation, etc) + Various social platform and their api including Facebook, instagram, twitter, etc. + Text messaging and video/voice chatting - XMPP, OpenTok, Pusher, APN + Networking framework - AFNetworking, Web RTC, Socket.io TCP/IP + Map integration(GPS Location) / Google Map API, MapKit Framework + e-Commerce payment system - Paypal, Authorize.net, Stripe, Saleforce, card.io + ad serving or ad network SDKs (iAds, Google admob, etc) + Web service develop and integrating - JSON RESTful API, Parse.com, Node.js, Ruby, Mean + Various library development using C/C++ + Team Work - SVN, GitHub, Bitbucket

    $50.00 /hr
    10 hours
    5.00
  5. Wolfgang Herrmann

    Wolfgang Herrmann

    Super Mobile App Developer

    Germany - Last active: 20 days ago - Tests: 4

    I pursue the Best Quality. I will do best for your satisfaction. I have 6+ years of experiences in mobile app programming that include almost 100 projects. My skills: iOS, Android, Windows app programming cocos2d, box2d, OpenGL, Corona, Unity 3D Game Center, In-app purchase, RPG Server Chartboost, Revmob, Upsight, Adcolony, Applovin, Admob, Vungle, Flurry, mopub, Tapjoy Facebook, Twitter, Instagram, Youtube MySQL, SQLite, Oracle, ODBC Parse.com, Amazon S3, Twillio Chat and Message Engine Video/audio/image processing Video/audio streaming

    $33.33 /hr
    20 hours
    5.00
  6. Vasyl Popov

    Vasyl Popov

    Mobile(iOS, Android) and Mac Developer

    Ukraine - Last active: 3 days ago - Tests: 6

    Over the last 5 years, I have strong experience in developing the iOS/Android and OS-X app/games as well as backend web service api. I also have deep knowledge and experiences in the following areas: SQL/SQLite databases, JSON libraries, Image Processing, Audio/Video Streaming, Social Network - Facebook, Twitter, Google API, Google Glass, and their integration with iOS applications. In the wide range of platforms, including iOS | iPhone | iPad, Android, I have developed 40+ apps/games available at Android Market and Apple Store. My Development Areas are as following ; ✔ iPhone, iPod, iPad, mac, Android, Web (iOS 6, 7, 8 and various os-x versions) ✔ objective-c, swift, java, c++, qt, cocoa, cocoa-touch, openGL ✔ Cocos2D, Box2D, Corona, PhoneGap, Sencha-touch, Unity3D. ✔ Social Media - Facebook, Twitter, Google+, Instagram ✔ Google Map Service, Apple Map Service, Foursquare, Geo Location ✔ CoreData, CoreGraphics, Animation ✔ Web Service, Ajax, XML, JSON, RSS, SOAP, WSDL ✔ PHP, MySQL, SQLite, HTML, HTML5, JavaScript ✔ Live Stream Video/Audio. Regards. Vasyl.

    $39.99 /hr
    310 hours
    5.00
  7. Andreas Braun

    Andreas Braun

    Frontend | Ruby on Rails | WordPress | MVC Expert

    Germany - Last active: 4 days ago - Tests: 10

    Hi, I am a senior web developer with 6+ years experience. I have developed a wide range of websites. I am always trying to deliver high quality solutions before deadline. I have strong skills and good experience in the following areas. - Ruby - Ruby on Rails Refinery CMS, Spree RSpec,Cucumber,TDD,BDD Various Ruby Gems, - PHP ( OOP ) MVC : CodeIgniter, Zend, Laravel CMS : WordPress ( Theme development & customization, Plugin modification ) - Front-End: HTML/CSS, JavaScript, Ajax, Coffeescript, JS Framework: AngularJS, D3JS, NodeJS, HAML, - Database: SQLite, MySQL, PostgreSQL, MongoDB I am looking forward to work with you!! Thanks for your time and consideration.

    $40.00 /hr
    16 hours
    5.00
  8. Bentea Lucian

    Bentea Lucian

    Senior Mobile developer

    Norway - Last active: 3 days ago - Tests: 5

    Hi I am a strong mobile developer who has many experience for 6+ years. Over last 6 years, I have developed many apps and games for iOS/Android. I have experience in following area: 1) Mobile App development - iPhone, iPad, Android UI design (iOS 7, iOS 8 AutoLayout) - Social Integration like Facebook, Twitter, Instagram, Pinterest - Google Map service, Geo Location - Parse framework - JSON, PHP, SQLite, CoreData - Photo/Video Editing and Sharing - Video Live Stream - Testflight 2) Mobile Game development - cocos2d, cocos2d-x, box2d, corona, Unity3D - In-App, Game Center, Leaderboard - Chartboost, Revmob, Admob, Mopub, iAd, App Lovin I am sure I can finish your project successfully. I will provide you high quality products within deadline. Let's work with us. Thank you for visiting my profile. Bentea L.

    $55.56 /hr
    385 hours
    4.97
  9. Amit Kumar

    Amit Kumar

    ASP.NET and MVC Software Engineer

    India - Last active: 1 day ago

    Over the last 4+ years, I have developed a wide range of websites using HTML, .NET /mvc, using sql server 2008/2012 in C# ,VB and PHP using my-sql including sites for startup companies and small businesses. My core competency lies in complete end-management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. I also have great experience in the following areas: - Javascript/ Jquery/ Ajax & jQuery, jQuery UI - HTML/ XHTML/ CSS - JSON/ XML - MS SQL server 2005, 2008,2012 - Visual Studio 2.0/ 3.0/ 3.5/ 4.0/5.0 – ASP.NET/ VB/ C# - .MVC 2.0/ 3.0/ 4.0/5.0 Razor - Web services, LINQ - Entity Framework - APIs (Twitter, Facebook, Google+, Instagram, LinkedIn,Long Tail) - Core PHP - My SQL Server -Kendo UI -Telerik .NET UI Controls -SVN/TFS

    $11.00 /hr
    24 hours
    5.00
  10. Martin D.

    Martin D.

    Fullstack Mobile(Android/iOS) App Developer with Web experience

    Bulgaria - Last active: 1 day ago - Tests: 8

    I am a fullstack mobile app developer with 8+ years' experience, who is building a world-class iOS and Android apps as well as web/desktop apps. My main tool is Apple XCode. And Objective-C is my most favorite programming language. It can produce a real magic in right hands. Excellent at developing and maintaining API related app (Restful JSON) using GIT/SVN and task trackers. Social networking development (Facebook APIs), Google Maps APIs, statistics APIs, custom server APIs is not an issue at all. I am hardworking and a fast learner with good communication skills and a strong design background. Also, I have an excellent general sense of what a product should and shouldn't do. Look forward to working with you!

    $40.00 /hr
    29 hours
    5.00