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: June 1, 2015
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  1. David B.

    David B.

    Senior Mobile App (iOS/Android) & Server Back-end Developer

    Netherlands - Last active: 2 days ago - Tests: 17 - Portfolio: 16

    *** Your Journey into Native Mobile App Development (iOS/Android) starts with me *** Full-Stack Native Mobile Apps & Web Services Expert Full Time support(40~60 hrs/week), Daily progress report & Skype live chat Long-term relationship contract & Money-back guarantee *** iOS/Android Application Development *** - iOS Native (XCode): Objective-C, Swift, Cocoa Touch, iOS7 & iOS8 Kitkat - Android Native (Studio/Eclipse): Java - Hybrid Apps: Phonegap by Ionic (Angular JS), Cordova SDKs, JQM, Kendo UI - Xamarin (.NET) - Mobile Games: Cocos2D, Cocos2DX, Unity3D, Board SDK *** Mobile Application Services Support *** - Analytics and Testing : Google Analytics, Apptentive, Flurry, KIF testing framework - Back-End: JSON-RESTful APIs built on PHP MVC Frameworks for CRUD as well as 3rd Party SDK integration like Parse, Twillio - Services: Cloud, iBeacon, FB, Twitter, LinkedIn, Twitter, Google, Audio/Video (Wowza) Streaming *** Web Services Support *** - Main Tools: PHP, MYSQL, HTML5, DHTML, JQuery, CSS3 (Bootstrap & Responsive & Parallax) - JS Templates: AngularJS(Ionic), BackboneJS, NodeJS(XMPP), RequireJS - Common Templates: WP, Joomla and PHP MVC frameworks : CodeIgniter, Laravel, CakePHP, Yii and Kohana - Ecommerce: Magento, OpenCart, WooCommerce, Shopify and Prestashop I work as individual, supporting full time. I'm here to analyze your ideas and requirements and offer our vision of project realization. Rough quote will be ready within 48h. If it is acceptable for you, I'll prepare detailed project development plan indicating timeline and budget. I always make sure to bring you upon successive results of highly and creatively qualified results before your deadline and guarantees refunding for any unsuccessful results or issues which are responsible for me. I am seeking an opportunity to become a business partner with long-term relationship forever.

    Groups: Application Developers Alliance

    $70.00 /hr
    491 hours
    5.00
  2. Cristian c. H.

    C# .Net Programmer with experience in MVC,Web-API,AngularJS,Bootstrap

    Romania - Last active: 07/24/2013 - Tests: 1 - Portfolio: 1

    I've been working in the IT development for the past 5 years. Over the last 2 years am working with C# and .Net technologies using MVC and Web-API frameworks for different sites and applications. On the database side I'm using for all projects either Microsoft SQL Server either MongoDB or MySQL. On the client side I have good experience with HTML5, Javascript, AngularJS and Bootstrap (2.x and 3.x). I also have some experience with WPF, w or w/o MVVM framework.

    $37.00 /hr
    46 hours
    4.87
  3. Nahid D.

    Nahid D.

    Expert Web Developer

    Bangladesh - Last active: 4 days ago - Portfolio: 15

    If you would like quality work with a fair price, contact me. You won't be disappointed. I am a professional Web Developer. Over the last 5 years, I have developed so many websites using PHP, MySQL, Joomla, WordPress. Jquery, HTML, CSS. I enjoy working on all kinds of Web Development projects.

    $10.00 /hr
    119 hours
    5.00
  4. Ferenc Knebl

    Ferenc Knebl

    Senior Mobile Developer for iOS and Android

    Hungary - Last active: 1 day ago - Tests: 9 - Portfolio: 10

    When I am really happy? I love to hear: "You are doing a great job!" Over the last 10 years, I have been working in IT fields. I got very systematical knowledge and skills of producing software products throughout the analysis of requirements, system design, database schema design, construction of code, deploying and testing. Since 2010 I have started the iOS programming and become very familiar about its development. I am able to work for Android mobile app development as well. So now I am very confident to work with potential clients with various mobile app specifications. I will do the best of my abilities and knowledge to build the apps for them. I love to skate where the puck is going to be, not where it has been. Followings are my major skill sets: ✇ Mobile app & game development ➢ PhoneGap : Cordova, Ionic, Jquery Mobile & Angular Mobile UI ➢ Social Networking, Entertainment, Lifestyle, Education, Business Apps ➢ Google Map, Foursquare, Geolocation, GPS, Open Street Maps ➢ Parse.com, JSONKit, RESTKit, TestFlight, AFNetworking ➢ ApplePay, Stripe, Authorize.Net, Paypal, SagePay,WePAY ➢ XMPP, QuickBox, VSee, OpenTok, Skype, WebRTC ➢ Cocos-2D, Box2D, 2D-x, Unity 3D, Admob, Revmob, Chartboost, Flurry ➢ Push notification(iPhone/Android), Local Notification on Mobile app
 ➢ Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, Vimeo ➢ Barcode, QR scanner (iPhone/Android)
 ✇ Web Development ➢ CarrierWave, Kaminari, HAML, SASS, Jammit ➢ Laravel, Symfony2, CodeIgniter, Yii, Zend ➢ Parse.com, Windows Azure, Amazon Web services, Heroku ➢ BackboneJS, AngularJS, EmberJS Best Regards. Ferenc.

    $40.00 /hr
    47 hours
    5.00
  5. Ulrik Damm

    Ulrik Damm

    Solid iPhone/iPad/iWatch/iMac App Expert

    Denmark - Last active: 30 days ago - Tests: 4 - Portfolio: 2

    I have rich experience in the development of iOS and android. If you are looking for a highly skilled iOS & Android development expert with depth of knowledge, professional attitude, excellent communication and the highest code quality, I am right person you are looking for. http://ufd.dk http://robo.cat On the development side of things, I am fastidious and passionate. All of my work is delivered ahead of scheduled and is crafted with the utmost quality. If you work with me you can get excellent results for short time. I will satisfy your need with my skill. I love working with you.

    $38.89 /hr
    40 hours
    5.00
  6. Zhang Tao

    Zhang Tao

    Senior IOS7/8 & Android Social Networking App developer

    Hong Kong - Last active: 5 days ago - Tests: 7 - Portfolio: 9

    ********* HONESTY + HIGH-QUALITY + FAST SPEED ********* I am a hardworking, results-driven, highly proficient IT professional with 6 years experience and a real passion for mobile application development. Readily embracing cutting-edge technology, I have gained an in-depth understanding of the main mobile platforms and recognize the subtle differences between each. Having helped develop a series of commercially successful apps on iOS, Android and Windows Mobile, I am seeking a new opportunity that will allow me to further expand on these skills. SOFTWARE SKILLS Experience with: 1) Development Platform: - MacOSX 10.8.2+ / XCode4.6+ / iOS5+ - Android SDK 2.2+ - Xamarin 2) Main Skills: - Chatting, Dating - Image Coloring, Captioning, Filtering, Camera & Gallery - OpenCV, OCR, Image Processing - Communication with backend-web server with JSON, XML - Apple Map, Google Map, GPS, Augmented Reality - Parse.com, UrbanAirship, QuickBlox, OpenTok, Twillio - QuartzCore, CoreData, OpenGL ES - Sqlite, Mysql - cocos 2d, ccos 2d-x, Mysql 3) Accessories - Game Center, In-App Purchase, Push notification - Social integrating with Facebook, Twitter, Google+, Youtube, Instagram - iAd, Adwirl, Admob, Revmob, Chartboost, TapJoy, Cerebro - Github, JIRA, bitbucket , Testflight, Dropbox - Bug sense, ACRA Thank you for your reading. Zhang

    $33.33 /hr
    25 hours
    5.00
  7. Stefan Bowman

    Stefan Bowman

    PHP, web development and Multimedia

    Italy - Last active: 1 day ago - Tests: 5 - Portfolio: 10

    Since 1989 I have been an informatic teacher, qualified lecturer and freelance consultant for many school institutes and enterprises in Milan, Lodi and their surroundings, taking care of such issues as server side software programming, security and installation of Linux & SUN Solaris web and intranet servers. I’ve been Technical Product Manager in Digivision srl, Multimedia and software development lecturer for “CFP Canossa di Lodi” and SAE institute in Milan, recently I have been taking care of Value Added Services security and software development. Good English, French and Italian , written and spoken. I have a in depth knowledge of web sites and multimedia products authoring and programming, being also product manager for Digivision Srl about various audio and video digital compression technologies. I am an Internet software developer producing dynamic and interactive Web pages, search engines, e-commerce sites and web applications on UNIX, LINUX and Microsoft NT server, using PHP, ZEND FRAMEWORK, Mysql, Oracle, XML, JSON, Flash ActionScript, Director Lingo and others. Good level of APACHE, PHP, MYSQL, FTPD, SAMBA, NESSUS, TRIPWIRE, IPTABLES configuration and installation, set up of apache based reverse proxy in mod security for Linux and Solaris8

    $35.00 /hr
    432 hours
    5.00
  8. Anton B.

    Anton B.

    Expert iOS(Swift) & Android Developer

    Bulgaria - Last active: 1 day ago - Tests: 8 - Portfolio: 5

    I have been involved in mobile application and games for more than 5 years. So far, I have implemented Photo/Video Sharing, Video/Text Chatting, Google Map/GPS Tracking, Push notification, Audio/Video Processing, REST and SOAP API, XML and JSON processing and many other features on ios/android. I have developed all project using ios/android native or Marmalade (Cross platform). I can add in-App purchase and Ads to your app and connect it with Social network(FaceBook, Twitter). I have a strong skill of graphic design with high quality and I use a Git, GitHub and BitBucket in order to commit the source code.

    $27.78 /hr
    810 hours
    4.92
  9. Vasyl Popov

    Vasyl Popov

    Mobile(iOS, Android) and Mac Developer

    Ukraine - Last active: 7 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
  10. Albert P.

    Albert P.

    Expert iOS&Android&Web Backend Developer

    Poland - Last active: 6 days ago - Tests: 5 - Portfolio: 5

    Hi, Everyone. I am an expert Mobile App developer as well as Web Backend Developer. I have been working for the past 6+ years developing iOS(iPhone/iPad) apps and Android apps, including programming and graphic design. I love doing quality work and I am so easy to work with. I can get a lot done in a short time and I 'd welcome the chance to complete a high quality project for you. My Skills include as followings; * Social Media/Networking/Sharing App, * Google Map, GPS Location App * MMS, SMS, Push Notification App, * Hotel/Restaurant Booking App, * Barcode/QR Code Scanning App, * Quiz, Running, Endless, Puzzle, Fight Game etc. If you work with me, I make the promise as followings; * Daily or Weekly result. * Responsible communication for more than 10 hours each day. * 100% money back guarantee if not satisfied for any reason. Contact me and then you never regret! Let's do a good business together! Best regards, Albert P.

    $35.00 /hr
    0 hours
    4.85