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: 16 hours 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
    265 hours
    4.80
  2. Vitaly Sas

    Vitaly Sas

    Expert Android developer

    Belarus - Last active: 2 days ago - Tests: 3 - Portfolio: 2

    I specialize in developing Android apps and have over 4 years of experience in commercial app development. I'm looking for a interesting projects to do a really good job. Challenge me and I'll do my best to create high-quality app in order to meet your wishes. I look forward to working with you. Thank you for reviewing my oDesk resume. Best regards, Vitaly Sas.

    $33.33 /hr
    1,347 hours
    4.90
  3. Viktor Naryshkin

    Viktor Naryshkin

    Windows Phone expert

    Ukraine - Last active: 16 hours ago - Tests: 3

    Tons of successfully developed Windows Phone projects. I'm TOP-rated Windows Phone expert on stackoverflow (http://stackoverflow.com/users/820813/ku6opr) and I'm open for new projects I'm degreed in Computer Science and have 5 years of background in C#., NET , Silverlight, WPF (oDesk verified). I'm interested in Windows Phone, Windows Phone Universal apps that target Windows and Windows Phone and Windows 8 projects If you need a skillful mobile developer, I will be glad to work with you. I'm provide safe outsourcing services, secure processes, and top quality results for your business. Technologies: Windows Phone 8 / 8.1 Windows Store / Windows Phone 8.1 Universal app Windows Store Strongest skills: A deep familiarity with C# and XAML Experience working with push notifications, live tiles and Windows Phone SDKs Experience with third-party libraries and APIs Solid understanding of the full mobile development life cycle

    $33.00 /hr
    462 hours
    4.98
  4. Aleksandr Kondrik

    Aleksandr Kondrik

    Senior iOS Developer

    Russia - Last active: 16 hours ago - Tests: 5 - Portfolio: 5

    Hello, With 3+ year of experience in I get expertise in iOS and .Net development. I love develop apps. I like complex and diverse assignments that keep my mind sharp and allow me to constantly learn new things. Have some apps in AppStore: 1) iDrom - mobile client for site www.drom.ru 2) Autoservice 717 - business application for car service

    $33.33 /hr
    229 hours
    5.00
  5. Bence Dragsits

    Bence Dragsits

    Senior Magento Certified Developer Plus

    Hungary - Last active: 16 hours ago - Tests: 9

    Senior Magento Certified Developer Plus ( http://www.magentocommerce.com/certification/directory/dev/75109/ ) 6 yrs of experience in building high quality Magento sites. I am a very experienced and enthusiastic Senior Magento Developer, having worked on a variety of Magento websites and e-commerce solutions over the last 6 years. I mostly spend my time with Magento including both magics of back and front ends using PHP, Javascript, CSS and XML. My Magento experiences include developing Extensions and themes, customizing design templates, version upgrading, multi sites and domains, SEO, etc. And I am a full time freelancer, and willing to work half a day. Looking forward to building long term relationships with clients, and I am flexible with my working hours according to clients' need. Skill Range - Magento Community Edition; 1.3.x, 1.4.x, 1.5.x, 1.6.x, 1.7.x, 1.8.x, 1.9.x, - Magento Enterprise Edition; 1.8.x, 1.10.x, 1.12.x, 1.13.x, 1.14.x - FrontEnd; HTML5, CSS3, jQuery, aJax, XML, JSON - BackEnd; PHP / MySQL, MVC, XML, Zend, SOAP / RPC, Database Structuring(EAV) - Responsive; Bootstrap, Foundation, Grid, Skeleton, YAML, etc - Version Control; BitBucket, GitHub, GitLab, Git, SVN - Other; Adobe Photoshop

    $33.33 /hr
    558 hours
    4.99
  6. Jaskiran K.

    Jaskiran K. Agency Contractor

    iOS (iPhone/iPad) expert in Swift / Parse /JSON / XML / API / Android

    India - Last active: 16 hours ago - Tests: 4 - Portfolio: 6

    Absolutely dedicated to creating top notch mobile applications for my clients, I am a skilled programmer with 4 years of development experience in developing iphone and Android Mobile applications. I love develop apps. I like complex and diverse assignments that keep my mind sharp and allow me to constantly learn new things. _____________________My Technical Skills Swift , Objective-C 2.0 , IPhone iOS-2.X/3.X/4, IDE - XCode-3.X , Interface Builder-3.X, Instruments. _____________________I specialize in : - iOS7.0, 8.0, Android - Objective-C, Swift, Autolayout - PHP, Javascript, CSS3, Json, XML - SQL, Coredata - Xcode(5.1.1, Xcode6.1), SDK FrameWork - Custom API (FaceBook SDK,, Twitter API, ,Instagram API, phpfox API, parse API, FireBase, Foursquare , Amazon S3) ____________________Backend skills - Strong command on versioning control system like Git, branching, tags etc. - Java EE - Strong OOP concepts. - Design Patterns. - Database architecture and management. - Google Cloud Platform - App Engine - Objectify library. - Creating and managing RESTful API using App Engine. - Writing clean and readable code with comments. - Working with other team members. - Issue tracking systems like JIRA, Trello. - Image and Videos caching, manipulation, pagination and optimization. - Strong knowledge of push notification technologies.

    Associated with: CS Soft Solutions Pvt. Ltd.

    $18.00 /hr
    1,180 hours
    4.69
  7. Fatih O.

    Fatih O.

    iOS Developer

    United States - Last active: 4 days ago - Tests: 4

    I graduated from Pace University with a Bachelors of Science degree in Computer Science. I have had a great internship right after graduating, where I improved my iOS app development skills. I am currently a self-employed iOS developer residing in New York. I have over 3 years of experience in iOS development. For over 3 years, I have helped individuals and companies with developing iOS apps and consulted them with mobile app solutions. I am very confident working with XCode, Objective-C and my skill sets also include developing back-ends for iOS apps with Parse and PHP. I believe in creating top quality apps with professional and friendly service. I will be more than happy to assist you with your project. More at http://fatih-ozkul.com

    $50.00 /hr
    378 hours
    5.00
  8. Mahesh J.

    Mahesh J.

    Web Developer/ WebDesigner

    India - Last active: 16 hours ago - Tests: 14 - Portfolio: 3

    I have 3.5 years of Experience in Software Development. I have strong Software development skills with experience in Web Application and Web Development in N-tier Client-Server based Internet technology, intranet portal design/development; Web based data reporting system, workflows, Framework development for Internet application. My experience has stretched across various programming languages including C#, ASP.NET, Ajax and Jquery. I am also well versed in RDBMS concepts. My skill sets include the following: Web Design Skills - HTML - CSS - Bootstrap - Psd To Html - Adobe photo shop cs3 Development Skills & Technologies - ASP.NET - MVC 3 - 4 - 5 - C# - AJAX - Web Service - JavaScript - J query - XML - Angular js - WebApi - Json Database Expertise - SQL Server 2005-2008 - LINQ - Entity Framework Deployment, Troubleshooting at Client server, Data Migration, Fix issues at Client end. Proficient in Web Designing, Web Portals, Web Applications, Parallel Programming

    $5.56 /hr
    657 hours
    5.00
  9. Roman Valeev

    $40.00 /hr
    6,837 hours
    4.90
  10. ChengRi Jin

    ChengRi Jin

    Mobile Programmer

    China - Last active: 1 day ago - Tests: 3

    Hi. How are you? I am mobile application expert. I have been working for the past 5 years developing mobile apps, including programming, graphic design and backend development (php, MySQL). My Skills include - Objective-C, Swift, C, C++, PHP, Java - iOS 8, iOS 7, Health kit, Watch kit, Apple Pay - Google Map, GPS location, Core Location / GPS, GeoLocation API / Places API - Push Notification, Local Notification, Events. - CoreData, CoreGraphics, Animation, Audio/Video streaming. - Barcode, QR code. - Web Server Management (Amazon S3, Godaddy, Peer to Peer) - Parse API, Dropbox API, iCloud - Bluetooth LE, NFC(Android), iBeacon(iOS). - Facebook, Twitter, Youtube, Flicker, Instagram - Video, Camera, Image processing, Video/Audio Streaming - Reversing technology of pc and mobile applications. I love Apps and Games for iOS and Android! 'Best service to client' . this is my business rule. Thanks

    $33.33 /hr
    168 hours
    5.00