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, 127 json projects are completed every quarter on Upwork.

127

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 4.64.

4.64
Last updated: July 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

    $77.78 /hr
    599 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. Vasyl Popov

    Vasyl Popov

    iphone | android app developer

    Ukraine - Last active: 9 days ago - Tests: 6

    As a long-experienced developer on various mobile platforms I have created many notable mobile applications as well as websites. Native mobile jobs are my major fields in these 7+ years. Also engaged in hybrid mobile app and backend developments. - iOS & Android native mobile programming - Javascript / HTML5 / ASP.NET MVC / Parse.com / NodeJS / PHP / MySQL / MS SQL and other web and backend development - Hybrid mobile development using PhoneGap / Cordova - Social media integrations for Facebook, Twitter, Google+, LinkedIn, Instagram, Flickr and Vimeo - Integrate online payment solutions using Paypal SDK and Stripe - Cross-platform mobile games using cocos2d[-x] / Corona SDK Best quality on customer service is always my major goal. While collaborating with high-profile clients and developers from US, Canada and other European countries, I could communicate freely with my language skills and that also helped me to speed up all schedules for projects. And for now, I am quite sure that I have acquired the essential skills on both native and hybrid mobile works. Also have a firm conviction on such jobs.

    $39.99 /hr
    310 hours
    5.00
  4. Navin P.

    Navin P.

    PHP | ZF2 | Wordpress | Joomla | Opencart | CSS

    India - Last active: 6 days ago - Tests: 1 - Portfolio: 9

    I have been provide Web, Software and Mobile development firm with commitment for QUALITY WORK with use of latest technologies. Our ultimate Motive is CLIENT SATISFACTION. I have command on my skills that are always in search of challenging projects. If you have some thing like that ,Let me know.

    $17.00 /hr
    13 hours
    5.00
  5. Stefan Bowman

    Stefan Bowman

    PHP, web development and Multimedia

    Italy - Last active: 29 days 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
  6. Ferenc Knebl

    Ferenc Knebl

    Senior Mobile Developer for iOS and Android

    Hungary - Last active: 3 days 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
  7. Nahid D.

    Nahid D.

    Expert Web Developer

    Bangladesh - Last active: 2 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
    154 hours
    5.00
  8. Tomas Petru

    Tomas Petru

    Sr. Developer for iOS/Android/Web

    Czech Republic - Last active: 2 days ago - Tests: 11 - Portfolio: 3

    Developing applications for iPhone/Android was my favorite hobby, and now, after 5 years of intensive practice, it has become my professional business. Over this time I've developed a wide range of projects in iOS and Android , and gained a lot of experience in creating quality applications. Have a strong knowledge in C++ ,Objective-C and Java. Responsible, self-motivated, have ability to work in a team, within tight deadlines and under pressure. Always interested in learning new technologies and improving my programming skills. I'm working with great iOS designer, so if your project requires a graphics and constructing the UI, you may be interested in his services too. I have all needed equipment and devices for effective testing and debugging, such as iPhone 4S,5S,6 iPad 2, iPad 3, iPod Touch 5. <<<<<<<<<<< My Expertise >>>>>>>>>>> - iPhone/iPad Application Development - Android Application Development - Web Server Development - Graphic Design

    $50.00 /hr
    0 hours
    5.00
  9. Sebastien B.

    Sebastien B.

    Mapping solutions

    United States - Last active: 1 day ago - Tests: 1 - Portfolio: 10

    Based in Southern California, we are a trilingual team of Geographic Information System (GIS) and programming professionals dedicated to generating the most innovative cartographic and database solutions for our clients. In an era of ever-growing access and production of information, we understand the crucial importance of data mining and visualization. We are ready to support your business with all your mapping needs from standard PDF maps for prints to complex web-mapping options. Our portfolio includes clients from 4 continents and we continuously work in 3 languages: English, Spanish and French. Our Skype-based customer support and guarantees allows you to be in touch with us 10 hours a day and our daily reports on progress will keep you in the know about the latest advancements of your project. We are looking forward to hearing from you!

    $25.00 /hr
    8 hours
    4.97
  10. Albert P.

    Albert P.

    Expert iOS/Android Developer with Webservice experience

    Poland - Last active: 2 days ago - Tests: 6 - Portfolio: 8

    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.

    $38.89 /hr
    0 hours
    4.95