json Freelancers

Browse json job posts for project examples or post your job on Upwork for free!

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
More options
Clear all filters
  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
    270 hours
    4.80
  2. Vitaly Sas

    Vitaly Sas

    Expert Android developer

    Belarus - Last active: 3 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: 1 day 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. Bruno Marek

    Bruno Marek

    Senior Mobile(iOS&Android) Developer with Best Web experience

    Czech Republic - Last active: 5 days ago - Tests: 11

    I've been a senior mobile app developer in the mobile space for 7 years with a proven track record of completing projects on time and exceeding client expectations. During this course, I was responsible for bringing several high profile apps and Web site on the market. I'm here to bring your ideas and vision to mobile, web market with success and I have lots of experiences in software building from scratch. I also have some experience in the following areas; 1) Mobile (iOS/Android) - Social network application ( Chat, Dating, Instagram, Facebook, Twitter integration ) - Push Notification( APNS, GCM ) - Google Map, Geo-location, Barcode/QR Code scan - Business application - Backend web service, REST API+ 2) Web - Javascript, jQuery, KendoUI, DHTMLX, Html5 - CMS: Wordpress, Joomla - eCommerce: Magento, Shopify, PrestaShop - MVC: Codeigniter, CakePHP, Laravel, Zend - CVS: Git, SVN I am always trying to give the good quality and high speed to my clients. Do you want to save your money and time? Contact me. I can give the best result to you. Don't hesitate to get in touch if you have questions!!! Regards, Bruno

    Groups: Pro Web Designers

    $37.00 /hr
    92 hours
    5.00
  5. Peter R.

    Peter R.

    Senior iOS Developer

    Romania - Last active: 1 day ago - Tests: 7

    Thank you for viewing my profile! I am a professional iOS developer with over 5 years experience in this field, but worked with other technologies as well in the last decade. Since developing apps for the iPhone and iPad I had the pleasure of both working in a large company, but also as a successful freelancer on small and medium size projects. I am new to oDesk, so far I have been working on other freelancer websites. You can see some reviews of my previous work on the following link: https://www.elance.com/s/p_r_861027/job-history/?t=1. My portfolio lists only a handful of apps I've had the chance to work on. I'm looking for clients that are seeking experience and quality in iOS development. I took 2nd place in the iOS Programming Test. Looking forward to working with you!

    $35.00 /hr
    32 hours
    5.00
  6. Bence Dragsits

    Bence Dragsits

    Senior Magento Certified Developer Plus

    Hungary - Last active: 1 day 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
    566 hours
    4.99
  7. Aleksandr Kondrik

    Aleksandr Kondrik

    Senior iOS Developer

    Russia - Last active: 1 day 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
    230 hours
    5.00
  8. Anton Myagotin

    Anton Myagotin

    Scientific programming

    Russia - Last active: 21 days ago

    Anton Myagotin was born on 27 September 1979 in Khabarovsk (Russia). He received the Dipl. Ing. degree in electrical engineer-ing in 2002 from the Khabarovsk State Technical University (Russia). He received the master degree in computer science in 2003 from the Saarbrücken University (Germany). From 2003 to 2006, he was a PhD student at Saarbrücken University (Germany). From 2006 to 2008, he was a lecturer in the Russian-German Institute of Computer Science at the Pacific State University (Russia). He received the PhD degree in the field of informational, measuring and control systems in 2011 from Institute of Mechanical Engineering Problems (Russian Academy of Science). Now, he is a dean of foreign student educational programs at the Saint-Petersburg State University of Civil Aviation. His research interests include signal and image processing, foam physics and parallel reconstruction algorithms.

    $38.00 /hr
    1 hours
    4.98
  9. David Mulder

    David Mulder

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

    Netherlands - Last active: 3 days 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
  10. Cristian c. H.

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

    Romania - Last active: 07/24/2013 - Tests: 1 - Portfolio: 7

    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