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On average, 118 json projects are completed every quarter on Upwork.


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json Upwork freelancers typically receive a client rating of 4.65.

Last updated: July 1, 2015
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  1. Martin G.

    Martin G.

    Certified Top 10 Magento/Netsuite Guru

    Argentina - Last active: 3 days ago - Tests: 7 - Portfolio: 1

    Hello Everyone, My name is Martin Gonzalez and I am from Argentina, I am a certified magento developer and Top 10% magento/netsuite Guru on Upwork. Over the last 5 years, I have developed a wide range of websites using Magento, HTML5/CSS, Javascript/jQuery, DHTML, PHP, and MySQL including sites for startup companies and small businesses. -- Skill Set -- Special Skillful at Magento CMS platform - Magento; 1.6.x, 1.7.x, 1.8.x, 1.9.x(community edition) - FrontEnd Skills; Javascript, jQuery, AJAX, JSON, responsive HTML / CSS(2/3) - BackEnd Skills; Zend-Framework, PHP / MySQL - Subversion Tool; Git, Tortoise SVN, WinCVS, VSS - Web Server; APACHE, Tomcat, nginx - Design Tool; Photoshop, Firework, Illustrator So I am a Magento Developer, Magento Expert, Magento Theme Designer, Magento Extension Developer, Magento FrontEnd Themer, Magento Backend Expert, PSD To Magento Converter, PSD To Magento Themer, Magento Developing Senior Expert, Senior Magento Developer, High Skilled Magento Developer. I’m creative on any stage of the web-development. Creativity, pinch of irony and possibility to watch the results of my work being used by other people and being helpful, inspire me. I will serve for you and your project on the full time. :)

    $40.00 /hr
    0 hours
  2. Yoshiro T.

    Yoshiro T.

    Mobile & Web Developer

    Japan - Last active: 16 days ago - Tests: 4 - Portfolio: 1

    Since 2009, I've developed dynamic websites and mobile applications for ios and android. Have developed a lots of mobile apps of following categories. - Social networking : Like & share, Dating service, Events management, Messaging services. - Finance & Business : Budget management, Currency converter, Stock chart. - Health & Fitness : Fitness training, Running, WeightLoss. - Photo & Video : Instagr-jam, Photo-booth style, Frame & Caption. - Streaming & VoIP : Softphone(Linphone, XLite, CSipSimple), Video Steaming(FMS, Wouza, Live555, VLS/VLC, FFMpeg) - Delivering top quality with professional service. - Devoting my full time. I've skills in the following area : objective-c, xcode, cocoa, cocos-2d, storyboard, core-java, javasscript, swift, NDK, eclipse, ios-development, android-app-development, mobile-crossplatform-development, xml/json, facebook, twitter, instagram, icloud. If you believe that I would be a good fit for your project, feel free to contact me! I will be more than happy to assist you and see how I could help you with your project.

    $20.00 /hr
    0 hours
  3. John Smith

    John Smith

    Mobile+Video+Web+Cryptography Expert

    United States - Last active: 25 days ago - Tests: 4 - Portfolio: 3

    !~~~~ Maximum satisfaction to customers ~~~~! I am an expert of mobile, web, video and cryptography with more than 7+ years of professional experience . I developed many useful android & ios apps, especially social networking, video editing, video streaming, video chatting, games, location apps, etc. I have rich experiences to use ffmpeg to import many videos, audios, photos, cameras and export videos of several formats. I am developing the websites using HTML5/CSS3, PHP5, C# and MySQL, MSSQL, jQuery etc. I have rich experiences to build commercial websites with Paypal gateway. I am a cryptography and network security expert and have rich experience of designing and using symmetric & asymmetric cipher system and various security systems. If you hire me, I will satisfy you with good speed and high performance. My Mobile Devices: - Samsung Galaxy S4 - Google Nexus 7, Nexus 5 - iPhone4, 5s, iPad mini, iPhone 6+ - LG G2 F320S - Samsung GalaxyTab Pro 320 - Sony Xperia M35c My Skills: - iOS(Objective-C, Swift), Android (Java), NDK (C/C++) - PhoneGap, Xamarin - Cloud:, Amazon S3 EC2 AWS, Twilio - Media Streaming: Wowza, Red5, FMS - Video/audio/image processing: FFmpeg, Image Magick, AVFoundation, OpenGL ES, OpenCV - Facebook, Twitter, Linkedin, Instagram, Youtube, Tumblr, Pinterest, Line, WhatsApp - Chat & Messaging Engine: OpenFire, WebRTC, XMPP - Payment Gateway: PayPal, Stripe - Google Map, GPS, Open Street Maps, GCM Thank you for regards.

    $35.00 /hr
    0 hours
  4. Lexandra Yaneva

    Lexandra Yaneva

    Android Developer

    Russia - Last active: 29 days ago - Tests: 5 - Portfolio: 1

    I have: Extensive and hands-on experience with Android SDK, development tools, application lifecycle, asynchronous server communication, and UI components Knowledge of object oriented methodologies and alghoritms Experience with some frameworks and tools Good understanding of multi threading Able to work in a fast paced and structured position yet adapt to a flexible and team-oriented environment. Previously worked with Web (over 2 years) and Java. Also, i will be happy to support any initiative. Сurrently working with Material Design for L

    $5.00 /hr
    0 hours
  5. Maneesh Sahu

    Maneesh Sahu

    Software Developer

    India - Last active: 20 days ago

    • Over 8 years of experience implementing web content management solutions specializing in Interwoven’s TeamSite suite of products. Worked extensively on Templating (FormsPublisher), SitePublisher, Workflows, OpenDeploy, DataDeploy and MediaBin. • Experienced in both development as well as administration of Interwoven TeamSite environments. • In-depth knowledge of Perl, XML, XSLT, HTML, CSS, and JavaScript. • Experienced in finalizing the templates for static and dynamic websites and developing the templates in TeamSite. Extensively used in-line callouts, CGI callouts and FormAPI. • Experienced in design and development of workflows including the implementation of solution workflows and emails. • Experienced in developing Perl programs for custom user functionality in TeamSite. • Experienced in web development using Java, JSP, Servlets and JDBC. • Provided implementation documentation and user documentation. • Driving projects from Design phase to Deployment phase and taking ownership of Content Management issues.

    $9.00 /hr
    0 hours
  6. Siddharth Paul

    Siddharth Paul

    Senior Software Developer

    India - Last active: 1 month ago

    Performance-driven Senior Software Engineer (SCJP Certified), having sounding experience in design, development, testing and implementation of web-based applications supporting worldwide users. A technocrat as an individual and an outstanding team member consistently delivering projects on or before time and thriving in challenging & rapid learning environments. Self-starter with ability to excel under minimal directions. Excels in collaborative as well as leadership roles.Exceptional attention to detail, speed and accuracy. Communicated effectively from onsite professionals to boardroom with excellent presentation skills. Embraces a ”continuous improvement” approach throughout daily tasks. • Self starter under minimal guidance, • Creative problem solving, • High attention to details, • Analytical & Organised, • Speed and accuracy, • Strong written & oral communications In-depth experience in developing highly integrated web application in J2EE. Direct experience in Spring, Hibernate,REST API, Webservices, Interwoven Teamsite which includes developing logics using Form Publisher, FormAPI, Workflow Modeler. Interested in challenging projects with untold complexity helping me to become more informative.

    $10.00 /hr
    0 hours
  7. Paul Jur

    Paul Jur

    Senior iOS Developer

    Lithuania - Last active: 1 day ago - Tests: 4 - Portfolio: 3

    Hi I have many experience of mobile app development more than 5 years. The following is my skills. - Languages JavaScript, Python, CSS 3, Objective-C, C#, HTML5, C++, SQL, Ruby, VB.NET, Java - Frameworks Flask, Ext JS, iOS SDK, Colony Framework, Django, Ruby on Rails, Android SDK - Libraries/APIs jQuery, SQLite, Parse iOS SDK, OpenGL ES, Parse Android SDK - Tools Git, Xcode, SVN, Eclipse, Android Studio - Paradigms Agile software development, Scrum - Platforms Amazon Web Services, iOS, Linux, Heroku, Mac OS X, Windows, BSD, Android, Parse - Storage PostgreSQL, MySQL, MongoDB, Memcached, SQL Server, Oracle - Misc Pagoda Box, Quorum I hope that many clients work with me gladly and without failure of their job. Thank you

    $50.00 /hr
    0 hours
  8. Andrew A Buteau

    Andrew A Buteau

    Brilliant iOS/Android App developer

    Sweden - Last active: 10 days ago - Tests: 2 - Portfolio: 3

    Hello, Everybody. Thanks for looking my profile. I am highly-talented an iOS/Android developer. In university I mastered concrete Mathematics and 3 programming languages such as Java C/C++, C# so that I have ever took in part in programming challenge. As complete course I have a first chance to develop android application. After graduate I was very interested by Objective-C and so that I can easily become an iOS&Android developer. I have been working for 5+ years developing iOS/Android mobile apps. I have excellent skills in Objective-C, Swift, Java, C/C++/C#, Unity3D, Eclipse IDE, XCode IDE, Cocos2d/Cocos2d-x, Box2D, Corona SDK, Xamarin and OpenGL. I also can design graphic for mobile apps&games as I have a good designer. He is working with me over 2 years and I like all graphics built by him. My Service includes: -/\- * Correctness of project requirement analysis and Document specification. * Design for development as well as quickly. * Well formed programming( easily upgrade and fix with mark code description), * Cooperation with other partner. * Integration any SDK and any API Service range: - Android/iOS Device control - Video/Audio Streaming - Photo Filtering and Editing - Cocos2d/Cocos2d-x, Box2D - Unity3D - Ads such as chartboost, admob and in app purchase/billing - Facebook, Twitter, Instagram - Google Map, GPS location - Push and local notification, Calendar, Alarm - Core graphics, Core image, OpenCV, OpenGL, Animation - Barcode, QR code - Fitness, Chat and so on. As a freelancer with rich experience in Android I am seeking right client who hope to success of his(her) IT business. "Time is Gold and Credit is ME !" is my slogan. Thanks for your time. Best Regards.

    $20.00 /hr
    0 hours
  9. Boris D.

    Boris D.

    iOS/iPod/iPhone/iPad/Swift/iWatch Developer

    Ukraine - Last active: 1 month ago - Tests: 1

    Overall 8 years of work experience, near 5 years of iOS development experience. Full cycle of iOS development, architecture design, issues fixing, updating, existing apps, submitting to Appstore ans support. I developed various iOS apps by using Objective C/Swift. - Dating apps similar Tinder - Instagram clones (photo video share, comment, like, etc) - Photo editing apps - Fitness apps - Shopping apps with payment gateway - live audio/video streaming .... I can do any app you want. Thanks.

    $36.00 /hr
    0 hours
  10. Awais Emaan

    Awais Emaan

    Mobile Developer

    Pakistan - Last active: 2 days ago - Portfolio: 1

    It's era of mobile and you need effective and efficient mobile application for you business need. Here you are, Experienced mobile developer believes in effective and efficient mobile app that meets client need. Professional software engineering degree knows application life cycle and phases from development to deployment. Adopt following activities during app development: -establishing a detailed program specification through discussion with clients; -clarifying what actions the program is intended to perform; -breaking down program specification into its simplest elements and translating this logic into a programming language; -devising possible solutions to anticipated problems; -combining all elements of the program design and testing it; -testing sample data-sets to check that output from the program works as intended; -conducting testing and installing the program into production; -reacting to problems and correcting the program as necessary; -evaluating and increasing the program's effectiveness; -adapting the program to new requirements, as necessary; -writing detailed documentation for the operation of the program; -consulting manuals, periodicals and technical reports to learn new ways to develop programs and maintain existing skills and knowledge; -updating, repairing, modifying and developing existing software and generic applications.

    $16.67 /hr
    0 hours