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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, 122 json projects are completed every quarter on Upwork.

122

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 4.67.

4.67
Last updated: August 1, 2015
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  1. Vitaliy Adamchuk

    Vitaliy Adamchuk

    Senior iOS/Android Developer - Swift Expert

    Ukraine - Tests: 8 - Portfolio: 6

    I'm very professional mobile developer that have rich experience and deep knowledge of Software Engineering and Architectures. I love creation and innovation, treasure what i have created. Learning new technology or programming language is my passion. I delight in explaining complicated technical concepts to give my clients easy access to see what's going on "under the hood". I'm very amazing software engineer with 6+ years of experiences. I can provide you everything in my major programming area such as: 1. Mobile App Development -iOS/Android Social Media/Social Networking App -iOS/Android Chat/Messaging App -iOS/Android Video/Image Editing/Sharing App -iOS/Android Audio Editing App/Tool -iOS/Android GPS Tracking/Sharing App -iOS/Android Real Estate App/Business App -iOS/Android Taxi/Restaurant Service App -iOS/Android Medical/Fitness App -iOS/Android POS/eBay/eCommerce App ... ... ... 2.Web Development -RubyOnRails based WebSite -PHP, MySQL, Javascript, Html5, based WebSite -Wordpress, Magento, Ecommerce -SASS, MongoDB, Symfony, -Python/Django... ... .... ... 3. WebGL/OpenGL/GLSL -3D renering/modeling/mesh/geometry -Three.js, OpenGL ES, GLKit, GPUImage framework and other various 3D frameworks. .... .... ... 4. Mathematics, Physics ... ... ... I'm quite a fan of agile approaches for programming and I do the job in a very punctual and detail-oriented manner. I am always ready to chat via Skype or gmail in most of EST working time zone and would be happy to set up a convenient time to discuss the project you have in mind and your ideas. I am a result oriented person, fully dedicated to my work. I will provide you Top QUALITY product to you within your time deadline ALWAYS. I am also a person to be trusted, honest and reliable. I look forward to a long-term relationship based on trust, honest and HIGH QUALITY WORK. Please let's go for your project. Sincerely. Vitaliy Adamchuk. :)

    $30.00 /hr
    249 hours
    5.00
  2. Edward S.

    Edward S.

    Expert Web Developer

    United States - Tests: 1 - Portfolio: 12

    Hi there, my name’s Ed and I am a web developer living outside of Green Bay, WI with my lovely family. I build clean and functional interfaces. With a hunger to constantly grow and evolve as a developer, I currently attend ITT Technical Institute for software development to expand on and learn new skills. I offer a new and different approach than most people. I am able to think outside the box to provide solutions that others cannot. My goal is to insure that every client is fully satisfied from the beginning of a project and even past the completion of it. I care about all of my clients and I want them to be fully satisfied with everything from the start of the project and well past the end as well.

    $25.00 /hr
    70 hours
    4.27
  3. Mayank P.

    Mayank P.

    Web Development-PHP/Codeigniter/Laravel/FB API/Angular JS/API Dev/CMS

    India - Tests: 4 - Portfolio: 7

    I am develop a web based application in PHP Codeigniter / Laravel framework.I have 3 years of work experience in web development.If i get the opportunities then i deliver user friendly web base application (website) as well as support to my all clients. My skills include 1)Website Development :- PHP , Codeigniter/Laravel Framework , Facebook App Development , HTML , Jquery , Javascript , HTML5 , Webrtc , Angular Js , ajax , cms-development. 2)Website design :- Website design , Photoshop , Responsive mobile friendly design 3)CMS development Wordpress. 4)API Development :- JSON , XML and SOAP/WSDL based web services. 5)Database :- mysql , phpmyadmin , sql Lite. My other skill set include iOS & Android using Xcode , Automation Testing.

    $15.00 /hr
    93 hours
    5.00
  4. Erik Miller

    Erik Miller

    Senior JavaScript/HTML5/CSS3 Front End Developer

    Germany - Tests: 3 - Portfolio: 3

    Hi. I'm working over 10 years with web tech. I know the JavaScript, html5, css3, SASS and responsive for desktop and mobile very well. My skills: HTML5(canvas and svg), HTNL4, CSS3(bootstrap and foundation), CSS2, JavaScript, jQuery(jQuery mobile), jQuery plugins. Specially, My core skill are javascript framework and javascript apps such as angularjs, node, impactjs, Rephaeljs, D3 and plugins. I'm beginner in upwork. So, Good feedback is important to me than any pay. I'll guarantee the my results and our communication speed. Thanks. Erik.

    $38.89 /hr
    90 hours
    5.00
  5. Michal Milek

    Michal Milek

    Mobile Developer(iOS/Android/Web)

    Poland - Tests: 7 - Portfolio: 4

    Hi, I 'm Michal, a gifted software developer based on Poland, mostly working on Mobile applications of all kinds of using Objective C, Java, PHP, My SQL. I have been developing native Objective-C apps for over 3 years. I don't use tools like PhoneGap or Appcelerator. I have direct experience with Apple's policies, device capabilities and account management procedures from publishing my own apps. By hiring me you would benefit from my extensive skills and experience. This is my major technologies. - iOS native app development(Objective C, Xcode, Swift...) - Android native app development(Java, Android Studio...) - Web backend service(PHP, JSON, AWS, Parse...) - Design My goal is to develop the perfect product on a vision of the client's business requirement.

    $55.56 /hr
    12 hours
    5.00
  6. Zhen Long

    Zhen Long

    Expert iOS and Android App Developer

    China - Tests: 7 - Portfolio: 9

    @@@ High quality!, Exactly deadline!, No impossible project! @@@ Dear all clients, An Agile and Motivated developer who won't quit work until it's done and client is satisfied. I have over 5 years of experience working with iOS & Android platforms and am very fluent in their native code. I am well versed in iOS & Android app programming language such as Object-C, Swift, Java. Also I have about 1 year of experience working with Apple Watch app development. I always use the newest technologies and solutions for the development of high quality applications. My core skills and experiences in mobile applications and web development are: - General IOS6/iOS7/iOS8 Android 2.3 or higher Objective-C, Swift, Java iPhone SDK, Cocoa, Cocoa Touch Frameworks - Dev Tool Xcode, Android Studio, Eclipse IDE - Map Kit and GPS Using of Google Map and Apple Map User navigation and Tracking based on GPS data - Web service integrating JSON, SOAP, XML and REST APIs Codeigniter, CakePHP Parse.com - Social networking integration Facebook, Twitter, Instagram, Youtube, Flickr - Source Management SVN, GitHub If you need a high-performance and high-quality mobile application, I am glad to help you. Zhen Long

    $40.00 /hr
    50 hours
    5.00
  7. Sandro Albert

    Sandro Albert

    Mobile Developer

    Switzerland - Tests: 3 - Portfolio: 3

    Hi, Over the last 5+ years, I have developed a wide range of iOS/Android applications, Social Networking Apps, Google Map Apps, Photo / Video Sharing Apps, Dating Apps, Taxi App, Restaurant delivery Apps, File uploading Apps, Chat Apps, Health/Fitness Apps, Business  Apps, Travel Apps and so on. I'm aiming at building highest quality apps which should be more competitive than others in the market. Equipped with most up-to-date technologies and always keep a sharp eye on the trends of markets. I am very familiar with the Programming Languages/IDEs such as Objective-C, Java, C/C++, HTML, XCode, Eclipse, Android Studio and more. I have rich experience in Parse.com and AWS and more as well as Parsing JSON, XML. I have also enough experiences in 3rd Party APIs like Facebook API, Twitter API, Instagram API and more. My experience - 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 - Sqlite, Mysql Thanks.

    $30.00 /hr
    49 hours
    5.00
  8. Roman Petrashkevich

    Roman Petrashkevich

    Mobile Developer

    Belarus - Tests: 2 - Portfolio: 6

    Responsible and motivated software engineer with 5+ years of experience in mobile development, mobile game development and web development. Major platforms I worked with are Android, iOS, Windows Phone, Unity game engine and Java EE. I am a hardworking person educated in the field of Applied Mathematics with excellent development and communication skills. I have designed, developed, maintained and deployed projects of different complexity and technology. I also have a lot of experience in working with geographically sparse technical teams, customers and companies. Over my career I have gained strong capabilities in providing the best solution for customer needs, in terms of good balance between quick delivery, functionality, reliability, performance and maintainability, adjusting the system depending on the specific environment, constraints and people. Please feel free to ask me to provide a CV.

    $30.00 /hr
    30 hours
    5.00
  9. Will Spencer

    Will Spencer

    Web developer that specializes in WordPress

    United States - Portfolio: 14

    I'm a full-time web developer that specializes in fully responsive, dynamic and interactive websites. I've been doing web design and development work for the past 15 years. I've worked for small and large companies and have conducted freelance web projects throughout that time period. I work with HTML5, CSS3, WordPress, PHP, Javascript, jQuery, AngularJS and am considered an expert in each area! A great deal of my work involves WordPress customizations. I've been creating custom WordPress themes and plugins since 2008 and enjoy making highly customized WP products for clients. I prefer developing long term relationships with my clients, so I emphasize constant communication to make sure the final results are EXACTLY what the client is looking for. You'll also see that I have a 100% positive feedback rating here, so you can rest assured that the job will get done right!

    $50.00 /hr
    44 hours
    5.00
  10. Darshan Prajapati

    Darshan Prajapati

    Full Stack MVC | C# | Web API | Web services | SQL | JQuery developer

    India - Tests: 11 - Portfolio: 7

    # Experienced Full Stack developer with sound knowledge in MVC, ASP.NET, LINQ, Windows Service, Web Service ,WCF, WPF, AJAX, JQuery-Mobile, Boot-strap, CSS3, jQuery/JavaScript,Web API, AngularJS , HTML5 # Facebook-Google Plush-Twitter API, Google Analytic API, Salesforce Datatbase SYNC, Amazon Web Service, OAuth Implementation # 5+ Years of working experience with T-SQL. Highly skilled writing complex queries, views, stored procedures, table valued functions,and so on. Knowledge of database design and implementation in MS SQL server, Oracle, MS Access, MySQL, SQLite

    $17.00 /hr
    778 hours
    4.85