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: 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

    $40.00 /hr
    161 hours
    5.00
  2. David Mulder

    David Mulder

    Senior Engineer for Mobile APP(IOS&Droid).

    Netherlands - Last active: 12 hours 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 device 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. 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
    3 hours
    4.98
  3. Stefan Bowman

    Stefan Bowman

    PHP, web development and Multimedia

    Italy - Last active: 6 days ago - Tests: 5

    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
  4. Amit Kumar

    Amit Kumar

    ASP.NET and MVC Software Engineer

    India - Last active: 2 days ago

    Over the last 4+ years, I have developed a wide range of websites using HTML, .NET /mvc, using sql server 2008/2012 in C# ,VB and PHP using my-sql including sites for startup companies and small businesses. My core competency lies in complete end-management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. I also have great experience in the following areas: - Javascript/ Jquery/ Ajax & jQuery, jQuery UI - HTML/ XHTML/ CSS - JSON/ XML - MS SQL server 2005, 2008,2012 - Visual Studio 2.0/ 3.0/ 3.5/ 4.0/5.0 – ASP.NET/ VB/ C# - .MVC 2.0/ 3.0/ 4.0/5.0 Razor - Web services, LINQ - Entity Framework - APIs (Twitter, Facebook, Google+, Instagram, LinkedIn,Long Tail) - Core PHP - My SQL Server -Kendo UI -Telerik .NET UI Controls -SVN/TFS

    $11.00 /hr
    24 hours
    5.00
  5. Christoph Peters

    Christoph Peters

    Senior App Developer

    Germany - Last active: 14 days ago - Tests: 2

    Dear Clients. Over the last 6 years, I had developed a lot of successful mobile apps. Most of them made great success on the App-store and Google-play. My Expertise are - iPhone, iPad, iPod Application Development, iPhone Support, iPad UI Android Development, Android SDK 
- GPS(iPhone/Android), Google Map, MapKit, GeoLocation, CoreLocation, CoreDate, CoreLocation on mobile SDK 
- Objective C, C++, Java, Java Script
 - In-App Purchase(iPhone/Android), iAd, AdMob(iPhone/Android), AdWhirl, TapJoy, RevMob(iPhone/Android), Flurry(iPhone/Android), ChartBoost : iOS(iPhone/iPad) and Android 
- Mobile web services such as JSON, XML, SQLite, Html5, CSS, MySQL, Oracle, JQuery
 - Mobile Graphic Design : (iPhone/Android/Windows) 
- Barcode, QR scanner (iPhone/Android)
 - Cocos2D, Box2D, OpenGL, Unit3D : iPhone/Android
 - Push notification(iPhone/Android), Local Notification on Mobile app
 - SVN, GitHub, Bitbucket I look for long-term relationship based on trusts and successes. If we have a chance to work together, I am sure you will be very satisfied with my work like my previous clients did. Thank you Christoph

    $55.56 /hr
    286 hours
    5.00
  6. Frederic Bonnet

    Frederic Bonnet

    France - Last active: 3 days ago

    Better call Fred. I code therefore I am. I wrote my first program when I was 12. It was on a 16-kB Sinclair ZX-81 plugged on the living room TV. Ah, memories. Professional R&D engineer since I'm 23. Now I am 41. After all these years I think I can program just about anything, from back office to end user GUIs. I especially like algorithmic stuff (I have a research background in CS and computational geometry) and system-level C. But while implementation is only the final stage, design is the most important part in a project. I've been a senior software architect for some years now, so I can help you besides mere coding tasks (e.g. refactoring existing codebases). I also enjoy data mining and analysis. I'm fluent in English but my native language is French, so if you also have translation jobs that involve technical knowledge then I can help as well. I routinely write technical documentation for my daytime job in the telco industry (specifications, design, operation manuals, etc).

    $25.00 /hr
    22 hours
    5.00
  7. Wolfgang Herrmann

    Wolfgang Herrmann

    Super Mobile App Developer

    Germany - Last active: 1 day ago - Tests: 4

    I pursue the Best Quality. I will do best for your satisfaction. I have 6+ years of experiences in mobile app programming that include almost 100 projects. My skills: iOS, Android, Windows app programming cocos2d, box2d, OpenGL, Corona, Unity 3D Game Center, In-app purchase, RPG Server Chartboost, Revmob, Upsight, Adcolony, Applovin, Admob, Vungle, Flurry, mopub, Tapjoy Facebook, Twitter, Instagram, Youtube MySQL, SQLite, Oracle, ODBC Parse.com, Amazon S3, Twillio Chat and Message Engine Video/audio/image processing Video/audio streaming

    $33.33 /hr
    20 hours
    5.00
  8. Bhushankumar L.

    Bhushankumar L.

    Full Stack Web Developer

    India - Last active: 5 days ago - Tests: 10

    My major competency is Node.js, Python, and Java for building interactive web-sites and deployment using AWS for business and management purpose. I can provide services in next scope of technologies: Programming languages: Python, Java, JavaScript Standards: XML, Ajax, JSON, REST, OOP, MVC Python Frameworks: Django, Web2Py, Bottle, Flask Java Frameworks: Struts, Spring, Hibernate JS Frameworks: JQuery, Angular JS, EXT Js, Node.js + Sails.js , Flot Charts, Google Charts UI Frameworks: JQuery UI, Twitter Bootstrap Databases: MongoDb , MySQL, SQLite, SQL Server Caching Data structures: Redis, Memcache Web API: Google Analytics, Google Oauth, Google Map, YouTube API. Apache TIKA, Apache Lucene, Apache SOLR, Yahoo Contacts, Edmodo API, Facebook API Payment Gateway: PayPal, Stripe Version Control: Mercurial, Git, SVN Designing Tools: Rational Rose, Edraw Max Tracking Tools: JIRA, Mantis CI Tools: Travis, Shippable, Jenkins Operation Systems: Windows, all Linux distribution Server: Amazon Web Services, Apache HTTP, Apache/Tomcat, Samba File Server, Nginx, VMware, DNS Security: VPN, SSH, SSL/TLS Other Skills: Google Web Master Tool, Google Analytics Tool, Google Chrome Webstore App Development My services include development of web sites and web based application, customization of existing solutions, architecture design (all server, code and database levels), bug fixing, technical support and consultations. My work style is based on details, quality and responsibility. Main rule of my work is `Do your work in same way like you would like it to be done for you`. I'm opened for communications with hires because I trust that this guarantees that all questions will be discussed in details and work will be done in time. I am giving you to done work on time with your requirements. Please fill free to ask for demo if needed. Thank you, Kind Regards, Bhushankumar L.

    Groups: Pligg

    $22.22 /hr
    108 hours
    4.85
  9. Nahid D.

    Nahid D.

    Expert Web Developer

    Bangladesh - Last active: 3 days ago

    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
    89 hours
    5.00
  10. Kent K.

    Kent K.

    Senior Mobile App (iOS/Android) Developer

    Finland - Last active: 12 hours ago - Tests: 9

    Developing applications for iPhone/Android was my favorite hobby, and now, after 8 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 app wireframe designer, so if your project requires a graphics and constructing the UI, you may be interested in his services too. I have all required equipment and devices for effective testing and debugging, such as iPhone 4S,5S,6, iPad 2, iPad 3, iPod Touch 5, Galaxy Tab, Samsung Tablet & smarphone, HTC, Lenovo smartphone.

    $70.00 /hr
    52 hours
    4.86