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. Kent K.

    Kent K.

    Senior Mobile App (iOS/Android) Developer

    Finland - Last active: 16 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
  2. David B.

    David B.

    Senior Mobile App (iOS/Android) & Server Back-end Developer

    Netherlands - Last active: 16 hours ago - Tests: 17

    *** 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, Xamarin, .NET - Android Native (Studio/Eclipse): Java, Xamarin, .NET - Hybrid Apps: Phonegap by Ionic, Cordova SDKs, JQM, Kendo UI, Angular Mobile UI - Mobile Games: Cocos2D, Cocos2DX, Unity3D, Board SDK *** Mobile Application Services Support *** - Analytics and Testing : Google Analytics, Apptentive, KIF testing framework - Back-End: JSON-RESTful APIs as well as 3rd Party SDK integration like Parse, Twillio - Services: Cloud, FB, Twitter, LinkedIn, Twitter, Google, Photo & 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

    $70.00 /hr
    346 hours
    5.00
  3. Vigorous Web

    Vigorous Web

    Web Developemt, SEO, Data Entry Services

    Pakistan - Last active: 3 days ago

    Vigorous Web conveys everything you need to communicate effectively on the web. We understand how users interact with digital media, so we have usability at the foundation of our services. We give great importance to fresh ideas and crystal clear goals. Vigorous Web developing team is made up of multi-talented illustrators, designers, writers and software developers, delivering the right mix of creative finesse. Our team can create everything from single-page online brochures to interactive database applications for large companies or applications. We build and maintain high quality web site design and e-commerce web development solutions for a wide a range of businesses and individuals. We provide professional-level programmer and customized web development solutions in PHP, Open Source, Wordpress, Drupal, CakePHP, YII, Mobile UI, Responsive Sites, ASP, ASP.Net, AJAX, ATLAS, Flash Actions Script Programming, JAVA etc to our clients. We provide SEO and Data Entry services.

    $8.00 /hr
    10 hours
    5.00
  4. Oswald Daumiller

    Oswald Daumiller

    Senior Android Developer

    Norway - Last active: 2 months ago - Tests: 7

    Do you need great Android App developed with high quality and tight deadline? You came to the right place. Last 5 years I have developed various apps for Android including but not limited to social networks, clients apps for various web-based solutions, custom firmwares, complex solutions involving working with Bluetooth and USB hardware connected to android device. I always try to find the way to improve my skill in programming without impacting working performance and things to make client happy. In each project I try to use best practices to make code runs fast and let project became bigger without additional effort to rewriting parts of the application in future. My projects have a lot of technologies used: - Connection to the server and receive JSON , XML, PLIST files and .png and .jpg images. - Parse/Upload large data from/to server. - Working with camera, streaming video data, apply various effects to real-time video. - Bluetooth communications. - Connecting android devices to USB accessories. - Optimize loading big images into device memory. - Different layouts to show complex content to user. - Asynchronous work everywhere its required to load data dynamically and lets UI run data. - Animations. - Push notifications - Ads Don' hesitate to contact me any time, and lets make this word easy with quality applications. I will help you! Thanks.

    $38.89 /hr
    171 hours
    5.00
  5. Alex A.

    Alex A.

    Mobile/JS/Vision(GLSL/OpenGL/WebGL) Expert - Ready for iOS8

    Ukraine - Last active: 2 days ago - Tests: 8

    Hello Clients. I've been developing various complex software over 7 years with my clients based on TRUST. TRUST and HONEST is my rule in developing any software. During last 7 years, I have developed amazing 50+ Mobile/Website/Computer Vision applications that require high skill of engineering and programming. I'm very familiar with Objective-C/Java/Javascript/Python/SASS/RubyOnRails programming. Here are my Software Development area: Mobile Social Networking/Social Media App Development Mobile Video/Image Processing, Video Editing, Video Streaming, Speech Processing, OCR Search Engine Optimization Google Analytics Algorithm Development JIRA,Bitbucket,SVN,Git,GitHub,... RESTFul/RESTKit/MapKit Mobile GPS Location Tracking, Google Map App Real Estate App && Website Development Cocos2D/Box2D/Unity3D Game Development GPUImage Framework,CoreData,CoreAnimation,OpenCV library, Dirac library, CoreJava. Storyboards, Xib, Mobile App UI/IX development Javascript--Angular.js,Node.js,Backbone.js,Knockout.js,Three.js,D3.js PHP/MySQL/SASS/RubyOnRails-based Website Development Python/Django Symfony/MongoDB WebGL/GLSL programming XML/JSON/HTML/XHTML Various Search Algorithm, Mathematics, Physics, other likes.. I have iPhone4S, iPhone5S,Android Samsung GalaxyS3 and S4, iPad, Android Pad for testing apps. If you hire me then you will get successful result. I would like to keep long-term parter relationship with you based on TRUST and HONEST. Thanks.

    Groups: Application Developers Alliance

    $35.00 /hr
    928 hours
    5.00
  6. Lakshman singh G.

    Lakshman singh G.

    Sr. Software Developer

    India - Last active: 1 month ago - Tests: 9 - Portfolio: 3

    Over the last 3 years I have been working on • iOS/Objective-C • XMPP • SpriteKit • JSON • PHP/MySql • HTML • CSS • Javascript I have also have good amount of experience in Mobile Application too as I worked in past 1 year Seeking a position to utilize my skills and abilities in the Information Technology Industry that offers professional growth while being resourceful, innovative and flexible.

    $10.00 /hr
    22 hours
    5.00
  7. Atif Majeed

    Atif Majeed

    Creative UI/UX/GUI Designer & Front End Developer

    Pakistan - Last active: 1 day ago - Tests: 9 - Portfolio: 25

    I am good in Web development, Designing, PSD Web Template Making, PSD to HTML(HTML5+CSS3 with cross browser capability) Photoshop Editing and Data Entry.(7 years of experience in Adobe Photoshop+Adobe Illustrator) I am well intimate with Prestashop platform for custom websites, themes & modules development. I have expertise in handling big projects in Prestashop and developing custom / complex sites & modules. I have delivered high quality work to my clients in timely manner

    $10.00 /hr
    176 hours
    4.94
  8. Simon R.

    Simon R.

    Php /Mysql web developer ,Database expert.

    India - Last active: 2 days ago - Tests: 3 - Portfolio: 3

    I am a professional web developer specializing in PHP+MySQL/HTML5/CSS3/Jquery/BootStrap. I offer services like web developing, optimizing websites for search engines. I am familiar with all the latest trends and technologies in the web development industry. When it comes to experience, I've been working in web development since 2010 which is 4 years as of now(2014). I have worked on numerous projects in all these years creating a big list of happy clients. Technologies I use in my projects: 1. PHP. 2. MySQL for backend. 3. HTML5/CSS3/JQuery. 4. Ajax /JSON 5. API's(Facebook,Linkedin,Google,Twitter) 6. Wordpress. 7.Google API's Charts,Custom Maps etc. 8.Dropbox API. 9.Twilio API. 10.Tokbox (Opentok) API Features of my work: 1. Responsive design. 2. Simple and elegant design. 3. Secure programming. 4. Hassle-free upgrades. 5. After sales support like installation and troubleshooting. I would like to highlight here that I am the right person if you are looking for a PHP developer for taking your business online i.e. Developing an online store. I love working with friendly and feedback giving people and I try my best to complete their work well within the due date without compromising quality of work. I hope that you will find me eligible to work for you. Thank You!

    $6.00 /hr
    249 hours
    4.74
  9. Harsh Sharma

    Harsh Sharma Agency Contractor

    iOS Developer (Swift and iOS 8)

    India - Last active: 2 days ago - Tests: 7 - Portfolio: 12

    last 4 year, I have developed a wide range of Mobile application using Objective-C , and X code SDK. my main objective is customer satisfaction and provide better service to my clients. i want to increase my business possibilities through customer satisfaction and provide better services. Skills : Objective-C,Json, XML iPhone, Android

    Groups: Corona Labs

    Associated with: Twozeroscorp

    $15.56 /hr
    590 hours
    4.93