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

API Development Job Cost Overview

Typical total cost of Upwork API Development projects based on completed and fixed-price jobs.

Upwork API Development Jobs Completed Quarterly

On average, 332 API Development projects are completed every quarter on Upwork.


Time to Complete Upwork API Development Jobs

Time needed to complete a API Development project on Upwork.

Average API Development Freelancer Feedback Score

API Development Upwork freelancers typically receive a client rating of 4.65.

Last updated: September 1, 2015
Clear all filters
  1. Loris Mazloum

    Loris Mazloum

    Agile Product Manager | Marketing and eCommerce Optimization

    United States

    I am fluent in both English and French. I live in Los Angeles, CA (PST timezone). If I apply for your job, it means that I know I can handle it easily, and it won't be a challenge for me to do. Time is valuable and I'm not looking to waste your time. I'm an agile project manager and SCRUM Product Owner. I can work alone, in a team or even manage your team using agile methodology. I have worked on a lot of projects, from the smallest ones, to ones that generated more than $7 millions revenue. I can help you with web and mobile development improvements, marketing, optimization and usability. If you have a product and want to improve it or get money out of it, I'm the person you are looking for. - Ecommerce (installation, setup, plugin / modules development, themes, configuration, automation ) * Prestashop * Magento * Shopify * Bigcommerce * Woocommerce * any other platforms - Marketing (campaigns creation, management, display, retargeting, remarketing) * facebook ads for websites, or mobile app installs, retargeting * twitter ads , twitter for mobile app installs, retargeting * adwords for search and mobile app installs * bing, yahoo * adroll, perfect audience for retargeting * mobile advertising platforms - email / push marketing * drip campaign * newsletter * event based emails / push * segment based emails / push - Analytics (setup analytics tools, setting up event tracking, goals, ecommerce tracking, segmentation) * event tracking * goals tracking * analytics dashboards * conversion rate, ROI, LTV and other important KPIs * web and mobile apps - Optimization * A/B testing optimization * Multivariate testing * Multi armed bandit testing * Landing page optimization I'm very good at following rules and procedures, but also love to give ideas and improvements suggestions if they are required and welcomed. As a bonus of my work, I will often find ways to improve the task that I have done, so you don't have to start from scratch every time you need this task done. Please contact me if you have any questions. Best regards, Loris

    $20.00 /hr
    0 hours
  2. Justin Shapiro

    Justin Shapiro

    IT Consultant

    United States

    No task is too big or difficult for me to accomplish. Experience everywhere from programming, to setting up a data centers. If I don't know something, I'm not afraid​ to tell you. I am a mainly self taught, hard working, great leader. If you're looking for help, or in need of a pair of new eyes to solve a problem feel free to contact me. ​

    $16.67 /hr
    0 hours
  3. Ryan Gyure

    Ryan Gyure Agency Contractor

    PHP Developer, Consultant, Start-Ups

    United States - Tests: 11

    Over the last 8 years I have developed a number of websites in HTML, PHP, and MySQL. Since a young age, I've been hacking away at code and coming up with better ways to do things. At the age of 14, I launched FusionXHost and created one of the first sustainable post2host web hosts. I have a wide range of skills working on a number of start-up companies and ideas. Since 2004, my company -- FXH, Inc -- has been providing a wide range of IT services all over the world and has severed as a springboard for a number of different start-ups. I have been the primary employee of FXH, Inc and generally do most of the work myself. I primarily focus on the technical side of start-ups and currently have an in-depth knowledge of PHP, MySQL, JSON, Zend Frame, RESTful APIs, and a number of popular third-party APIs (e.g. facebook, twitter, foursquare, etc). In addition to the coding side, I also work on server infrastructures using Citrix XenServer and Amazon Web Services. I also have experience with C-Corps, LLCs, and payroll accounting; both the state and federal filing requirements. I’ve been using Quickbooks since 2004 and very familiar with the software and accounting standards. In addition to the accounting, I’m familiar with the legal aspects of starting and running a company. I’m not an expert in these fields, but am a jack of all trades type and know enough in each area to be cost efficient.

    Associated with: FXH, Inc Agency

    $83.33 /hr
    0 hours
  4. Vijay P.

    Vijay P.

    Expert Web Developer | | Node | MVC | WCF | API | WPF

    India - Tests: 8 - Portfolio: 9

    Over 6 years of experience in Web Applications using Microsoft Technologies, .NET framework and JS framework. Quick and easy learning as well as pronounced talent to hand over knowledge, adaptability, creativity, burly logic. I’m analytical, devoted to job, undependable, sometimes perfectionist, but always loyal. Additionally I handle the pressure well, meeting the deadlines, being independent in solving tasks, etc. Listed below are my experience and skills. Programming languages: ASP.NET, c#, ASP.NET MVC 4/5, WCF, JavaScript, LINQ, Entity Framework, Telerik, Dev Express JS Frameworks: Node.js, JQuery, Angular JS Standards: XML, Ajax, JSON, REST, OOP API: Web API, Instagram, Google all API,Facebook API, Google Analytics, Google Oauth, SOAP UI Frameworks: JQuery UI, Twitter Bootstrap Databases: SQl Server, MySQL, SQLite, MongoDb Payment Gateway: PayPal, Stripe Web Servers: IIS, WAMP, Apache Tomcat Version Control: TFS, Git, SVN * 5+ years of experience with ASP.NET * 2+ year of MVC development * 5+ years of formal experience with HTML, CSS, JavaScript, AJAX and browser compatibility 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.

    $15.00 /hr
    1,238 hours
  5. Rohit Dhiman

    Rohit Dhiman

    Certified PHP/MySql developer

    India - Tests: 7 - Portfolio: 5

    I am a Senior Web Developer with 7+ years of experience, using CMS like Joomla! and E-Commerce platforms such as Magento and Virtuemart, among others. My proficient areas are: HTML, CSS, PHP, SQL, MySQL, JS/JQuery. Always trying to identify the best path to take and always put efficiency vs. time and costs. I have developed a wide range of websites using HMTL, DHTML, PHP, and MySQL including sites for startup companies and small businesses. My core competency lies in complete end-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. Thank you for reading this brief overview about me, you are more than welcome to invite me for an interview.

    Groups: concrete5

    $16.67 /hr
    4 hours
  6. Garon Alder

    Garon Alder

    Ruby/Rails Expert

    Germany - Tests: 3

    Hello! Thanks for your attention! I am Garon Alder from Germany and I am a professional ruby on rails developer. My skills and experience: 1. ruby on rails (both: rails 3 and rails 4) : about 5 years of experience. 2. html, css, javascript, jquery, twitter bootstrap, haml, slim, less, media query. 3. github and bitbucket. 4. heroku, amazon web service, capistrano, nginx, passenger, unicorn, puma, thin, ubuntu, linux server administration. 5. mysql, postgresql, sqlite, mongodb. 6. google apis, twitter apis, facebook apis, linkedin apis, restful apis. 7. TDD/BDD with rspec and cucumber, capybara 8. scraping experience with nokogiri, mechanize, poltergeist, headless and capybara. 9. slack, trello, pivotal tracker, jira. I can communicate well and I would like to work with other developers in a team. I am looking for a long term job and I can give you perfect result quicker than other developers since I am expertise in ruby on rails. If you want to build awesome ruby on rails website, I am here! Thanks again for your attention!!! Regards Garon

    $45.00 /hr
    0 hours
  7. Muhammad A.

    Muhammad A. Agency Contractor (5+ years) Certified Advanced Developer (501 and 201)

    Pakistan - Tests: 3 - Portfolio: 2

    Over the last 5 years, I have analyzed, designed and developed a wide range of business systems and applications. I am a certified developer, administrator and consultant with over 50+ successful implementations worldwide. My major expertise is in the following areas of Salesforce Development Services:- - Apex Classes - Apex Triggers - Visual Force pages - Sites - Integrations (WSDl / Json/ XML) - Rest API - Web services - Developing AppExchange Products - J Queries, Java Scripts, NodeJs, Angular JS - Payment Gateway integration with Salesforce Salesforce Integration Services:- -Integration of Salesforce with external web and desktop apps. -Develop custom in Salesforce to be used by other apps. - PHP website integration with Salesforce - Wordpress to Salesforce integration and plug-in development -.Net and Java Application integration with Salesforce - Native Android & iOS app development using Salesforce API and data Administration and Customization Services:- - Configuring the Vanilla - Object/Field Creation - Setting up Users, Roles & Profiles - Creating Workflow Rules - Writing Validation Rules - Creating Page Layouts - Loading data via Data Loader & Jitterbit Data Loader - Amazing analytics by creating various Reports & Dashboards - Sharing Rules - Views / Lookup / Search - Chatter Functionality - AppExchange Tools - Home Page Components - Multi Currency - Data Cleansing - Data Entry - Data Research - Setting up Campaigns & Email Marketing Tools I WILL ENSURE YOU MY BEST SERVICES FOR YOUR JOB.

    Associated with: S3Technology

    $15.00 /hr
    720 hours
  8. Nitesh C.

    Nitesh C. Agency Contractor

    Wordpress(themes & plugins), Magento ,PHP, MySQL, jQuery, CSS3

    India - Tests: 4 - Portfolio: 5

    I am very proficient in modern Wordpress theme and plugin development. Over the last 4 years I have developed variety of websites including but not limited to personal, corporate, e-commerce, and social with customized themes and plugins. Though I accept small projects like creating fixes to a current plugin/theme, I prefer long term ones like developing sites or plugins from the ground up. If I work on a team, I prefer working on the back-end part but I am pretty much as effective with front-end development. I am not much of graphic designer, but if given enough examples from which the site will be based upon, I can come up with a good modern design. I also have good experience in the following areas: SEO, Article Writing, Social Media and Marketing.

    Associated with: Expert Soft Tech Solution Pvt Ltd

    $15.00 /hr
    152 hours
  9. Bryan Oliver

    Bryan Oliver Agency Contractor

    Ionic, Angular, Node, Mongo, Express, and Mean Stack Developer.

    United States - Tests: 3

    I am a full-stack developer with a high level of expertise in Responsive and Mobile development. I can quickly develop applications that work on multiple device types (IOS, Android, Windows Phone) with secure Web and Restful Back-ends. I continuously work to learn and adapt to the ever changing culture of web technologies, and I am always up to date on the latest frameworks and development practices. Some of my specialties are in MeanJS (JavaScript full-stack), Ionic Framework, AngularJS, MongoDB, Sencha Touch, Sencha EXTJS, Mongoose, ExpressJS, NodeJS, Ruby, Ruby on Rails, Sql, and others. My passion is development with anything Angular or Node. Currently, I am working on a freelance contract in my home town (I came into it outside of Upwork). I am open to working some as needed jobs here on Upwork, but please inquire first with the nature of the job. If you need more than 10-15 hours a week, I cannot at this time accept.

    Associated with: Whitehall Technologies, LLC

    $44.44 /hr
    16 hours
  10. Shahid Q.

    Shahid Q. Agency Contractor


    India - Tests: 7 - Portfolio: 15

    Over the last 2 years, I have got rich experiences in the following areas: E-Commerce, Web service, EJB, Data mining & reporting, Security solution, Desktop application, Mobile applications and so on. Also I have developed a wide range of websites and Windows application using various .NET frameworks and SQL Servers including sites for start up companies and small businesses. My major developing languages are PHP, C/C++, HTML/CSS, Javascript, JQuery and so on. - PHP (eCommerce Framework, OOP/MVC Framework, CMS Framework) - Magento, Zend, Drupal, Wordpress, Joomla, Symfony, Kohana, CodeIgniter, CakePHP, Yii, osCommerce - JavaScpipt / jQuery / jQuery Mobile - SQL / MySQL / PostgreeSQL / Oracle - HTML5 / XHTML / DHTML / XML / CSS3 (reliable and cross-browser compatible layout for websites of different complexity) - C / C++ / Qt - Linux / Unix System Administration - Shell Script, Python, Perl - Android / iPhone / iPad / iPod - Ruby on Rails I am seeking opportunities to build websites from the ground up for you or your business. If you get any difficulty, feel free to ask me. Thanks for your time to review my profile. Shahid,

    Associated with: Expert Soft Tech Solution Pvt Ltd, Magento - Est Branch

    $16.67 /hr
    760 hours