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

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


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Time needed to complete a API Development project on Upwork.

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

Last updated: September 1, 2015
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  1. Manali D.

    Manali D.

    One Stop Corner for Website/Web Development | Mobile Apps | Softwares

    India - Portfolio: 4

    *** Topmost Web Designing and Development - Android development - iOS development Company *** Array Infotech Pvt. Ltd. is a vision to turn your dreams into reality, started in 2010. It is a software development company located at Gujarat, India. We have nearly 23 employees with varying and certified technical skills. We are now 5+ year old company with strong leadership having nearly 7 years of IT Industry experience. We have worked on projects for web based development, client-server technologies development, web designing, Mobile app development product development. Visit us surely at: Our Core Expertise: ------------------ - Web Applications Development - Enterprise solution development - Desktop Applications/Desktop Widgets - Integrating 3rd Party web services - SOA enabled applications development - E-Commerce application development - Maintenance and enhancement of existing application - SaaS enabled application development - Product engineering - Mobile application development - Gaming development Technology Expertise: -------------------- - VF, APEX, classes, triggers, pages,packages, web service call outs, s-controls, scheduled batch jobs, customer portal development, Integration with external applications, Conga developers integration, QuickBooks integration - .Net 1.1/2.0/3.0/3.5/4.0/4.5 (C#, VB.NET), ASP.Net, Winforms - WPF, WCF, Silverlight, LinQ, Windows Compact Framework - Web application, Desktop application, Windows services and Web service development - Classic ASP, Visual Basic 6.0, VB Script, Java script, jQuery - Databases - MS SQL , My SQL, Oracle, Access - Reporting: Crystal Report, SSRS, Jfree Charts, Jasper reporting - Server Technologies : BizTalk, SSIS, SharePoint, IIS, Tomcat, Weblogic, Webspear - Java/J2EE, EJB, JSP, Servlet, JSF, J2ME - Frameworks : Spring, Hibernate, Struts, MVC, Tibco GI, DNN, Rich Faces, Maven - Development tools- Visual Studio, Eclipse, RAD/RSA - Third party integration - Telerik, DevExpress ,Yahoo UI, Backbase, Quickbooks, Conga Developers, Aspose.PDF, Aspose.Slides, Adobe InDesign, iTextSharp - PHP, open source frameworks like Zoomla, Drupal, Wordpress, Zend, CodeIgniter - Testing - NUnit, jUnit, TestDirector, Selenium - Web 2.0, Ajax implementation - iPhone/iPad/Android development ----------------------------- Our AIM is to ----------------------------- - Provide 100% Satisfaction to our customers - Provide Quality Service - Provide Value for money We believe in best and we think that our customer business grows, our business too will grow.

    $15.00 /hr
    0 hours
  2. Patricio Mac Adden

    Patricio Mac Adden Agency Contractor

    Computer Science graduate, Ruby, Rails, Contributor to Sinatra, TDD

    Argentina - Tests: 4 - Portfolio: 1

    I'm a Computer Science graduate with 6 years of experience in Web Development. I love Ruby, Rails, Sinatra (which I contribute to) and Test Driven Development.

    Associated with: TEMPL

    $33.33 /hr
    12 hours
  3. Sergey Sysalov

    Sergey Sysalov Agency Contractor

    Senior developer / Project manager

    Russia - Tests: 1 - Portfolio: 3

    More than 15 year in IT. Behind participated in dozens of successful world-famous projects such as,,, and others. Flexible in technologies selection: Single Page Applications: WebAPI + AngularJS (Denovo) Mobile applications: Android + iOS through the site API Cloud solutions: Azure AD, Azure Notification Hubs, Azure SQL (Denovo) Programming languages: .NET#, Java, JS, PHP, Perl, Ruby and even pure C/C++. DBs: MSSQL, MySql, PostgreSQL, Sybase, Oracle, NoSql (MongoDB). A lot of experience in using 3rd party APIs: Payment: Paypal, Authorize.Net, Webmoney, Yandex Money, Yellowpay, DebitSucces, different credit card gateways, etc. Logistic services: FedEx, DHL, Swiss Post, UPS and other. Notifications: SendGrid (email), Twilio (SMS), Azure Notification Hubs (push notifications).

    Associated with: SysTeam Russia

    $30.00 /hr
    0 hours
  4. Vadim Kuznetsov

    Vadim Kuznetsov Agency Contractor

    Product manager with technical background

    Russia - Portfolio: 2

    Hi and welcome! I'm a Product/Project manager and developer with technical expertise in the web industry. I have enough experience in building high level applications. I can work as the Product or Project Manager. Favorite projects for me are: startups, SAAS, CRM, e-commerce, ERP, integration with different services, etc. I love working with modern technology and interesting people. I always go to a meeting clients and I am ready to discuss and offer ideas. In creating a project, I believe that the key role occupied by motivated people and culture. So, I love to use Kanban and agile development like Scrum. I do not want to work with people who believe that they can get a great staff for a minimal fee. Also I do not cooperate with people who create applications to trick people. I am always open to learning new and make new cooperation. So If you have any questions bottle of whiskey whit ice, please feel you free to ask. I would be happy to answer. I have a Bachelors in Software Engineering from Novosibirsk State Technical University. Listed below are my experience and skills: Project management: - Creation and development of web services, sites, start-up projects. - E-commerce projects - Project management, market analysis, marketing. - Work with the team, motivation. - I know how to set goals and objectives in an uncertain situation. - Public speaking and presentations. - Excellent communication skills. - Training of employees. - Agile Scrum, Kanban, pmbok - Tools: Jira, redmine, teamlab, trello, worksection, wiki, conflurence - xmind, ms project, ms office, ms viso, yEd Little designer: - Photoshop, Fireworks, Flash, Corel, AI, Balsamiq Mockups - I understand usability Also know: PHP, JS, Mysql, API, HTML, CSS, JS, AS3, 1С bitrix, WordPress, codeigniter, YII Thank you for that you have read to the end Look forward to your offers Regards! From Siberia of Russia with loving care ;)

    Associated with: LeoCoder

    $20.00 /hr
    0 hours
  5. Baban Sharma

    Baban Sharma

    PHP Programmer | Wordpress Expert

    India - Tests: 3 - Portfolio: 6

    Hi there, I am expert Php Devloper with four year experience. I have strong knowledge of core php, Jquery, wordpress , codeigniter and API integration in PHP . I had worked on many web projects including for small scale projects to large scale projects. I believe in making clients happy by converting there dreams into reality and also provide helps in there projects as a friend in future also. My skype id is baban_ynr . Feel free to contact. Thanks

    $5.56 /hr
    0 hours
  6. Dheeraj Kumar

    Dheeraj Kumar

    Ruby On Rails Developer

    India - Tests: 1 - Portfolio: 3

    I am a Rails hacker and an open source evangelist, I do provide 24*7 innovative and quality service. I do development, support, consulting and training for ruby on rails, python and php. Databases: MySQL, PostgreSQL, Postgis, SQLlite, MongoDB, Hstore Front end: Angularjs, Ember.js, Erb, Slim, Haml, Bootstrap responsive design Languages: Ruby, Python, PHP Frame works: Ruby on rails, Django, cakePHP, magento, wordpress Cloud hosting deployment: Heroku, AWS version control system: Git and SVN Operating system: Linux, Mac and windows project management tools: Base camp, Git hub, Bit bucket, JIRA Interested in doing Devops, web-services, e-commerce app, payment gateway CMS, Hosting. Key points: Responsive design for desktop, mobile phones tablets and for all the web browsers Test-Driven Development Online traning

    $10.00 /hr
    0 hours
  7. Karl Golka

    Karl Golka

    Full-stack AngularJS & Microsoft .NET Developer/Designer

    United States - Portfolio: 4

    I've been successfully delivering enterprise-grade .NET web software for over a decade for such clients as AT&T, Hilton, LG, Chicago Public Radio, Visalus Science, Sparrow Healthcare, Oceaneering -- and even helped briefly on! Recently, my performance at 1218 App Team on a highly aggressive deadline for a complex medical industry project helped the team deliver on-time and secure a larger budget and significant follow-up work. That project involved daily 9am video scrums stand-ups, tight weekly Agile sprints, a cutting-edge responsive HTML5 canvas-based AngularJS front-end and a Websockets/SignalR Hub/RESTful API back-end, authenticating with bearer tokens via OWIN middleware. As a full-stack developer, I can handle a sizeable-budget project independently as well as work efficiently with both on-location and remote teams. I have years of experience working directly with clients, both domestic and international. Currently, I am tidying-up after migrating all my client sites to AngularJS and over-hauling – and am available for projects and opportunities.

    $61.11 /hr
    0 hours
  8. Rizky Ariestiyansyah

    Rizky Ariestiyansyah

    Full Stack Developer

    Indonesia - Portfolio: 4

    I am a very well motivated Front End Web Developer with excellent communication skills. Throughout my education and employment career I have worked effectively in group situations and individually. I am a very friendly and outgoing person huge potential to reach the top within the field of web development. Specialties: My core skills are CSS 2 & 3, JavaScript, Python, Django, Responsive Design/Development, HTML5. In addition to these I am proficient in developing with AngularJS

    $15.00 /hr
    0 hours
  9. 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
  10. 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