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, 307 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 4.64.

Last updated: October 1, 2015
Clear all filters

Vladislav O.

Vladislav O. Agency Contractor

Web \ Cloud - Mobile Apps - Desktop

United Kingdom - Portfolio: 20

The expert team at Web Assistants are knowledgeable, highly qualified, and specialise in bespoke application design and development. Whether your business is newly formed or has been established for a long time Web Assistants can help you to meet all of your requirements and desires to fully promote and ensure the success of your business.

Associated with: Web Assistants

$68.00 /hr
0 hours

Krishna Chaitanya

Krishna Chaitanya Agency Contractor


India - Tests: 2 - Portfolio: 44

With 12 years of solid industry experience, we specialized in providing all kind of Design & Development related services. Including Mobile APP's, Web design, Web Applications Development, PHP5, HTML5, CSS3, eCommerce, API Integration, MySQL, Payment Integration, Wordpress, Responsive Websites, AJAX, SEO and Content Writing. Client satisfaction is our first priority, we offer cost effective services in Mobile Apps, Web Design and Programming. We merged with another Software Company and now we have 35+ Efficient Staff in all Technologies like Sencha Touch used for Mobile Apps, Dot Net, Java, PHP and Testing.

Associated with: Krishna Chaitanya - Ichnolite Technologies

91% Job Success
$16.00 /hr
0 hours

Danielle D.

Danielle D.

Software Development

United States - Tests: 1

Skills: Ruby, Rails, Sinatra, PHP, Python, Django, Flask, PHP, HTML, CSS, Responsive Design, HAML, CSS, SASS, LESS, SMACSS, Bootstrap, Foundation, JavaScript, CoffeeScript, AngularJS, Ember.js, node.js, Underscore.js, jQuery, SQL, Selenium, SVG, graphic design, APIs, InDesign, Photoshop, Illustrator, AutoCAD, RETScreen, HydroCAD, MatLab

$83.33 /hr
0 hours

Jammaica Mae Ignacio

Jammaica Mae Ignacio

Web Developer

Philippines - Tests: 5 - Portfolio: 2

I'm a full stack Ruby/Javascript (Front-end) developer with 3+ years of professional experience. I'm good problem solver and puzzle enthusiast holding BS computer science. Today I'm offering backend/frontend services as a freelancer. My main skills: • Ruby, JavaScript • HTML5, CSS3, Bootstrap, HAML • PostgreSQL, MySQL • REST, XML, JSON • Rails, Jquery, BackboneJS, Coffeescript • Photoshop • Experience working with APIs: Facebook Graph, GLOBE, Chikka, Github and serveral others • Git, SVN • Apache, Nginx • Amazon AWS, Digital Ocean • Linux • Understanding of OOP principles and software design patterns • Teamwork experience, JIRA, Pivotal Tracker I have a github and gitlab account. I developed a wide range of websites using Ruby, HTML, JavaScript, CSS and MySQL. I built sites both from scratch and using frameworks, developed custom modules and extended existing ones for my clients. Last two years I was working as full stack developer for an online accounting system (Indinero Inc.), software house (Innohub Inc.) which cater software solutions in a mortgage company in USA. Currently I am maintaining/managing an online payslip application which I created from scratch and deployed last Jan 2015 for a payroll company in Cavite, Philippines as a freelance work. If you feel I am a good fit in your current or upcoming project. I am always available and very much willing to be one of your hired freelancers. Cheers! Email: Skype: jamjam_04

$15.00 /hr
148 hours

Creole Studios

Creole Studios Agency Contractor

A software design & development studio.

India - Portfolio: 12

We are a software design & development studio based in Gujarat. We're obsessed about creating remarkably stunning & ingenious mobile apps, websites & web apps. Ever since we were in college, we wanted to set up a software studio. We weren't happy with the current software solution providers. Our ma & pa taught us that the purpose of one's professional life should be to solve a problem that is existing in the world. So, we set up our software development studio with an aim to make amazing mobile apps and cool websites. The process of developing web apps and mobile apps doesn't have to be so morbid and mundane. It is a creative process and, if done correctly, it is absolute fun. Everyday we help our clients in their businesses and in their day-to-day lifestyle by building products that they love to use.

Associated with: Creole Studios

85% Job Success
$16.00 /hr
0 hours

Manali D.

Manali D. Agency Contractor

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 2009. Earned CMMI Level 3 recently. It is a software development company located at Gujarat, India. We have nearly 110+ 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.

Associated with: Array Infotech Pvt. Ltd

50% Job Success
$4.00 /hr
0 hours

Farrukh Naseem

Farrukh Naseem Agency Contractor

Kaya Systems Pvt Ltd - Your Web Department @ Work!

Pakistan - Portfolio: 3

I am highly professional developer and marketing automation expert using InfusionSoft, CustomerHub, ClickFunnel, LeadPages, Memberium, iMember360 and have done extensive InfusionSoft API programming to integrate IS with all Major CMS and E-Commerce platforms.

Associated with: Farrukh Naseem

79% Job Success
$50.00 /hr
0 hours

Scott Wynn

Scott Wynn

Expert Coldfusion and Hubspot Integration Developer

United States

Offering web development and consulting services in USA English from the Midwest. 15 years experience in Coldfusion and SQL servers and programming languages. Internet and Intranet development, CRM integration, API integration, Hubspot, data migration, custom one-of-a-kind applications and procedures. Competitive pricing, video conferencing consultations and no language barrier to USA English. Let's begin!

$29.00 /hr
37 hours

Santiago Y.

Santiago Y.

Web Developer (PHP+RoR+AS3)

Argentina - Tests: 1 - Portfolio: 4

Over the last 9 years, I have been developer of a wide range of websites using Ruby on Rails, PHP, Action Script 3 and other tools including differents kinds of objectives like sites, web applications, games, backends interactives in a team with severals agencies and small companies. I have experience in e-commerce sites, payment modules integrations, developments of modules for open source tools like Prestashop, YII framework , Ruby on Rails, jQuery, also in creation of customized back-ends for special asks and design and development interactives like games, presentations and mobil applications.

$27.78 /hr
0 hours