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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, 334 API Development projects are completed every quarter on Upwork.

334

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.

4.65
Last updated: July 1, 2015
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  1. Sugandha Ralhan

    Sugandha Ralhan

    Senior .Net/Java developer and Software Testing Lead

    India - Last active: 1 day ago - Tests: 2 - Portfolio: 2

    I am a 10 year experienced developer(.Net,Java/J2EE). Have very good hand in .Net,Java technologies - ASP .Net, MVC, Web API, SQL Server, Desktop applications,jsp,Sprints,Struts etc. Have worked in Infosys for 1 year and then worked as Team Lead /Manager for a Team of 14 resources.

    $22.22 /hr
    1,380 hours
    5.00
  2. Trevor Daniel

    Trevor Daniel

    28 years of software development experience.

    United Kingdom - Last active: 2 days ago - Portfolio: 1

    I am a full-time Elance software developer with 28 years experience. I specialise in developing and using APIs and building custom tools that move data between them.

    $55.00 /hr
    1,118 hours
    4.97
  3. Peter B.

    Peter B.

    Cloud Technologist: AWS & NetSuite Expert

    United States - Last active: 3 months ago - Tests: 3 - Portfolio: 1

    I have been in software development, networking and technical management for over 18 years. I can implement your AWS Auto Scaling fleet, build and host an API integrating your existing web services with NetSuite, and build you a custom solution to your biggest technology challenges. I worked for Amazon Web Services for more than 2 years as a Software Development Manager for EC2, and interacted with teams working on S3, SNS, RDS, SQS, ElastiCache, EBS, CloudFront, DirectConnect, EC2 VPC, Route 53 and more. I have worked with and still interact with the people that make AWS tick and grow. You can trust me to bring my first hand knowledge of the inner workings of AWS to help your business succeed. I've spent several years building and customizing NetSuite. I've gone deep with Javascript and the nsAPI calls in SuiteScript. I've integrated external systems and APIs into NetSuite, optimizing workflows and saving employee time and overhead. I look forward to learning about you, your business, and what projects you are working on to help build your success.

    $175.00 /hr
    0 hours
    5.00
  4. Alex Efros

    Alex Efros

    Perl Developer, Systems Architect, Linux Admin

    Ukraine - Last active: 01/22/2014 - Tests: 9 - Portfolio: 15

    Experienced in developing distributed systems, network services and backends for websites in Perl. I can develop complete website solution from Linux server installation and administration to complex modern web-interface in JavaScript (except graphical design). I'm developing software since 1989. I work as Perl/Web Developer since 1997. Development priorities: code simplicity and clarity, reliability, security, efficiency. I've experience with Apache and Nginx web servers, MySQL and NoSQL databases, Mojolicious and Backbone.js frameworks, Perl/HTML/JavaScript/CSS, FastCGI, non-blocking I/O, event-oriented and concurrent programming, complex parsing (fetching, parsing and processing complex data from thousands pages on hundreds websites every minute), service-oriented architecture, distributed computing, developing Perl modules, automated testing, … I work as Linux admin since 1994. Experienced in developing own Linux distribution from scratch (2001-2004). I've strong focus on security and since 2004 use Hardened Gentoo Linux. Experienced in developing large systems (50000+ man/hours) as Systems Architect and Senior Developer. Experienced Team Leader and Manager for small team (about 10 developers/testers). Also I'm author of many articles (mostly in Russian) and have small experience (about 6 months) as Top Manager in software company (about 200 employee). Since 2001 I'm working as full-time freelancer. I never agree to work which must be done quickly in exchange for quality. I like to do things in the Right Way and prefer simplicity and minimalism. I'm interested in tasks which should be implemented using OS Inferno and language Limbo (which usually mean distributed and/or highly concurrent systems). I'm looking for long-term business relationships with customers. More details (a lot of my open source software, perl modules, articles, links to LinkedIn/GitHub/etc. profiles) available on my website: http://powerman.name/

    $30.00 /hr
    0 hours
    5.00
  5. Azmat Masih

    Azmat Masih

    Azmat Masih

    United States - Last active: 09/28/2014 - Tests: 1 - Portfolio: 1

    I am a strong team player, highly motivated, work very well under pressure required to meet the tightest of deadlines. And highly organized, have excellent communication, time management and organizational skills. I am adaptable, conscientious and enthusiastic keenly interested in exploring all latest technologies with can do attitude. Expertise: ======= SQL Server 2005-2008 ASP.Net C#.Net Entity Framwork Crystal Reports LINQ WPF MVVM XML API Development Paypal Integration Visual Basic 6.0 Telerik Log4Net AJAX HTML/XHTML Microsoft SQL SSRS

    $11.11 /hr
    124 hours
    0.00
  6. Miguel Diaz

    Miguel Diaz

    Chrome/Firefox Extensions, Web Scraping, jQuery, PHP, MySQL,API Expert

    Peru - Last active: 8 hours ago - Tests: 2 - Portfolio: 33

    Over 8 years of experience in web development, I've acquired some good knowledge in a variety of technologies from Linux to jQuery. Recently I've been developing Chrome/Firefox Extensions and Web Scraping Systems, I also have hands-on experience on Third-party API integration. My programming style is clean and straight-forward, with equal emphasis on quality, functionality and maintainability. Here's a summary of the technologies I've been involved with: /Chrome and Firefox extensions |-- Content injection |-- Toolbars |-- Sidebars |-- Tooltips |-- DOM manipulation |-- API requests |-- 'New tab' page overwrite |-- LocalStorage /Web scraping |-- Multi-threaded scraper |-- Proxy switching |-- Javascript-based sites |-- Password/SSL protected sites |-- Image scraping |-- Ad scraping |-- Feed scraping |-- Email extraction |-- Regexp |-- Deliverables in csv, tsv, xml, json, excel, mysql, txt /API Integration |-- Google Maps |-- Google Streetview |-- Google Custom Search |-- Facebook API |-- LinkedIn API |-- PayPal API |-- Maxmind.com (IP Geolocation tools) |-- Clickatell.com (Bulk SMS Gateway) |-- Oneall.com (Social Login) |-- Octeth.com (Email Marketing Software) |-- Adstation.com (Advertising Software) |-- Ekosolutions.us (Mobile marketing and micropayments) |-- Infofax.es (Internet Faxing) |-- Prosperent.com (Affiliate tools) |-- Superfish.com (Visual Search) |-- Wurfl.sourceforge.net (Mobile Useragent Database) |-- Talentbin.com (Talent Search Engine) |-- AWeber.com (Opt-In Email Marketing) |-- Thumbalizr.com (Online thumbnail generator) |-- Fnac.es (Product Catalog) |-- Serhstourism.com (Hotel Search Engine) /PHP |-- CodeIgniter Framework |-- Symfony Framework |-- MeekroDB |-- Xdebug |-- Web services |-- PHPUnit |-- Exception Handling |-- cURL |-- PHPMailer |-- phpDocumentor |-- Memcache |-- ZB Block /Javascript |-- jQuery |-- jQuery UI |-- jQuery Grid |-- jQuery Dump |-- jQuery slimScroll |-- MooTools |-- YUI |-- jSEND |-- qTip2 |-- Conditional compilation |-- DOM manipulation |-- Namespaces |-- Ajax /Linux |-- Apache |-- htaccess |-- Shell scripting |-- Rsyc/SSH |-- Cron jobs |-- Procmail |-- Memcached |-- GNU gettext |-- FFmpeg |-- yum/apt-get |-- Virtual hosts |-- Plesk/cPanel /MySQL |-- Transactions |-- Large databases (~5M rows) |-- Data replication |-- Fine tuning |-- Backups /SEO and Internet Marketing |-- Adsense for Search |-- AdSense for Content |-- Advertising Metrics |-- XML sitemap/videositemap generator |-- Google/Bing Webmaster Tools |-- Long Tail Keywords optimization |-- SEO-friendly URLs |-- HTML Optimization /Project Management Tools |-- Git/GitHub |-- SVN |-- Trac |-- Pivotal Tracker |-- Basecamp |-- Atlassian |-- Balsamiq Mockups /Other |-- C/C++ |-- Java |-- ASP |-- Prolog |-- Visual Basic

    $35.00 /hr
    2,533 hours
    4.99
  7. Wallace Ferreira

    Wallace Ferreira

    Software Analyst/Developer

    Brazil - Last active: 1 day ago - Tests: 10 - Portfolio: 2

    Hello, my name is Wallace. I've been working with software development for over 9 years. I acquired a lot of experience developing applications using Visual Basic, C/C++, PHP and Java. My expertise is analyzing and developing Desktop and Web Applications such as: + Crawlers/Web Crawlers - Collecting and storing data from sites, documents, videos, photos, social media sites, classified ads sites, etc. + Web Data Scrappers - Extracting, parsing, filtering and storing relevant data from web pages to readable and manageable formats like Excel, CSV, HTML, etc. + Bots and Automation scripts - Extracting and making business decisions out of data from documents like PDFs, Excel, CSV, XML, TXT, etc. - Sending email reports automatically - Auto filling forms - Price comparison apps - Event notifiers + Data conversion/transformation - Transforming/Converting data between formats for import/export in different applications. - Feed generation - Report construction + API development/integration - Adding support for third parts services - Creating interfaces for communication between systems. I have developed dozens of applications for a wide range of application domains including: - E-Commerce sites (like Amazon.com, Walmart.com, ToysRus.com, etc) - Financial market - Market research groups - Medical related groups - Shipping companies - And several other personal applications. Some formats I have expertise in are: - JSON - XML - SQL - CSV - PDF - TXT - HTML - XSL - XSLX - And others Acting as an analyst and developer, I gained experience with modeling relational databases and SQL, with a focus on MySQL DBMS. Since 2009, I have been working for a company that develops software for the financial market - EconoInfo (http://www.econoinfo.com.br). In 2012, I graduated in Computer Science at the Pontifical Catholic University of Minas Gerais - PUC Minas. Over the past four years, I specialized in Java development, especially Java EE 6.0, focusing on technologies EJB, JPA, JSF, JMS and JCR. Acting as an analyst and developer, I gained experience with modeling relational databases and SQL, with a focus on MySQL DBMS. As a developer in charge of creating the EconoInfo website's interface, I also specialized in Servlets, HTML, JavaScript and CSS.

    $27.78 /hr
    961 hours
    4.95
  8. Chris H.

    Chris H.

    Web Developer (ASP.NET | MVC | AngularJS)

    United Kingdom - Last active: 2 days ago - Tests: 6 - Portfolio: 6

    Microsoft Certified Solutions Developer with over three years’ programming experience using .NET framework to deliver web and desktop applications. I’m a passionate C# developer with extensive knowledge and experience with: - ASP.NET back and frontend development, including WebAPI 2, MVC 5 - Client side scripting, JavaScript, jQuerry, AngularJS, Knockout - Clean and SEO-Friendly HTML5 and CSS - Task automation using Poweshell scripting and C# applications Committed to designing up to spec, reliable and extendable solutions. Focused on delivering quality work on time and within budget. Always open for communication. Highly flexible, independent contractor that will get the job done for you.

    $20.00 /hr
    197 hours
    5.00
  9. Marcin K.

    Marcin K.

    Senior Software Engineer / Python / iOS

    United Kingdom - Last active: 6 days ago - Tests: 2

    I run a tech consultancy and I'm working from Bali, Indonesia (UTC +8). I use Python and Django for backend and APIs, Objective-C for native iPhone apps, Vagrant for setting up dev environments. I also have some experience with front-end (JS, HTML, CSS, Bootstrap) and data analysis/machine learning. I’m a quick study problem solver, I do what’s necessary to accomplish tasks. 8+ years commercial experience in tech as a developer, ux and graphic designer. Summary: - Python, Django, Flask, Tornado, Django-Rest-Framework, SQLAlchemy, py-test, factoryboy - iOS 7, Objective-C, ReactiveCocoa, AFNetworking, RestKit, CocoaPods - HTML, CSS, Bootstrap, JS (jQuery, Backbone) - LAMP, Heroku, AWS, MySQL, PosgreSQL, Redis - architecture, design patterns, best practices - git, mercurial, svn - continuous integration - lean, agile

    $38.89 /hr
    929 hours
    5.00