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

337

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: August 1, 2015
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  1. James R.

    James R.

    Bitcoin, Data, Science and Crawlers Too.

    United States - Last active: 4 days ago - Tests: 1 - Portfolio: 3

    Hi, I am well versed in most of the Python science, numerical and machine learning stacks and a Bitcoin enthusiast since 2012. I have worked on projects such as automated market making and trading bots for Bitcoin exchanges, sports game forecasting, website automation for clients, and multiple social and academic network studies. I also work in Golang for backend services for websites. All software engineering work will need external contracts to identify intellectual property given to client. Generally I only work on open source software to maintain the right to work in the same or similar domains as the work awarded using libraries I create. The client reserves the right to systems created from the libraries. In the long run this shortens development time for everyone and allows future work for myself. My Github Pages github.com/jcrubino github.com/TheOpenedSource github.com/BitTrade Keywords: Golang, Python, Bitcoin, Apis, Crawlers, Scipy, Numpy, SciKits Custom Crawling & ETL: libxml & webdriver Custom Distributed Tasking AWS: EC2 S3, Route 53 NoSQL: MongoDb, Neo4j Machine Learning: Network Graph Analysis NLP Classification Basic Regression Analysis Basic Django Essential Rest API Design Quick fix PHP, Javascript, HTML, CSS

    $100.00 /hr
    46 hours
    5.00
  2. Jonathan C.

    Jonathan C.

    Consultant

    United Kingdom - Last active: 1 day ago - Tests: 1

    I have a UK university PhD, in Artificial Intelligence, and the business management skills to match, together With 15 years of Delphi, C++, Java, SQL, and Object-oriented analysis and design experience. I specialise in development including protocol specification, thread management, distributed communication and database transaction management. I have retro-fitted software in tasks ranging from installing improved modules to sophisticated Artificial Intelligence sub-systems. I can provide the often essential empathy with the contract holders, and the pragmatics to satisfy the demands of management. I have 20 years of competency in the software industry, and have a proven track record that will guarantee the successful realisation of your system requirements. I have designed and implemented systems used by multi-billion turnover corporations around the world, saving millions of pounds savings per year. My scope in system design and development ranges from individual utilities and embedded operating systems, through to large-scale corporation-wide distributed architectures. I am also able to provide a code debugging and fixing service, either onsite or online. I can give workshops and can facilitate training of new software developers, both in-house and online. I have managed my own team and maintained their skills matrices, ensuring training has been current. I have defined and managed new product releases and have written instruction manuals for new and "super" users at the customer end of the project.

    $105.56 /hr
    2,660 hours
    4.96
  3. William Souza

    William Souza

    Java Expert (top 1% Advanced Java)!

    United States - Last active: 2 months ago - Tests: 6 - Portfolio: 1

    I love challenges and low-level programming that involves the creation of API's, system's core, math, advanced algorithms, code optimization, artificial intelligence, bits & bytes, debugging other people's code (even without documentation) and everything that involves lots of thinking. I am a hardcore programmer and I code for fun at my free time to keep in touch with new techonologies :) My core experience in the last years is Java (I started with Java since the 1.1 version! pre-swing and with Microsoft Java SDK!), but I've already programmed in a huge variety of languages, like: ASM, PHP, C/C++, C#, VB, SQL, Lua, , etc. I speak "computer", so if you have a bug and you don't have proper documentation, don't worry, I will fix it!

    $77.77 /hr
    752 hours
    4.37
  4. Josef Nalezny

    Josef Nalezny

    php, python, xml, web scraping, datamining, csv

    Czech Republic - Last active: 2 days ago - Portfolio: 2

    My aim here on Elance is to provide the best service when data extraction and data mining is needed from an employer. I specialize in automated data extraction, processing and mining. Writing computer software is something I´ve been doing for over 10 years in languages ranging from PHP, XML to Python, which has gave me an extensive experience with computers, internet, programming and coding. For the last two years, I’ve being more focused on Web Scraping, Data Mining, Bypass captcha codes, PHP, CSV, XML, API Development, Data entry, Python and Data Extraction. If you are looking to boost your business/company with a mix of creativity and functionality, I’m your guy!

    $15.00 /hr
    22 hours
    4.99
  5. Antoan M.

    Antoan M.

    Full-stack Software Arhictect / CTO

    Bulgaria - Last active: 9 days ago - Tests: 13 - Portfolio: 5

    I have a PhD in Computer Science with 20 years of experience. I am architect and builder of a Enterprise Grade Platforms, that are designed using proven technologies, that ensures the platform will scale along with customer's business needs. It is the same technologies that are in use today in mission critical systems at companies such as Google, Facebook, Yahoo!.

    Groups: LoginRadius

    $111.11 /hr
    1,651 hours
    4.99
  6. Dan A.

    Dan A.

    Database developer

    United States - Last active: 5 days ago - Tests: 8

    My name is Dan Andersson, I am a SQL Server expert, I have 20 years experience architecting and optimizing SQL Server databases, SSIS packages, SSRS reports and SSAS cubes. I would add a lot of value to any organization that is in need of a skilled SQL Server professional. I am also a certified (MCAD) developer, with many years experience of developing web and windows applications in Microsoft environments (ASP/ASP.NET/C#). I have extensive experience with development through the entire development life cycle (Classic ASP/ASP.NET SQL Server 6.5/7/2000/2005/2008), and I am a good communicator and have written many requirements specifications.

    $30.00 /hr
    931 hours
    4.79
  7. Rohit S

    Rohit S

    PHP, Wordpress, Zend, Facebook, MVC, API's Expert

    India - Last active: 14 days ago - Portfolio: 7

    I am a Professional PHP Programmer with 6+ years of expert level experience. I am very much happy to support my clients, quality and fun loving. Expert in Wordpress, Joomla, Drupal, CakePHP, Codeigniter, Magento, HTML5, CSS3, Nodejs, API's I am also support with Data entry, Product entry, Research, Webscrape, Data collection.

    $20.00 /hr
    139 hours
    4.20
  8. Muhammad A.

    Muhammad A. Agency Contractor

    Salesforce.com (5+ years) Certified Advanced Developer (501 and 201)

    Pakistan - Last active: 5 days ago - 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 Salesforce.com 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 - Force.com 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 Salesforce.com - 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
    5.00
  9. Mohan Krishna

    Mohan Krishna

    Expert API Based Web App Developer

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

    We might be new to Odesk but we are in the field of freelancing for the past 3 years.We bid only on projects which we are 110% sure of completing and when we are more than happy to give cent percent. We mainly deal with API based Applications and we are experienced in Facebook, YouTube,Twitter, Chrome Extensions, Wikipedia, Google ,Dropbox and on many more Platforms with API.

    $15.00 /hr
    12 hours
    5.00
  10. Aliaksei T.

    Aliaksei T. Agency Contractor

    Web Programming, Data Mining, Analytics

    Lithuania - Last active: 10/21/2013 - Tests: 1 - Portfolio: 2

    Expertise in web development, data mining, and statistical analysis with more than a decade of experience in the industry. We did data analysis for a number of researches that were covered by major news agencies and blogs like TechCrunch, The Huffington Post, Wired, Daily Mail, etc. Worked closely with reporters to get coverage. Developing responsive websites and interactive web applications for companies and startups. Technologies: PHP, Wordpress, Javascript, jQuery, MySQL, Node.js

    Associated with: UAB IVL

    $45.00 /hr
    548 hours
    5.00