API Development Professionals & Consultants

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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, 377 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 4.66.

Last updated: May 1, 2015
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  1. Jonathan C.

    Jonathan C.


    United Kingdom - Last active: 3 days 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
    2,324 hours
  2. 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
  3. Aurelien Herve

    Aurelien Herve

    CTO Expert DevOps, Big Data & Architect

    France - Last active: 1 month ago - Tests: 3

    As a former startup CTO, I can help you to design a scalable, reliable, evolutive and documented architecture to help you starting your project. I strongly believe an infrastructure should deploy in one click with no worries, and I can help you to achieve this with high-end and cutting edge technologies. For this I can help you to setup efficient lean startup methods, agile development, continuous integration, continuous deployment, Test Driven Development, REST api design, proper algorithm design, automated documentation generation…etc I am currently speaking and developing fluently with: ruby, rails, grape-api, mongodb, redis, mysql/postgresql, amazon-dynamodb, neo4j, redshift heroku, amazon aws, capistrano travis, codeship, github hadoop, hive, redshift Feel free to contact me if you are looking for strong technical foundation to start a project, design a complex web app, setup an high-end cloud environment, design a robust and secure api, or simply if you want to learn a few keys to make everything going smoothly ! It’ll be a pleasure to meet you ! contact See my website for more about me ! http://aurelien-herve.com

    $110.00 /hr
    79 hours
  4. James R.

    James R.

    Bitcoin, Data, Science and Crawlers Too.

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

    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. 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, SQL Machine Learning: Network Graph Analysis NLP Classification Basic Regression Analysis Basic Django Essential Rest API Design Quick fix PHP, Javascript, HTML, CSS

    $35.00 /hr
    8 hours
  5. Dan A.

    Dan A.

    Database developer

    United States - Last active: 1 day 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
    765 hours
  6. Dmitry Timofeev

    Dmitry Timofeev

    Analyst, software developer

    Ukraine - Last active: 1 month ago - Tests: 5 - Portfolio: 2

    I'm analyst, R and python programmer. Good understanding of OOP model, SQL and noSQL databases. I know how to gather requirements and write tasks for developers after it, how to manage development process and make technical docs about products. I have experience working with different API. Familiar with the methods of development API. Created some API, including API for mobile applications. With databases prefer to work at the level of ORM: Django ORM and SQLAlchemy. I work with MySQL, MongoDB. I'm familiar with Flask. I work with cloud services: Amazon EC2 and Google App Engine. I can create and deploy python-based applications to amazon and app engine. Familiar with HTML. I have experience in *NIX-server (Linux, BSD, OS X) administration. It is easy for me to get on any new things in web development, new technologies and knowledges (note: I learn offline). My specialisation is API and backends developing, data analyse and requirements analysis.

    $15.00 /hr
    307 hours
  7. Muhammad A.

    Muhammad A. Agency Contractor

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

    Pakistan - Last active: 20 hours ago - Tests: 2 - Portfolio: 2

    I have designed and developed a wide range of web based business applications. My main expertise are in Salesforce Development and Customization. I am working as a salesforce Developer, Administrator and Consultant from last 5 years. My major expertise are in the following areas of salesforce development:- Customization of Salesforce CRM, Apex Programming (apex classes, triggers, web services), visualforce pages, salesforce API, javascript and Ajax toolkit. I have created and implemented custom applications, page & search layouts, related lists, custom tabs, validation rules, workflow rules, sharing and accessibility rules, outbound/inbound messages, email templates, management and customization of salesforce standard objects and custom objects, create new user accounts and configure Salesforce to fit security needs at the user and organization levels, Custom and standard report creation, customization of dashboard and presentation of data with graphical elements, Data migration and manipulation using Salesforce tools, Unit tests code coverage and deployment, Integration of other applications using salesforce API, Customer Portals customization and Force.com sites development.

    Associated with: S3Technology

    $15.00 /hr
    720 hours