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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, 332 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 4.65.

Last updated: September 1, 2015
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  1. James R.

    James R.

    Bitcoin, Data, Science and Crawlers Too.

    United States - 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 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
    89 hours
  2. Jonathan C.

    Jonathan C.


    United Kingdom - 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
    2,766 hours
  3. Antoan M.

    Antoan M.

    Full-stack Software Arhictect / CTO

    Bulgaria - 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
    1,663 hours
  4. Dan A.

    Dan A.

    Database developer

    United States - 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
    1,042 hours
  5. David Kyalo

    David Kyalo

    Python, PHP & Javasctipt Expert.

    Kenya - Tests: 2 - Portfolio: 3

    Am specialized in development of feature-rich web applications using PHP or Python and robust frontends using various Javascript frameworks and libraries whenever possible. It's been 6+ years since joining this field. Over these years, I've worked on many projects with various clients and I keep loving every bit of it. Lately (the last 2 years), I have been involved in several Data Science related projects. This is a field I've come to love and I believe it holds a great future for the whole software industry. When creating applications, I not only care about meeting your requirements in time but I always make sure the code I write is clean and maintainable so that in future, other developers (if not me) will find it easy to work on. My Skill Set 1. Server Side Technologies -> Python - Flask or Django for web development. - Plain python + the many available tools and libraries for data science and general scripting. -> PHP: - Most proficient in Laravel for web applications. - WordPress for CMS based sites. - Also have some experience in Symfony, Codeigniter and Zend. 2. Databases (DBMSs) -> MySql or Postgresql in most cases. -> Graph databases (NoSQL) - Neo4j and OrientDB. Been working with them for the better part of this year. They hold the key to unlocking relationships in our data in ways RDBMSs are incapable. -> Document Databases (NoSQL) - I've used a little bit of MongoDb and CoachDb. 3. Frontend -> Javascrpt - Jquery - AngularJs -> HTML/CSS I Can't really call myself a web designer but my UIs never disappoint. In many cases, Twitter Bootstrap is involved.

    $28.00 /hr
    138 hours
  6. Josef Nalezny

    Josef Nalezny

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

    Czech Republic - 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
  7. Muhammad A.

    Muhammad A. Agency Contractor (5+ years) Certified Advanced Developer (501 and 201)

    Pakistan - 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 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 - 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 - 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
  8. Mohan Krishna

    Mohan Krishna

    Expert API Based Web App Developer

    India - 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
  9. Aliaksei T.

    Aliaksei T. Agency Contractor

    Web Programming, Data Mining, Analytics

    Lithuania - 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
  10. Aurelien Herve

    Aurelien Herve

    CTO Expert DevOps, Big Data & Architect

    France - Tests: 3 - Portfolio: 1

    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 !

    $110.00 /hr
    79 hours