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.

377

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.

4.66
Last updated: May 1, 2015
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  1. Jonathan C.

    Jonathan C.

    Consultant

    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
    2,384 hours
    4.96
  2. Antoan M.

    Antoan M.

    Full stack IT, CTO level Startups consulting

    Bulgaria - Last active: 1 day 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

    $70.00 /hr
    1,559 hours
    5.00
  3. 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
  4. William Souza

    William Souza

    Java Expert (top 1% Advanced Java)!

    United States - Last active: 10 hours 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
    750 hours
    4.37
  5. 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
    5.00
  6. Aurelien Herve

    Aurelien Herve

    CTO Expert DevOps, Big Data & Architect

    France - Last active: 2 months 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
    5.00
  7. Vladimir S.

    Vladimir S.

    Trading strategies (Ninja Trader), Betfair API and more

    Bulgaria - Last active: 1 month ago - Tests: 2 - Portfolio: 1

    I am a communications and software engineer with 10+ years of experience I have strong experience in the quntitative programming usually writing trading strategies for NinjaTrader7. Also have strong experience with the Betfair betting exchange API. Usually programming in Java and C# High Level of math knowledge - graduated the Sofia High School Of Mathematics, A+. Strong data base skills. During the last five years I have specialized in trading bots and strategies(NinjaTrader), betting bots (using the Betfair API) and also automated betting engines which are simulating human activity in the bookmakers websites. Strong experience with data scraping/web scraping and data processing. I can tell you a lot of things about me and my experience but will be boring. If you are interested in working together I will share any info about me and my finished projects and experience. Best wishes, Vladimir

    $33.33 /hr
    0 hours
    0.00
  8. Bon Franklin

    Enterprise Application Architect

    United States - Last active: 11/09/2013

    I am able to bridge business and technical concerns and achieve stable, performant and flexible solutions. I am used to developing very large systems integrating numerous unrelated aspects of an organization and am able to maintain the big picture vision while I'm down deep planning and writing code. Ultimately, my first job is solving problems. My second job is implementing the technical solution for that problem.

    $83.33 /hr
    0 hours
    0.00
  9. 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
    784 hours
    4.79