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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.

332

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: September 1, 2015
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  1. Vladimir S.

    Vladimir S.

    Trading strategies (Ninja Trader), Betfair API and more

    Bulgaria - 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
  2. 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 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
    89 hours
    5.00
  3. Jonathan C.

    Jonathan C.

    Consultant

    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
    4.96
  4. 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
    4.99
  5. 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
    1,048 hours
    4.79
  6. 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
    4.83
  7. 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
    4.99
  8. William Souza

    William Souza

    Java Expert (top 1% Advanced Java)!

    United States - 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
  9. Harsha Srinivas

    Harsha Srinivas

    Software Developer and System Administrator at Delta Force

    India - Tests: 5 - Portfolio: 3

    Hi, I'm Harsha. I'm a software developer and a system administrator with 2+ years experience. I'm hard-working and very much determined. This helps me finishing any project in the best possible manner. Website : http://harshasrinivas.github.io I have a lot of experience in solving algorithmic challenges. I am also an active contributor to open-source. I am basically a computer geek who can work for many hours straight to get a job done. Programming Skills: ● Languages : C, C++, Python, Java, JavaScript ● Other : Algorithms, Data Structures, OOP, JSON parsing ● Web Technologies : Git, Github API, Facebook Graph API ● OS : Linux and Windows ● System Administration : Apache, Nginx Web servers Github : https://github.com/harshasrinivas LinkedIn : https://in.linkedin.com/in/harshasrinivas Codechef : https://www.codechef.com/users/moderator

    $16.67 /hr
    0 hours
    0.00