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

341

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: July 1, 2015
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  1. Niels Ganser

    Niels Ganser

    German Engineered Ruby on Rails Solutions & Reliable Project Managment

    Germany - Last active: 8 days ago - Tests: 7 - Portfolio: 3

    Hi, I'm Niels, a seasoned software engineer based in Germany mostly working on web applications of all kinds using Ruby on Rails (3 and 4), (My)SQL, mongodb, redis, HTML(5), CSS and JavaScript in an agile manner. I also set up and maintain Linux servers. Several applications that I architected, implemented and maintain are in active production use. Please see my portfolio for details. I have years of experience as a senior developer – working solo, in co-located teams as well as in distributed teams – and hold a postgraduate diploma in Management of Software Projects. My greatest prides are proactiveness, reliability and good communication Please note that I do *not* do graphic design. Not for a lack of interest, but for an unfortunate lack of artistic talent. Sorry! :)

    Groups: Engine Yard Ruby on Rails Professionals Network

    $128.50 /hr
    5,375 hours
    4.97
  2. Aldrin L.

    Aldrin L.

    Architect, Backend Engineer (Scala, Java, Hadoop)

    Brazil - Last active: 8 days ago - Tests: 12 - Portfolio: 1

    Over the past 15 years I've worked with projects ranging from Startups to Fortune 100s. From C++ to Scala, past assignments involved: - Protocol Design in C++/Delphi - Java API Publishing - Maven Plugin Development - Distributed Systems using RESTful backends - Scala / Akka Design - Jenkins Plugins Writing On a daily basis, I spend between Systems Architecture, Build Planning, for Hadoop and Restful Backends, specially under Amazon Web Services. Oh, I'm also a Cloudera Certified Administrator and Developer. Favorite platforms include Scala, Python and General Java. See my full profile for more descriptions and feel free to browse my github and bitbucket profiles at the addresses below: http://github.com/ingenieux http://bitbucket.org/aldrinleal Favourite customers involve pragmatic teams, with contant online presence, and direct involvement with the end customer, and a problem involving legacy and the next generation Feel free to discuss our next project - I'm always looking for the next challenge!

    Groups: LoginRadius, Microsoft Certified Professionals

    $55.56 /hr
    3,112 hours
    4.82
  3. Eugene Naydenov

    Eugene Naydenov

    Expert Python and JavaScript Engineer

    Ukraine - Last active: 12 days ago - Tests: 10 - Portfolio: 4

    Expert programmer, Scrum master, team leader. Looking for long term project on position of Senior/Lead software engineer. Preferred technologies: Python and JavaScript. I have over 5 years of experience in Python, Ruby, PHP, JavaScript, C/C++, C# and .NET (Windows Forms, WPF, WCF, ASP .NET), Java development. I also have a wide experience in the following areas: AJAX, SPA, SQL, OOP and OOD. I have skills of working with NoSQL and SQL-based databases such as MongoDB, Redis, MySQL, MS SQL Server, Oracle, FireBird, PostgreSQL, etc. Have good experience of writing the Node.js applications. Proficient in working with cloud solutions such as AWS. Past 3 years I've been working primary in a web-development area on position of lead software engineer with responsibilities of * Project and team management * Web application development * Testing of web application and its components * Reliability, security and performance of the server and the application You can find my CV in this document: https://docs.google.com/document/d/1lYhvx_Ugo1YPPquT8gTHqDx0ebxYZYOZ-GEQX8Nyepw/edit?usp=sharing

    $45.00 /hr
    6,703 hours
    4.98
  4. Leo J.

    Leo J.

    Engineer in Computer Science - Developer - Research

    France - Last active: 1 day ago - Tests: 15 - Portfolio: 1

    Hello, I am a 27 years old engineer in Computer Science from France. After graduating from the Institut National des Sciences Appliquées of Rennes, I moved over to Sweden to follow a master program on Mobile Systems. Meanwhile, I was also working as a freelance web-developer/project co-leader for a Canadian company. While learning, I participated as a trainee to many professional project and learn to be flexible both in my ways of working in a team and on the technologies to use. Indeed, even so my major programming languages are Java and PHP, I could easily learn C# during my master thesis in Sweden and build up a nice piece of software to work with Sifteo cubes. Software architecture and system design are two of my strong background points, thus I thrive in realizing project from the beginning until the end. My professional experiences involved many non programmer and non computer scientist customers and allowed me to train establishing their needs and to translate them into sprints, backlog and deadlines. I also believe that knowledge in computer science without knowledge of the real world are wasted hence my interests for books, sail, roller-skating, ice hockey as well as environmental questions for instance. Looking forward to working with you.

    Groups: Application Developers Alliance

    $33.00 /hr
    434 hours
    4.96
  5. Alexander Miloradov

    Alexander Miloradov

    ASP.NET and C# Senior developer / Architect

    Russia - Last active: 1 day ago - Tests: 11 - Portfolio: 13

    ● More than 10 years of experience on the .NET stack. ASP.NET MVC sites (frontend and backend), desktop applications, any tasks using the best ways to solve. ● Use the best practices for building a correct and extensible architecture and high-quality code. Patterns, unit testing, any source control systems, team working. ● Always in touch, reliable, self-motivated and goal oriented. Provide steady work progress with maximum productivity of each hour of work.

    $44.44 /hr
    3,640 hours
    4.77
  6. Topher L.

    Topher L.

    Specializing in Server Administration, Configuration, and Deployment

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

    I have been in the telecommunications industry for over 13 years and have worked as a consultant to major Fortune 500 companies in the past for both business and technology needs. I have a vast knowledge of anything that relates to the internet, both hardware and software realms and have worked on a variety of projects ranging from the simple to large scale transition ones spanning months at a time. I understand a business' need to get projects done right the first time and have always exceeded my clients goals. If they're not happy, I'm not happy. I have a dual bachelors degree from the University of Colorado at Denver in Business Information Technologies and Business Management. My Masters in Business Administration is in International Business and most IT skills I have picked up on my own or through various courses either online or at the local community college. I look forward to working with you and completing any projects you may have, from the quick fix to an entire server farm rebuild. I am also a word class back end programmer familiar with MySQL, Bash, PHP, Perl, and Python. Please, no front end design work, I don't have an eye for creativity (unless it's something simple of course). I look forward to working with you and any projects you may have for me.

    $39.00 /hr
    417 hours
    4.98
  7. Oleg Batishchev

    Oleg Batishchev

    Magento Jedi / Senior Web Developer / Consultant

    Russia - Last active: 3 days ago - Tests: 6 - Portfolio: 9

    Hello dear customer, Yes, I'm not wrong, cause after read that you will wanna to hire me ;) Well, now seriously ... I am a highly experienced web developer who has primary direction of activities in e-Commerce web-developing, in that case it's a Magento area. I'am an adept of Magento and if you don't know what is it and you wanna e-commerce site you have to contact with and I will explain how is Magento awesome. I have 3 years experience in Magento and 9 years total in PHP developing with an MVC, different CMS (Wordpress), frameworks (Yii, Zend) and other. I always stick to the coding standards and follow the best practices to provide seamless, readable and reliable code. Besides developing I have some administration skills to manage servers, automate routines and can improve performance of Magento backend and frontend as well. Also I can setup the server from a scratch. I prefer a stack for Magento consists of: Nginx, Php-Fpm, Redis, Apc, Mysql 5.5 (5.6) (Percona better), SOLR/Lucene/Sphinx. I prefer do not install any control panels but if required I would prefer ISP Manager 5 Lite. Magento related Experience and Services - Optimization, load improvements, speed up - Extension development and customization - Troubleshooting - Tweaks & tricks - Bulk importing. Do you have 100k products? It's not a problem - Store migration - AWS, Rackspace building an architecture of you infrastructure - Core upgrade - Magento recurring support - Bug/error fixing - Theme design and customization - Consultation - Code review I also have some basic skills in the desktop programming (C#) and some Photoshop skills. I'll be glad to new acquaintances and long-term cooperation. I have a team of developers and every day we are expanding. Just hard to write all things what I can do. I am easy learnable for new stuff (frameworks, custom systems, foreign code). My strong side is a backend developing and have a good knowledge of a frontend side: - HTML5/CSS3 - Bootstrap - jQuery - Ajax - WebSockets, Long polling - Prototype - ExtJS - Google API, Yandex API - many other things that I can't remember at this moment. Also in a less degree Angular, Backbone and other frameworks/libs. Communication Channel : Skype/Whatsapp/Email/Phone I have listed only a little part of my portfolio cause I have many jobs completed and I can't add every job to profile.

    $45.00 /hr
    1,164 hours
    4.98
  8. Sergey M.

    Sergey M.

    Software Engineer | Master's Degree in Computer Science (MSCS)

    Belarus - Last active: 1 day ago - Tests: 9 - Portfolio: 4

    Highly skilled Software Engineer with 5+ years of experience in developing application for customers from different parts of the world. I am an expert in API implementation. And I am familiar with wide range of technologies mainly focused on .Net C# desktop and Web applications. My strong analytical skills combining with real practical experience allow me to provide you perfect solutions in reasonable period of time.

    Groups: Application Developers Alliance, ebay...

    $33.33 /hr
    878 hours
    4.97
  9. Dmitry Artamoshkin

    Dmitry Artamoshkin

    Browser extensions expert (Chrome extension, Firefox addon)

    Russia - Last active: 1 day ago - Tests: 6 - Portfolio: 7

    Current areas of interest: Browser extensions, plugins, bookmarklets and etc. Developed dozens browser extensions for Chrome and Firefox browsers for clients and for personal use. I've gained rich experience in Ebay API, Google Drive API, VK API, online dictionaries, html5 video and a lot of other APIs and technologies. And I'm always ready to master something new. Page modifications, script injections, toolbars, popups, mashups, API integration, user action automation - that's my job and I really like it! Also I have strong web-development background and I have got rich experience in: - Perl, PHP, HTML, CSS, Javascript, jQuery, AJAX, MySQL - Yii, Wordpress, Joomla - Adobe Photoshop, Adobe Illustrator. Master's Degree in Computer Science. Have 7+ years of experience in IT Industry. I'm looking for the opportunity to utilize my varied skills in full-time or part-time work.

    $35.00 /hr
    730 hours
    5.00
  10. Marcin K.

    Marcin K.

    Senior Software Engineer / Python / iOS

    United Kingdom - Last active: 2 days ago - Tests: 2

    I run a tech consultancy and I'm working from Bali, Indonesia (UTC +8). I use Python and Django for backend and APIs, Objective-C for native iPhone apps, Vagrant for setting up dev environments. I also have some experience with front-end (JS, HTML, CSS, Bootstrap) and data analysis/machine learning. I’m a quick study problem solver, I do what’s necessary to accomplish tasks. 8+ years commercial experience in tech as a developer, ux and graphic designer. Summary: - Python, Django, Flask, Tornado, Django-Rest-Framework, SQLAlchemy, py-test, factoryboy - iOS 7, Objective-C, ReactiveCocoa, AFNetworking, RestKit, CocoaPods - HTML, CSS, Bootstrap, JS (jQuery, Backbone) - LAMP, Heroku, AWS, MySQL, PosgreSQL, Redis - architecture, design patterns, best practices - git, mercurial, svn - continuous integration - lean, agile

    $38.89 /hr
    910 hours
    5.00