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

334

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: July 1, 2015
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  1. Yuri V.

    Yuri V.

    Seasoned Full Stack Web App Crafter

    Ukraine - Last active: 8 days ago - Tests: 5 - Portfolio: 5

    I provide Web Architecture, Web Development and Consulting services to the early stage startups, entrepreneurs seeking a reilable tech person to create an MVP to validate their business ideas and established businesses looking for someone to help with ongoing tasks and further development of their products. This includes: - working out your requirements - application development & database design, API design and implementation - 3rd party APIs (Stripe, Twitter, Facebook, etc) integration - cloud (Rackspace, Amazon AWS, EC2, S3, SQS, SES, DigitalOcean, Vultr, Heroku) services & SaaS/PaaS integration - web server, database server configuration, load balancing and caching setup, security hardening, deployment automation, long running or heavy load tasks decoupling into background jobs - servers monitoring, app level stats gathering for further analysis & bottleneck identification and elimination Technologies like Rails, Node, Go, Docker can create vaue for your business. I can help you realize that value. Yuri

    $50.00 /hr
    537 hours
    5.00
  2. Oleg L.

    Oleg L.

    Expert Developer - C# | C++ | C | Delphi | PHP | JS | MySQL | SQL

    Ukraine - Last active: 23 hours ago - Tests: 18 - Portfolio: 10

    I have 12+ years of experience in the IT industry. I have 10+ years of developing desktop applications and websites. I am looking for opportunities to use and sharpen my existing skills, and hopefully acquire and develop new ones as well. I love my work and job as well as my product. This means, hi-quality and perfect-product are my slogan. I am interested in developing desktop application, web-sites, mobile web / native applications, where I can experience and acquire new techniques and experiment and improve them using my own knowledge on the field. I also have some experience in the following areas: video, audio and photo editing.

    Groups: LoginRadius

    $19.00 /hr
    881 hours
    5.00
  3. Franco L.

    Franco L. Agency Contractor

    Web Developer - NodeJS / PHP / JS / SOA Apps / APIs and more

    Argentina - Last active: 12/22/2014 - Tests: 8

    I'm able to create complete sites from scratch by using frameworks or iterate over your existing app. My knowledge is always growing (I dedicate time to read everyday), but if I've to name a few I would say GIT/SVN, bash skills (linux commands overall), databases (MySQL/SQL Server/MongoDB), HTML, CSS, NodeJS, PHP, Automation, Code Generators and much more If you take a look at the tags section of my profile you'll see more, but if you are doubting if I can do it, please don't hesitate to contact me! Sincerely, Franco Laiuppa

    Associated with: Franco Laiuppa (AGENCY)

    $38.89 /hr
    4,194 hours
    4.38
  4. Chase Gassert

    Chase Gassert Agency Contractor

    Web Expert

    United States - Last active: 12/08/2013 - Tests: 3 - Portfolio: 3

    I'm a CEO, Sr Programmer, Network Admin, Digital Automation Expert, Entrepreneur, Internet Innovator, and Coach. Building disruptive technologies that help pave the path towards a better future is my passion. Business and technology go hand in hand nowadays, and I'm able to blend a strong mix of marketing prowess, technological know-how, and business intuition into the jobs I work on.

    Associated with: Chase Ideas Agency

    $111.11 /hr
    28 hours
    5.00
  5. Vladimir S.

    Vladimir S.

    Trading strategies (Ninja Trader), Betfair API and more

    Bulgaria - Last active: 2 months 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
  6. August Patterson

    August Patterson

    iOS Developer

    United States - Last active: 09/02/2014 - Tests: 2 - Portfolio: 6

    I am a Kansas City local mobile developer, with 4 years experience developing iOS Apps. I've been freelancing since mid-2012 and can provide referrals from every client. Before freelancing, I was the lead dev. over a remote iOS dev. team at a top rated marketed agency, responsible for solution architecture, code structure, quality and all software deliverables. I have developed solutions for everything from a startups first product to an enterprise level licensed software. I can help flush out design and feature ideas, backend data structure optimization, what technologies to leverage, how to code for future growth and cross platform compatibility. Visit my site at Kansapp.com What you get working with me is a developer that understands business and can conceptualize your vision and execute it how you envisioned it. My expertise: iOS apps for iPad/iPhone/iPod, iOS4,5,6,7, Xcode 3-5.x, Extensive Restful Web Service Integration JSON/XML, CoreData for local storage with optional backend mirroring for offline mode, Geolocation Features, Social Media Integration, Photo/Video/Audio Capture/Manipulation/Playback/Streaming, Peripheral Device Integration such as MSR/Barcode Scanner/Keypad/Robotics, Bluetooth/Bluetooth LE integration , InApp Purchase, iBeacon, program with or without StoryBoards, oAUTH 2.0, Unit Testing, Parse Integration, Arduino Prototyping, SQL/SQLite, HTLM5, CSS3, .NET, C/C++, Java

    $83.33 /hr
    0 hours
    0.00
  7. Cihat Gündüz

    Cihat Gündüz

    iOS & Rails-Developer, User Interface Designer

    Germany - Last active: 12/01/2014 - Tests: 1 - Portfolio: 3

    English: Studying Computer Science at Karlsruhe Institute of Technology since 4 years I have already developed 7 apps on my own of which you can find the latest by searching for my first name "Cihat" on the App Store for iOS. For my apps I developed backends using Ruby on Rails which I now have a lot of experience with for using as an API and doing calculations on user data on the cloud. Last but not least I worked on 6 more Apps for customers who contacted me, which was a lot of fun so I decided to go for Freelancer.com. Looking forward for my first experiences here! Deutsch: Ich studiere nun schon seit 4 Jahren am Karlsruhe Institut für Technologie das Fach Informatik und habe nebenher bereits sieben verschiedene eigene Ideen als Apps verwirklicht. Diese Apps findet man schnell im App Store für iOS-Geräte, wenn man meinen Vornamen "Cihat" in der Suche eingibt. Für meine eigenen Apps lernte ich neben der iOS-Entwicklung zusätzlich die Entwicklung von Backends mithilfe von Ruby on Rails, worin ich mich jetzt gut auskenne. Damit bin ich im Stande APIs mitsamt Berechnungen in der Cloud basierend auf Nutzerdaten zu entwerfen. Zu guter Letzt habe ich noch an sechs weiteren Apps von verschiedenen Kunden gearbeitet. Da mir das ziemlich viel Spaß gemacht hat, habe ich mich entschieden, es auf Freelancer.com zu versuchen. Jetzt warte ich gespannt auf meine ersten Erfahrungen hier!

    $50.00 /hr
    0 hours
    0.00
  8. Ronald R.

    Ronald R.

    Consultant, PM, Solution Arch, Sys/Net Engr, Developer, Designer

    Philippines - Last active: 09/27/2014 - Tests: 22 - Portfolio: 5

    I want to help organizations and individuals realize their vision by helping them build their systems and applications. I'm a senior developer, systems/network engineer, solutions architect, and project manager with over 17 years experience in the information and communication technology industry. I've held top management & technology leadership positions in several startup ventures in the field of operating systems & virtualization, mobile technologies, systems integration, and business applications. Two have been acquired at an early stage. I've recently worked as CEO for an offshore development & design outsourcing firm from Israel focused on web & mobile technologies and as CTO for a startup social gaming firm from Canada where I work hands-on with technology while mentoring small but growing teams. I've also led larger technology groups with over a hundred people sometimes from distributed locations. I've developed custom systems directly used by customers & end users. I've also developed systems as a subcontractor and publisher. My most recent projects include an emergency app on the Nokia Store, a geo-social app & a geo/social game on the Android Market, a JavaME app for a celebrity gossip magazine, a mobile/web ordering & delivery tracking system, and a web/mobile rock paper scissors tournament game. I've started my IT inclination as a computer enthusiast way back in college where I took on computer assembly and repair jobs as well as data encoding and desktop publishing to finance my education. Eventually, I learned programming in Turbo Pascal, Turbo C, DBase III+, and Foxpro/Clipper and took on small projects building software applications and database applications such as POS, inventory, and rental systems. Over the years, I kept myself updated with the changing trends and technologies, familiarize myself with new tools, methodologies & practices, and seek opportunities to utilize what I've learned commercially. I've setup systems for small businesses, small ISPs, and more recently small call centers during my spare time. All while playing a key role in the projects or companies I worked for.

    Groups: Buttonwood Technology Group, L.L.C., Central Desktop...

    $44.44 /hr
    100 hours
    5.00
  9. Pavel Vlasov

    Pavel Vlasov

    Software Engineer

    Russia - Last active: 5 months ago - Tests: 5 - Portfolio: 1

    I’m a software engineer with more than 4 years of experiences. I like mobile technologies and apps, discover new destinations, meet new people and really like to share my knowledge and tricks with colleagues and friends. Beyond work, I attend tech conferences and hackathons, where sometimes I pitch with cool projects.

    $25.00 /hr
    252 hours
    4.76
  10. Joseph V.

    Joseph V.

    Software Engineer

    United States - Last active: 12/02/2013 - Tests: 2 - Portfolio: 2

    As a programmer, I aim to create software solutions that push technological limits. It is my goal to stay ahead of the tech curve. Innovation is my best practice. In my opinion, the technology in this world is leaning towards mobile technologies. Entrepreneurs are striving to fill the mobile app gap. This space can be confusing without an engineer who knows the field. If you have never heard of an API, PhoneGap, Native Development, or Urban Airship, you will need someone like me.

    $22.22 /hr
    3 hours
    5.00