Javascript Programmers and Developers

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Hire talented Javascript experts from the pool of highly qualified programmers on Upwork to support your server-side programming, or to build your applications for the desktop or browser, for games, or for other front-end applications

Since 1995, Javascript has grown to be one of the most frequently used computer programming languages. It’s a multi-paradigm programming language that can be used for websites, PDF documents, games and desktop widgets. On Upwork, the world’s largest online workplace, companies and individuals hire skilled Javascript developers to create software solutions and front-end applications.

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JavaScript Job Cost Overview

Typical total cost of Upwork JavaScript projects based on completed and fixed-price jobs.

Upwork JavaScript Jobs Completed Quarterly

On average, 4,736 JavaScript projects are completed every quarter on Upwork.

4,736

Time to Complete Upwork JavaScript Jobs

Time needed to complete a JavaScript project on Upwork.

Average JavaScript Freelancer Feedback Score

JavaScript Upwork freelancers typically receive a client rating of 4.68.

4.68
Last updated: May 1, 2015
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  1. Ivan T.

    Ivan T.

    Ruby / Rails Architect w/ scaling exp. 8 yrs, 12k hrs, 100pct success.

    Russia - Last active: 1 day ago - Tests: 3 - Portfolio: 1

    Independent full-stack developer / technical architect skilled in: * Ruby / Ruby on Rails (from edge to legacy) * Scalable, decentralized (modular) applications architecture * Databases: relational (PostgreSQL, MySQL), NoSQL (Redis, Riak, MongoDB, Neo4j), big-data-specific (Google BigQuery, Amazon Redshift) * Background jobs processing: Sidekiq, Resque, delayed_job * Message queuing: RabbitMQ (AMQP) * Client-side tech (HTML5 / CSS3 / JavaScript [native / AngularJS]) * RESTful APIs implementation, integration with any third-party APIs, data harvesting from sites which do not provide an API * Social media integration (authentication, querying, publishing): Facebook, LinkedIn, YouTube, and more * Process: TDD/BDD with RSpec, Cucumber, Capybara, Zeus, Guard * Rails applications deploy, monitoring, maintenance: Heroku, Amazon EC2, Linode, Heroku) * Amazon Web Services infrastructure: EC2, S3, Glacier, Redshift,.. * Version control systems: svn, git (with GitFlow, GitHub Flow workflows) As a back-end technical architect / developer, I can develop scalable and stable multi-node server-side applications and also can evaluate your Ruby/Rails application and make suggestions on possible optimizations / refactoring / adopting best practices. As a team lead, I can divide, regroup, prioritize and delegate tasks to developers, consult developers on best practices, ensure high overal quality of software product. I like challenges, have solid skills of problem solving, do not require supervision to successfully perform my duties. Dependability is also one of my key strenghts (never left my work half-done / half-functioning). If my current rate fits your project's budget, contact me to discuss technical and other aspects — I'm looking forward to it.

    Groups: Engine Yard Ruby on Rails Professionals Network, oDesk Verified Web Developers

    $100.00 /hr
    12,809 hours
    5.00
  2. Przemyslaw Wrzesinski

    Przemyslaw Wrzesinski

    Professional mobile developer

    Poland - Last active: 20 days ago - Tests: 3

    Professional mobile developer, experienced mostly on iOS. My speciality is connecting projects made in Unity 3D Engine with standard developer API's and providing Augmented Reality in various forms. I am also a proficient data scraper, using mainly Robobrowser - a Python library designed for Data Scraping. I am a fast learner - can grasp concepts behing new technologies, and start working with them, almost instantly. During my work I've completed projects involving many diversified technologies and found my passion there. I co-own a company specialized in 3D printing, a great new way of rapid manufacturing. My best known languages: C++, C#, Objective-C, Java, Python, Javascript, and more.

    $50.00 /hr
    16 hours
    5.00
  3. Luke Jurgs

    Luke Jurgs

    Senior PHP/Javascript/SQL Developer

    Australia - Last active: 15 hours ago - Tests: 5 - Portfolio: 2

    Over the last 12 years I've worked with PHP, MySQL/PostgreSQL/MSSQL, JavaScript, HTML/CSS and related web technologies to create a large number of websites and web applications. I've worked for a number of startups and for a large listed company. My strength is the knowledge I have of what the web application stack is capable of, how interacts with the underlying server software/hardware and browser. This insight allows me to build robust, sophisticated and fast software. Most recently I have been building thick client side applications using Backbone.js and Require.js. I believe that the future of consumer software is going to be dominated by this type of software stack. It gives me great pleasure to be building the future right now. I also have excellent Ubuntu/Debian/CentOS Linux administration skills and have managed a large number of different servers. If you're after a serious and capable programmer then look no further.

    $42.00 /hr
    2,194 hours
    5.00
  4. Jonathan Duncan

    Jonathan Duncan

    C#,VB,WPF,ASP,MVC,WebAPI,HTML5,Bootstrap,Javascript,Angular,SQL,SSRS

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

    25+ years of programming, 14+ years as a job. It's not just how I make a living, it's also something I really love and enjoy doing. I develop robust desktop software, great responsive websites, optimize databases and create reports. I communicate well and feel that it is my duty to let the client know how things are progressing. I also give constructive input but respect the client's final decisions. I program desktop programs in C# and VB.Net (both WinForms and WPF) and websites as either ASP.Net, MVC 5 or single page Angular applications. I have worked heavily with MS Access and MS SQL. I have extensive experience writing reports for SQL Server Reporting Services(SSRS) and RDLC reports for web and desktop applications. Here are a few aspects of the challenging projects I have worked on so far. Added eyedropper functionality (pick a color from an image) using HTML5 Canvas and listed fonts installed on the computer to a single page SVG graphic editing web app. Created custom mouse cursor. Runs on Chrome, Firefox, Safari, Opera and Internet Explorer. Created response Bootstrap WebAPI/Angular site to teach Latin. Created an MVC 5 demo website for travel agents to create and manage quotes. Wrote a program to play music on a low-latency and high fidelity 8 output channel professional sound card. Created an output program for industrial displays. Wrote a program that receives industrial protocol messages over TCP/IP and follows with the appropriate action. Read and nicely write INI files. Created solid user registration and product activation for desktop applications. Created graphic editor with easy user interface for complex set of symbols. Advanced document layout for specialized graphics. From a third party website, retrieve the distance between two locations for use in calculations. Load GoogleMaps map in desktop application with route between source and destination addresses. Created an ASP website to edit database. Created custom JqueryUI controls to validate and display the data in a user friendly way. Make websites with HTML5, javascript, and JQuery. Created and optimized MS SQL databases. Displayed time from events in database in the user's time zone. Optimized, rotated and created arrays of 3D data. Created fast working implementation of a query to find areas of similar data throughout millions of records for MS SQL. Made reports (SSRS) with automatic emailing to the clients. Made a RDLC report for a desktop application based on MS SQL. Implemented a full costing program in MSAccess. I also speak, read and write English, French and Spanish fluently.

    $40.00 /hr
    3,451 hours
    4.75
  5. David L.

    David L.

    Senior J2SE/J2EE, Javascript developer, Dojo Expert, AngularJS.

    China - Last active: 15 hours ago - Tests: 3

    Over the last 8 years, I have developed a wide range of web applications using Java, J2EE, WebService, Applet, HTML, DHTML, Javascript and MySQL, MSSQL, Oracle . I am seeking opportunities to build websites from the ground up for you or your business. Technical Skills: - Java - Core Java, J2EE - JDBC, JTA, JMS, Java Servlet, JSP - Web Services, XFire - Struts, Hibernate - JavaScript - Dojo Toolkit - Extjs - jQuery - AngularJS I also have some experience in the following areas: DOJO, SQL, Ajax, OOP, and software design and testing.

    Groups: Crossrider

    $55.56 /hr
    3,621 hours
    4.87
  6. Nikolay C.

    Nikolay C.

    Brainbench certified JSE/JEE dev, DB dev, Sys-Arch

    Ukraine - Last active: 15 hours ago - Tests: 2 - Portfolio: 11

    Would you like to find a powerful Java-dev? If so, please read further... 1. Intentions I'm working as a free-lancer more than 2 years already, and worked > 12 years in scientific and software engineering areas. I'm here because I'm looking worldwide for interesting work related to software development using the following technologies (some or all): - Java 5/6/7 (JSE, Swing, CORBA, Web Services, etc.) - JEE5/6 (EJB3, JSF, Hibernate, etc.) - GWT, Spring, Struts, etc. - And other JSE/JEE-related frameworks - GlassFish, Tomcat, JBoss, Jetty, etc. - JME (CLDC 1.1, MIDP 2.0) and Android - Maven, Ant, etc. - Oracle, MySQL, PostgreSQL and other DBMS - Some sub-tasks could be related to C/C++ with STL (but NOT the whole project!) - UML and/or Agile Modeling - Well-organized Agile processes - Etc. It would be nice to be involved into software concepts and architecture development. Also it would be nice to have possibilities for applying my initiative and creativity. I'm ready to work as a free-lancer for the beginning up to 40+ hours per week), and you may hire me as a full-time employee as well. I'm ready to move mostly to any country or city. In such case I'm ready to start as a developer (or senior developer), but with possibility to grow up to TL, and further up to SA or PM (of course, starting from TL or SA would be nice). 2. Education - University Master Degree in the area of Informatics and Computer Systems 3. General Skills I have a wide working and scientific experience with dozens of technologies (> 14 years). The most deep experience I have with the following techs: - JSE5/6 and J2SE (Java Core, Multithreading, AWT, Java2D, Swing, CORBA, WebServices, Networking, etc.) - since 1998 - JEE5 (EJB3, Hibernate3, JSF, CometD, Jetty, Tomcat, JBoss, GlassFish) - about of 5 years - J2ME (CLDC 1.1, MIDP 2.0, WMA) - about a year - Other Java techs (Jakarta Commons, Log4J, Velocity, Maven, Ant, etc.) - many years - Android development (support about 0.5 years) - C/C++ and STL - since 1995 (STL from 2001) - Oracle 9i/10g, MySQL, PostgreSQL, InterBase - since 2000 - OOA/OOD/OOP and UML Modeling - since 1995 (UML from 2001) Large experience with the following platforms and tools: - Windows - since 1995 - Linux/UNIX - since 1997 - MS Office (incl. Visio and Project) and Star/OpenOffice - since 1997 - IntelliJ IDEA, NetBeans, Eclipse - since 2001 - C++Builder and Delphi - since 2000 - PL/SQL Developer - since 2005 - Enterprise Architect and other UML tools (Rational Rose, Poseidon, etc.) - since 2001 Git, SVN and CVS - since 2001 Management Skills - since 2004 (worked on TL and PM positions) Architect Skills - since 2000 (designing concepts, business models and architectures for quite complex scientific, B2C and B2B applications) Language Skills: - Russian - native - English - fluent, working language since 2001, ~1000 pages of docs written - German - intermediate (quite fluent, but non-perfect) - Ukrainian - can understand in 100%, cannot speak/write fluently 4. Contacts - You can contact me via oDesk. Usually online (GMT): - 10:00am - 5:00pm - 7:00pm - 10:00pm

    $40.00 /hr
    14,090 hours
    5.00
  7. Jovan C.

    Jovan C.

    Quality web development and software engineering

    Montenegro - Last active: 15 hours ago - Tests: 8 - Portfolio: 4

    I am an experienced PHP developer with a degree in engineering/telecommunications. Apart from PHP, I have expert knowledge in MySQL and excellent knowledge in Javascript/jQuery, HTML and CSS. I am well versed in MVC software architecture and several PHP frameworks, as well as WebSocket technology. I develop scalable, secure, object-oriented web applications with efficient database structures. I also have experience in managing projects, hiring and overseeing staff. My English is excellent and I can provide updates as often as needed when I work. Communication will never be a problem.

    $55.56 /hr
    986 hours
    4.87
  8. Huang Jian

    Huang Jian

    Talent developer with high quality

    China - Last active: 1 month ago - Tests: 4

    Seeking software full-time/part-time job as a freelancer. I have 7 years experience of developing enterprise applications after graduated from USTC ( one of the top universities of China ) with a major BS degree in Physics and a minor one in Computer science. ---------------------------------------------------------------------------------------------- Technical Competency Languages C/C++, C#, JavaScript, ActionScript, HTML, VB, Java Platforms .Net Framework 2.0~3.5, Adobe Flex 3.0~4.0, J2SE, HTML5 Software Xcode, Visual Studio, Eclipse, Microsoft Visio, Git/SVN/CVS/VSS, Firebug on Firefox Databases Oracle, SQL Server, PostgreSQL, Microsoft Access Concepts Enterprise Architecture (TOGAF), OOA/OOD (UML, Design Patterns, Refactoring), Multi-threading, Unit, Module and System Level Testing ---------------------------------------------------------------------------------------------- Qualifications Master at Software Analysis/Design and Development - Processing from statement of problems to documented designs Solid background for platforms/languages/frameworks - Flexible to provide best solutions to specific issues with dynamic property Well-trained management skills - Rich experience in leading project teams in multiple styles - Excellent at coordinating the individuals with different background Analytical and quick-learning capacity - Result oriented in processing tasks - Root-cause logic derivation for problem-solving

    $50.00 /hr
    1,611 hours
    5.00
  9. Andrey E.

    Andrey E.

    Web Scraping Expert and PHP Web Developer

    Russia - Last active: 1 day ago - Tests: 7 - Portfolio: 12

    I'm web scraping expert/full stack developer with 7+ years of commercial experience. I'm good problem solver holding M.S. in maths and computer science. Today I'm offering webscraping/php/javascript services as a freelancer. My main skills: • Web scraping, parsing, automation, data processing • Simplehtmldom, Goutte, Symfony Browser Kit, Cheerio, CasperJS, Regular Expressions, Xpath • PHP, JavaScript, Java, NodeJS, PhantomJS, LUA • HTML5, CSS3, LESS, Bootstrap Framework • MySQL, MongoDB, Redis • Memcached, ZeroMQ, ReactPHP • SocketIO, Websockets • REST, SOAP, XML, JSON • Matlab, Wolfram Mathematica • Jquery, KnockoutJS, BackboneJS, RequireJS • Prestashop, OpenCart • Experience working with APIs: Ebay, Spotify, Amazon AWS, Amazon MWS, Flickr, Facebook Graph, Vk.com, GitHub, Instagram and several others • Git, SVN • Apache, Nginx, Curl • Amazon AWS • Linux, Vagrant • Understanding of OOP principles and software design patterns • Teamwork experience My github account is https://github.com/256cats My blog: http://256cats.com/ Over the years I’ve developed a lot of web scrapers of different complexity mostly using PHP (simplehtmldom, browserkit) and NodeJS/PhantomJS (casperjs). Some were simple regex-based and others were complex distributed systems with multiple proxies and Amazon AWS support. Also I developed a wide range of websites using PHP, HTML, JavaScript, CSS and MySQL including several e-commerce websites (+ Prestashop, Opencart). I built sites both from scratch and using frameworks, developed custom modules and extended existing ones for my clients. I have experience in PHP/MySQL performance tuning. Last two years I was working as MMO game (Clash of Clans/Heroes of Might and Magic-like mechanics) logic/backend developer. I’ve implemented distributed message queues, realtime leaderboards with Redis, Mysql, PHP. Developed battle-related algorithms (game unit classes, attack/defend, shortest path, quadtree). Then I’ve done some frontend development, e.g. – developed embeddable javascript classifieds widget and fitness/health single page web application with realtime updates/notifications (HTML, CSS, JavaScript, Jquery, Knockout.js, MomentJS, REST, AJAX, Socket.io).

    Groups: Coding Champs

    $39.90 /hr
    150 hours
    4.98
  10. Husen C.

    Husen C.

    Web Development Expert with System Designing & Frontend Skills

    India - Last active: 1 month ago - Tests: 5 - Portfolio: 9

    Couple reasons why hire me: - Unlike other great developers I know how important is to keep an communication channel. - My working hours are very flexible. I can work for your timezone and I can be available with couple hours notice (depends on communication channel). - I've started developing web applications 8 years ago. By now I was exposed to different areas of product development aspects (not only just coding), so when you need not only coder, but also someone that thinks logically/analytically, I'm your the guy you need for application. - Completed all my odesk job with 5 star rating with excellent client feedback and 100% client return ratio. - Even though my rate may seem little high I can assure you that I'm efficient and spending time purely on planning and development. I'm never charging for anything not directly connected with project (for example filling the knowledge gaps; there will be always something to learn). In the end you're not just getting a efficient developer (peace of mind), but also someone that will help you with project in general (excluding graphic design; I just know I'm not good in that area). Over the last 8 years I have developed many web applications using HTML, CSS, Ajax, JQuery and Server side programming language like PHP & storage system of MySQL for startups and other companies. I also work on latest technologies of HTML5, CSS3 & Bootstrap. I also have wide experience working on CMS like Wordpress, Joomla, Drupal & Ecommerce platforms like Magento. Looking forward for your chance to work with me.

    $33.33 /hr
    1,332 hours
    5.00