Top Upwork Freelancers

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  1. Rahul A.

    Rahul A.

    Java,Grails,Google Script & Twitter Api Ninja

    India - Last active: 3 days ago - Tests: 10 - Portfolio: 5

    Besides being an excellent communicator, I am a freelancer consultant with expertise over web,desktop and mobile applications. Till date I have obtained over 50 5* reviews which are true testimonials to the quality of service I have delivered. I am an express learner and I adapt and become adept to new technologies very fast. This is clearly reflected by my job history which shows the wildly different variety of jobs I have worked with and landed them to perfection. I have experience and mastery over several regimes. Primarily I am a java buff as I work with Groovy/Grails for web development and Android for mobile development. Both require supreme expertise over java. I have made a lot of applications using twtiter api. If its about twitter, its about me! Just see the jobs I have done for twitter in my job history and you will realize why I claim that. I am also proficient in making bots,web crawlers, email scrapers , automation tasks based on selenium web driver/htmlunit and jsoup. I have been heralded as the "bot master" by various clients I have worked with due to my outstanding performance in automation jobs. The reason for my success over each job I work upon is my exposure to a plethora of technologies which adds an extra edge to my artillery. I have worked on wildly diverse technologies including: 1) Web Application development: For web application development, I have experience with Grails. I am a master of this wonderful framework developed to make java development really easy and rapid. My role in past projects on grails includes implementation of Restful web services for sql/nosql databases as well as overall application design/development right from the inception to transition/deployment. 2) DBMS: I have worked on sql as well as no-sql. In sql, I have experience with MySql,Sql Server(2008),DB2,Oracle RDBMS. In no-sql, I am a mongoDB master. I have also worked with CouchDB(with android). 3) Desktop Applications: I have made several desktop applications using java swing and javafx. I also have knowledge of Griffon (Grails for desktop). All my applications are characterized by thread safety and robust framework architecture. 4) Mobile Application Development: I have good experience with android framework. All the apps I have worked with are characterized by nice UI and a stable lifecycle by proper handling of application states. My strength over core java concepts like multithreading, runtime polymorphism, inheritance comes in very handy with android app development. Apart from these, I can make background web services using grails for providing data to mobile applications. So you can find a full stack developer in me. 5) Scripting: I have developed various scripts using google app scripts, python and ruby. I have a full fledged ERP running on google drive using google app script with 0 cost for hosting. I always use the best technology for my clients which is light upon their budget. But above all, I consider strong communication skills as my killer strength due to which I got so much success in such a short span of time over this platform. Indeed you would love interacting with me- ITS A GUARANTEE ;)

    $30.00 /hr
    384 hours
    5.00
  2. Sebastian Velasquez

    Sebastian Velasquez

    3D and Web developer

    Ecuador - Last active: 1 day ago - Tests: 6 - Portfolio: 1

    I always want to exceed the expectations of costumers by providing the best results for every project. These are my skills: Programming and scriptinn languages: Java, JavaScript, AJAX, SQL, JQuery. Libraries and toolkits: OpenSceneGraph, Google Earth Javascript API, Google Maps Javascript API. CAD and design applications: Autocad, Google Sketchup, Photoshop, Moi3D. Others tools and technologies: UML, XML, XHTML, KML, CSS, Wordpress, Joomla, GlobalMapper, CSV/SVN.

    Groups: Application Developers Alliance

    $16.67 /hr
    7,789 hours
    5.00
  3. Pavel S.

    Pavel S.

    Java Developer

    Russia - Last active: 2 months ago - Tests: 5

    In programming since 2004 (Oracle pl/sql in Banks). Now I am Java Developer (3 year of J2EE web development). I have involved in website development using JSF 2, JSP 1.2, JSTL 1.2, Servlet 3.0, Spring, JDBC 4.0, Tomcat 7, MySql. Experience in Maven, JUnit, Mockito, Git, Jirra. Understand HTML, CSS, Sql, Java Script. I want to strengthen my knowledge in J2EE with your greate Team. Also I want to become Java Enterprise Architect and work hard for this! Looking for any part time job upto 10 hours per week.

    $16.67 /hr
    36 hours
    5.00
  4. Ivan Fokeev

    Ivan Fokeev

    Universal programmer

    Russia - Last active: 29 days ago - Tests: 5 - Portfolio: 3

    Hello. My name is Ivan. Over the last 7 years I have developed different information systems including Web sites and CRMs using many technologies such as: PHP, HTML, CSS, Javascript (+ JQuery), MySQL and many others. Last 2 years I dive into Ruby and Python. I really love Ruby On Rails and Django (but Rails more). Like to write clean OOP code with unit-tests. I worked with PHP frameworks: Kohana, Zend Framework, CodeIgniter. I like MVC and REST, have experience in writing REST API. Had projects with VK API, FaceBook API, Amazon S3, Cloudflare and others. I practiced with Arduino and have made a little robot: http://goo.gl/KTJn4P I can program simple apps with C/C++/C#/Objective-c (mac & iPhone) Also I like powerlifting :)

    $22.22 /hr
    152 hours
    4.73
  5. Minh N.

    Minh N.

    Experienced Java Developer

    Vietnam - Last active: 25 days ago - Tests: 2

    - Over twelve years' experience in software development using JAVA. - Strong experience in the analysis, design, development and implementation of web applications using JAVA frameworks. - Strong experience in databases: MySQL, PostgreSQL and Oracle. - Strong skills included Java/JSP/Servlet, JavaScript/HTML/CSS, GWT, Spring, Hibernate, Tapestry, Struts. - Good knowledge in Android programming. - Good knowledge in other programming languages such as C/C++, C#, PHP and Erlang. - Good English in communication skills. - Worked as a team leader in both independent and inter-dependent environments.

    $20.00 /hr
    41 hours
    5.00
  6. Sergey L.

    Sergey L.

    Senior Web Developer PHP/MySQL/API, Javascript/HTML/CSS, MEAN

    Ukraine - Last active: 1 day ago - Tests: 7 - Portfolio: 3

    Professional and reliable programmer with 7 years of experience and excellent skills in software development. * PHP5/ MySQL * Ajax/ jQuery/ Javascript/ AngularJS/ Bower * HTML5/ CSS3/ Responsive design (Bootstrap) * APIs (Facebook/ Twitter/ Google/ Stripe/ PayPal/ Mailchimp etc.) * WordPress/ WooCommerce - plugins and theme development/ Customization PHP5/ Node.JS MVC Frameworks: * CakePHP * CodeIgniter * Laravel * Yii - framework * MEAN Version control — SVN, GIT (GitHub, Jira, Assembla etc.)

    $25.00 /hr
    5,893 hours
    5.00
  7. Samnang Chhun

    Samnang Chhun

    Expert Ruby/Rails Developer - Software Craftsman

    Cambodia - Last active: 18 days ago - Tests: 1 - Portfolio: 9

    I'm among top 1% freelancers on Upwork. I have been developing software professional for the last 10+ years. I have have working on Rails since Rails 2.3 came out. Over the last 6 years, I have worked a wide range of applications using Ruby on Rails for startup companies. I have helped many US startup companies to build their team and grow with them.. I am agile practitioner, and Pair Programming lover, TDD/BDD, OO Design Principles, and OSS. I am an alumni of Ruby Mendicant University. Website: http://samnang.me Github: http://github.com/samnang LinkedIn: http://www.linkedin.com/in/samnangchhun

    Groups: Microsoft Certified Professionals

    $98.00 /hr
    6,194 hours
    5.00
  8. Krastyo K.

    Krastyo K.

    Java/SQL/C++/C# Developer

    Bulgaria - Last active: 1 day ago - Tests: 2

    I have more than 15 years experience of Web and Desktop programming, using variety of technologies - web programming using Java or ASP.NET, JQuery, Ajax, HTML, CSS; SQL databases; different tools, services and applications with C++/C#. During my work carrier I have been involved in many projects, focused in various fields of interests - database driven web sites and applications, Windows desktop applications, CAD/CAM systems, MS-Office automation applications, device control systems, large database support applications.

    $20.00 /hr
    1,358 hours
    5.00
  9. Andrei S.

    Andrei S.

    Senior Front-End Developer

    Belarus - Last active: 12 days ago - Tests: 8 - Portfolio: 2

    Software Developer with 6+ years in IT with a focus on Front-End development. - Solid knowledge of Javascript and HTML. Experience in various JS frameworks like jQuery, Knockout, AngularJS, WinJS - Strong knowledge of .NET platform and MS technology stack. - Experience in building modern applications based on AngularJS, Twitter Bootstrap and ASP.NET Web API - Experience in building distributed systems based on NServiceBus framework - Experience in Agile and Scrum methodologies, TDD and BDD practices - Microsoft Certified Application Developer Specialties JavaScript, Dojo, JQuery, HTML5, CSS3, RequireJS, Ajax, Windows 8, C#, .NET, ASP.NET, ASP.NET MVC, Dapper, Entity Framework, Selenium, LINQ, SQL Server, Web Services

    Groups: Microsoft Certified Professionals

    $14.00 /hr
    833 hours
    4.99
  10. Shehroze Farooqi

    Shehroze Farooqi

    Web Devloper and Android Developer

    Pakistan - Last active: 1 day ago - Tests: 4 - Portfolio: 5

    Over the last 3 years, I have developed a wide range of websites using HMTL, PHP, and MySQL . I have been working extensively in JavaScript and Jquery. I am also working on android development project. My core competency lies in complete end-end management of a new website development project, and I am seeking opportunities to build websites from the ground up for you or your business. I have experience in following areas: Web Deveopment (PHP,ASP,JSP,SQL) Web Designing(HTML,CSS,CSS3) Javascript, Jquery,and some other libraries Android Development C++, Java and c#

    $25.00 /hr
    53 hours
    4.94