Top Upwork Freelancers

More options
Clear all filters
  1. Alexey Lazarev

    Alexey Lazarev

    Sencha Ext JS 5.1 / Sencha Touch Expert

    Thailand - Last active: 16 hours ago - Tests: 2 - Portfolio: 4

    The last 5 years of my career I have worked with products of Sencha (Sencha Cmd, Sencha Touch 2.3, Sencha Charts, Ext JS 3.4, Ext JS 4.2, Ext JS 5.x). I was fortunate to work with highly diversified range of tasks. The list includes: - upgrades of applications (Ext JS 3.4 -> Ext JS 4.x -> Ext JS 5.0), - mobile application development (Android, iOS, Sencha Touch), - using Sencha Charts, - integration of third-party libraries into Sencha products (OpenLayers, Highcharts, jQuery, Google Maps, Yandex Maps), - code testing in Selenium, Siesta, Sinon, YUI 2, - refactoring, - fully project reimplementation (rewrite a project from scratch, rewrite a project from JS to CoffeeScript), - consultations, - and much more. Javascript is one of the few languages that gives too much room for creativity, a space to express their thoughts. And unfortunately too easy to go far from the correct direction, from the decision to be easy to understand for other developers. That is why I firmly believe in the need to using hard coding standards and official recommendations. It's not important tha you are using for yours projects - PHP, RubyOnRails, C#, Ajax, XML, JSON, bla-bla... I just said you: Yes, I can do it! It's OK! I know well Git, worked with Subversion, used many task trackers: Jira, Redmine, YouTrack, and others, can't remember all.. Also my expirience included development of a mobile apps using Java for Android. If you need in one of the best, you're welcome!

    $55.56 /hr
    2,457 hours
    4.97
  2. Gary G.

    Gary G.

    Web Development / Java / JSF / PrimeFaces / Lotus XPages Notes Domino

    United States - Last active: 29 days ago - Tests: 1 - Portfolio: 1

    I have over 15 years of development and implementation experience on projects ranging from small departmental applications through complex enterprise solutions in multi-national corporate environments. My software and application expertise is very diverse and includes Java, Java EE, JSF, JSP/Servlets, and related frameworks and APIs including Spring, Hibernate, EclipseLink, JBoss Seam, RESTful Web Services, PrimeFaces, Lotus Notes & Domino, XPages, Visual Basic, and Crystal Reports. My relational database expertise includes MySQL, Microsoft SQL Server, Oracle, and PostgreSQL. Beyond application development, I am skilled in high-level requirements gathering, risk analysis, technical design analysis, application modeling, implementation planning, and support. Please allow me to provide you with not only expert technical skills but the knowledge and experience I have gained delivering a broad range of business solutions such as CRM, Change & Problem Management, Incident Management, Help Desk, Health Care, Human Resources, as some examples.

    $50.00 /hr
    1,400 hours
    5.00
  3. Siavash A.

    Siavash A.

    Senior iOS Developer

    Australia - Last active: 2 days ago - Tests: 3 - Portfolio: 13

    I am an senior iOS developer highly responsible, creative, with initiative and punctuality, I responsibly assume the challenges and goals that the organization assigns me, adaptability to change, ability to work in teams, ability to work under high pressure, as well as to solve problems efficiently and achieve productivity goals set by the company/client and my work group. Experience developing apps in different areas for more than 3 years. (Utility, education, finance, etc.). Exprienced using Parse, Playhaven and Revmob frameworks along with GPUImage API and heavily experienced with Multimedia app using AVFoundation framework. Currently focusing on AppleWatch apps and integrating different technologies to both AppleWatch and iOS device. Swift and iOS8: If you want to make a whole new app using Swift or want to migrate your Objective-C code to Swift, you don't need to search any further.

    Groups: iOS Swift Test Contributors

    $44.44 /hr
    183 hours
    4.56
  4. Vinay J.

    Vinay J.

    iOS/Android Mobile Apps and Games

    India - Last active: 1 day ago - Tests: 2 - Portfolio: 13

    I have 4+ years of experience in both web and mobile software development. Expertise in software development, as technical team leader and project management. I have extensive experience in Social Networks, Minimum Viable Products, prototypes and start-ups. Excels in the following areas: - Mobile Development (iOS, Objective-C, Swift, Android, Android SDK, PhoneGap, Adobe Air, HTML5, Xcode, Titanium/Appcelerator) - MAC Plugins Development - MAC Applications - Adobe Indesign, Illustrator, Photoshop - Mapping, GPS, Location Tracking - Server-side applications development - Database(SQLServer, MySQL, SQLite) - Web Services (PARSE, Restler, Cake php, CodeIgniter) - XML, JSON - Trello, Basecamp, JIRA, ACTIVECOLLAB, SifterApp - SVN, Github, BitBucket

    Groups: Application Developers Alliance

    $33.33 /hr
    1,468 hours
    5.00
  5. Alexander R.

    Alexander R.

    Senior IT/IS Architect, Analyst, Administrator

    Russia - Last active: 3 days ago - Tests: 4

    Senior Information Technologies, Networks and Systems Architect, Analyst and Administrator with extensive experience. Platforms: Windows, Linux, OS X Clouds: VMWare, Amazon Web Services, Microsoft Azure Email systems: qMail, Postfix, Dovecot, Microsoft Exchange Web hosting: Nginx (Winginx), Apache, IIS, Nodejs, PHP, Perl, Tomcat Databases: MySQL, PostgreSQL, MSSQL, MongoDB Enterprise: Google Apps, Microsoft Office 365 And much more custom solutions, software and systems installation, configuration, maintenance and monitor.

    $33.33 /hr
    96 hours
    5.00
  6. Mikhail Ryzhikov

    Mikhail Ryzhikov

    Team Leader, Architect, Lead Developer

    Ukraine - Last active: 16 hours ago - Tests: 5 - Portfolio: 1

    «Job must be interesting. Otherwise it becomes a duty» © ----------------------------------------------------------------------------------------------------------- PHP [16 years experience] — Designs & Patterns, Architecture building, PHP 5.3.x+, Drupal 6/7, Silex, TYPO3, Symfony, Zend Framework, Doctrine ORM, Propel ORM SQL [14 years experience] — MySQL (MyISAM, InnoDB, Memory, CSV engines), SQLite, PostgreSQL NOSQL [7 years experience] — MongoDB, Redis, Memcached XML/XSL [15 years experience] — XML/XSL transformations, XPath, XQuery, DTD/XSD validation schemas, SVG XHTML/CSS [18 years experience] — Native markup, Blueprint, 960 Grid System (w. Fluid), xCSS JAVASCRIPT [16 years experience] — Designs & Patterns, Sencha Ext.JS 3.x, 4.x (inc. 4.1.3), Sencha Touch, jQuery (inc. jQuery Mobile), Prototype, Aculo US, MooTools, YUI VERSION CONTROL SYSTEMS [13 years experience] — GIT, SVN, CVS, Perforce | Gerrit, FishEye LINUX SHELL SCRIPTING [14 years experience] — Bash scripting, GNU Make, SED/AWK UML [9 years experience] — Diagrams, Datagram to Code/Code to Datagram, Flows mock-up development J2SE [1 year experience] — Designs & Patterns SALESFORCE [1 year experience] — APEX (PHP layer binding) DELPHI/OBJECT PASCAL [5 years experience] — Designs & Patterns ----------------------------------------------------------------------------------------------------------- TEAM LEADING — Experience of team leading in 7-people team HIGH-LOADED APPLICATIONS — Experience of high-loaded application development, aimed for usage in aggressive environment ----------------------------------------------------------------------------------------------------------- MORE THEN 500+ SUCCESSFUL PROJECTS CODE SAMPLES (STYLE, GUIDANCE, LINES ETC…) — http://git.developer.com.ua/

    $44.44 /hr
    3,664 hours
    5.00
  7. Federico N.

    Federico N.

    Writer and graphic and web designer

    Portugal - Last active: 16 hours ago - Tests: 2 - Portfolio: 7

    Over the last 10 years, I have developed a wide range of websites using HMTL and Flash, including sites for startup companies and small businesses. My strength lies in my design skills. Besides that, I have design posters, brochures, ads or boxes. My first working days were as a graphic designer and I still loving it. Now I am finishing a HTML5 course in order to refresh and update my web skills. There are two more fields I do my living with, photography and writing. I have my photo website, www.fedenogales.com and I write for different companies, always in Spanish.

    $33.33 /hr
    171 hours
    4.95
  8. Conal Mullan

    Conal Mullan

    Full-Stack Developer - Troubleshooter/PHP/Javascript

    United Kingdom - Last active: 16 hours ago - Tests: 5 - Portfolio: 1

    With a strong technical background in both Windows and Linux server administration, I consider myself to be a highly skilled internet & technology all rounder. Combining both experience and knowledge I can quickly identify and assess customer/client needs and find solutions to suit their requirements. I have been working successfully as an independent remote contractor for over 7 years and have built up particular strengths in MS server products especially SQL Server & IIS - with strong coding skill in javascript/jquery, PHP and experience in many other broader web technologies. I pride myself on being a fast learner and just enjoy making things work. I have been able to maintain long term relationships with my clients and am eager to continue to do so having recently completed a long term contract at another oDesk employer. Having worked in corporate IT for 7 years in a very high service availability environment, I know how to work under pressure whilst adhering to process. My key personal strengths include a keen attention to detail, excellent troubleshooting skills and an easy-going demeanour that helps me build strong working relationships quickly.

    $30.00 /hr
    7,712 hours
    5.00
  9. Mladen T.

    Mladen T.

    Expert designer & video animator

    Croatia - Last active: 16 hours ago - Portfolio: 67

    I have extensive experience (19 years) in graphic design, video and web. Most of the time I was working in all mayor design agencies in Croatia. For last two years I am working as freelance designer. My full 2013 portfolio can be seen at http://designer-2.com I have studied the taste and mentality of the end users, so I can offer a design to attract customers to your business. I am already doing various design projects for my clients. As you can see on my portfolio, I have broad range of design skills. I am looking forward in working with you!

    $30.00 /hr
    264 hours
    4.96
  10. Aleksandr Schepanovskii

    Aleksandr Schepanovskii

    Python/Node.js Developer

    Russia - Last active: 16 hours ago - Tests: 3

    Over years I developed both backend and frontend parts of various web-applications using Python/Django, Perl, Node.js, relational (PostgreSQL, MySQL) and non-SQL databases (Redis, MongoDB), JavaScript, jQuery, d3.js, CSS and Less. I also have some experience with ML using numpy, scipy, scikit-learn, pandas and cython. Here are a few links to save your time: CV: http://careers.stackoverflow.com/suor Github: https://github.com/Suor Blog: http://hackflow.com

    $50.00 /hr
    232 hours
    5.00