Top Upwork Freelancers

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  1. Paul M.

    Paul M.

    Multi-disciplined Development Engineer

    South Africa - Last active: 6 months ago - Tests: 5

    I have been involved in software and hardware product development in the electronic manufacturing industry for the last number of years. Primarily this focus has been on embedded development on ARM with C++ but also Java, C# and PHP for testing, prototyping and for the development of other products and services. I have also worked in the research sector, around the field of space science and astronomy instrumentation. My strong background in electronics and software development is complimented by more than a decade of experience using open source tools and systems to deliver robust and scalable solutions to industry. I would be interested in endeavours where I can leverage my skills and expertise to create lasting customer value.

    $55.56 /hr
    51 hours
    5.00
  2. Hassan Khan

    Hassan Khan

    Senior DBA and Application Developer

    Pakistan - Last active: 6 months ago - Tests: 9 - Portfolio: 4

     Versatile and accomplished management professional offering over 9 years of experience in database and application server administration, and application development across various industries.  Proficient in Oracle Developer 4.5/ 2000/ 6i/ 10g, Access, VBA, Crystal Reports with Oracle, SQL Server, Access Databases on huge networked installations consisting of AIX, and Windows servers.  Recognised for hands-on experience in installing and testing new versions of the database management system and maintaining data standards, including adherence to the Data Protection Act.  Strong working knowledge of controlling access permissions and privileges; developing, managing, and testing back-up and recovery plans, and ensuring correct functioning of storage, archiving, back-up, and recovery procedures.  Showcasing exceptional organisational, multi-tasking, and analytical skills leading to effective operational excellence and communicating regularly with technical, applications and operational staff to ensure database integrity and security.  Adept at commissioning and installing new applications and customising existing applications in order to match them appropriately; and working closely with IT project managers, database programmers, and web developers.  Strong expertise in leading application development teams and administration and tuning of Oracle Databases including Container Terminal Management System, Core Banking, Oracle Financials, HRMS, Treasury, AML, KYC, Siebel, and Knowledge Manager.  Skilled initiator of successful strategies ensuring effective operational excellence and improved work ethic, culture, and performance. Received Appreciation letter from the CEO of Karachi International Container Terminal for successfully implementation of CARe project.  Excellent communicator and a top negotiator with an ability to work under pressure in fast-paced, time-sensitive environments. Proven ability to effectively interact with people of diverse nationalities; comfortable working in a multicultural setting.

    $16.67 /hr
    116 hours
    4.94
  3. Harsha Halgaswatta

    Harsha Halgaswatta

    Advanced Java/JavaEE Engineer

    Singapore - Last active: 5 months ago - Tests: 1

    Well versed Java/JavaEE developer having more than 6+ years of hands on experience in Play Framework, MongoDB, RabbitMQ, SOAP, JAX-WS (WS-*), MySQL, Redis, NodeJS, Bootstrap, Spring, Hibernate, Google API, XSLT, Shell Scripts. Besides that I have done many Enterprise Integrations with e-Commerce platform with ERP and WMS using Java. Further I have contributed to many open source projects and clients in different domains. I love to use my free time in productive works helping people around. http://www.linkedin.com/pub/harsha-halgaswatta/38/a99/196

    $20.00 /hr
    238 hours
    4.78
  4. Simon Lang

    Simon Lang

    Software Engineer / Web Application Developer. PHP, MySQL, JavaScript

    United Kingdom - Last active: 02/13/2012 - Tests: 3 - Portfolio: 1

    I am a 24 year old web application developer from Brisbane, Australia - although I'm currently based in Edinburgh, Scotland. I have a Software Engineering degree, and about 10 years of industry experience. (5 in programming and web, 5 in general I.T. support) If you're reading this, hopefully you're interested in giving me some work. I really love my job - making web applications is *fun*. I'm always keen to work with talented, passionate and like minded people, so please get in touch if you think we'd work well together. Ideally I would love to be working on challenging projects that are founded on a Zend Framework back-end and a rich Javascript front-end interface. I am also starting to experiment with developing my first Chrome Extensions, Android Apps, and Google Marketplace Apps. I'm a bit of a Google Fanboy and love working with their APIs. http://www.simonlang.org/

    $66.67 /hr
    552 hours
    5.00
  5. Vadim S.

    Vadim S.

    Experienced Web Developer, skilled at PHP/MySQL/JavaScript/HTML/CSS

    Ukraine - Last active: 10/21/2013 - Tests: 14 - Portfolio: 6

    See http://www.skorba.pp.ua/en/ for more details OS, software, environment: Excellent knowledge of Windows and Unix systems at the administrator level. Knowledge and experience in setting up and implementation of application software. Main working bunch — LAMP. Expertise in configuration, support, optimization of web servers and associated environments, using memcached, nginx, HAProxy, Varnish, scribe. Development Experience: 9-year experience of web development in PHP (Java, Python), profound understanding of OOP and MVC model using PHP-frameworks (ZendFramework, CodeIgniter, Symfony, CakePHP, Yii) for its implementation. Experience in designing high-loaded systems, their object model and database structure, using ER and UML-diagrams, documentation and the subsequent successful implementation, upgrade and support. Technologies: Proficient in W3C valid XHTML layout (and solving problems of incorrect display in different browsers), CSS, JavaScript, using various frameworks (JQuery, ExtJs, YUI, MooTools) to implement a dynamic user-friendly interface. Understanding and applying AJAX-technologies, SOAP/REST data exchange between web services, implementation of web services. Instruments: Use — Doctrine, Propel as ORM, as well as the Sphinx for the implementation of relevant and rapid search. Experience in applying for the template - XSLT, Smarty, in-line PHP, LESS. Using Mantis, dotProject, Trello, Trac, Jira, Basecamp, Assembla, Unffudle as a bugtracker for the project management and monitoring tasks. Version control — Mercurial, Git, CVS, SVN. IDE — Eclipse, NetBeans, ZendStudio. Apache, nginx, lighttpd as a web servers, MySQL, MSSQL, PgSQL, MongoDB, memcache, redis - as data storage and cache. Used flexible Agile principles (Scrum, Kanban) for team development and management.

    $55.56 /hr
    673 hours
    5.00
  6. Mariusz Z.

    Mariusz Z.

    Penetration Tester, Linux/UNIX Security Admin,Intrusion Analyst, CISSP

    Poland - Last active: 3 months ago - Tests: 9 - Portfolio: 1

    I'm Linux Security Administrator & Web Application Penetration Tester with 8 years of experience in the IT field. I'm CISSP (ID# 478556) and OWASP member. My expertise ranges from designing, building secure & robust systems to analysis of subtle software security flaws. I can help you with: - thoroughly security testing your web application (black-box and/or white-box tests) and helping in mitigating detected vulnerabilities - analyzing and assessing vulnerabilities in your application's underlying IT infrastructure - security hardening Linux/UNIX servers/clusters - recommending solutions and best practices on how to design and maintain secure AWS infrastructures - responding to security incident in Linux/UNIX environment, helping in recovery process (rootkit detection, malware removal, etc.)

    $19.00 /hr
    123 hours
    4.79
  7. Ivan Dunkiy

    Ivan Dunkiy

    Mobile developer

    Ukraine - Last active: 5 months ago - Tests: 3 - Portfolio: 1

    I'm end-to-end mobile developer. Made and released 7 projects both for Android and iOS. Used to work with technologies such as: REST, ORM, Push Notifications, SQLite, Google Maps, GSON, PayPal and others. Custom Layouts and Views creation. Used multithreading, background services, gestures listeners. Deliver your project from the start with specifications, requirements and design developing to the end with making support and analysis.

    $27.78 /hr
    22 hours
    5.00
  8. Inayat Hussain

    Inayat Hussain

    Senior Software Developer, Architect

    Pakistan - Last active: 4 months ago - Tests: 3 - Portfolio: 2

    I am a professional software developer. Over the last 4 years, I have been involved in developing Desktop and Web applications using Microsoft technologies. I have been working as an architect as well. I have strong skills of .Net, C#, ASP.Net MVC, Jquery, Ajax, WPF, XAML, MVVM, Infragistics UI Tools, PRISM and Sql Server etc. I am a good desktop UI Designer as well. Furthermore I have good analytical skills. I am a hard working and an honest person. I strive to learn new technologies and keep myself up to date. Currently I am working as a Senior Software Engineer in a local software house. I have a little experience of Interactive Brokers and TWS as well. I am a little familiar with Bitbucket, git and tortoisehg. I have strong skills of *.Net Framework * C# * ASP.Net MVC, * Jquery, * Ajax * WPF * MVVM * PRISM * Design Patterns * Infragistics UI tools * OOP * Data structures * Strong Analysis * SQL Server * NHibernate

    $11.11 /hr
    205 hours
    4.84
  9. Mikhail Medvedev

    Mikhail Medvedev

    Web Developer - Python, Javascript, Java

    Russia - Last active: 04/28/2014 - Tests: 3 - Portfolio: 2

    I'm experienced back-end and front-end web developer. Interested in complex web projects. Specializations: Python (Django, Flask/Werkzeug, Google App Engine), MongoDB, Redis, Mysql, Postgresql for back-end. Javascript, HTML5, CSS3 for front-end development. Teamwork - Git, Mercurial, ticket systems. Integrating with third-party services. High-load web applications. Data mining: numpy, scipy, pandas, recommendation engines. "Code complete" is one of my favorite books and I have experience in writing unit-tests and clean object-oriented code. I'm result-oriented, highly motivated programmer who is passionate about quality of code and modern solutions.

    $25.56 /hr
    1,043 hours
    4.98
  10. Eugene Krasnopolskiy

    Eugene Krasnopolskiy

    Java/Android Developer

    Ukraine - Last active: 6 months ago - Tests: 2 - Portfolio: 13

    • I have been working in software development since 2006 and have participated in development of several medium to large software projects on Android and .NET. Now I'm working as self developer. I have freelance project and several own projects. • I'm developing by Android platform more than 7 years and have a good experience with the full cycle development of the applications. Technical Skills Programming Languages • C#/.Net • Java Technologies • OOA/OOD/OOP • Multithreading Databases • SQLite MySQL, MSSQL Web • SOAP, JSON • HTML, CSS, XML/XSL/XSLT/XSD, XACML, XAML Operating Systems • Android, BlackBerry • Windows 2000/XP/Vista/7 Tools • Visual Studio 2005/2008/2010 • Eclipse • Reflector, Snoop, Wireshark • SVN, Perforce, WinMerge • MS Expressions/ MS Blend • StarUML Verticals • Android development Other • ActiveVOS • JBoss • Ant • FreeSwitch • TeamCity • AndEngine

    $10.00 /hr
    52 hours
    4.72