Top Upwork Freelancers

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  1. Jorge T.

    Jorge T.

    Expert programmer with a math background

    Colombia - Last active: 10 hours ago - Tests: 8 - Portfolio: 6

    I'm a programmer (though really a mathematician) with over 10 years of experience developing web & desktop apps. I've been using Python frameworks (like TurboGears2, Flask or Django) for web development for a long time, but I'm also very capable of working on a more traditional stack using WordPress, Drupal or CodeIgniter. I can do frontend development also using HTML/CSS and I'm particularly fond of jQuery for AJAX behavior and in-browser animation. For non-web development I use a lot of Python for scripting and rapid programming and Cairo/GTK+ to build graphical interfaces that are portable between platforms. I'm particularly interested in scientific and math-related software but I can do other kinds of programming. In short: I want to build things I can be proud of.

    $34.56 /hr
    4,730 hours
    4.69
  2. Nickolay Savchenko

    Nickolay Savchenko

    Python developer/System administrator

    Ukraine - Last active: 1 day ago - Tests: 11 - Portfolio: 3

    I spent most of my live near computers, enjoying finding out new possibilities. I went to university to study computer science, and I took part in few scientific projects. I learned about most cutting-edge technologies - programming languages (Pascal, C, Python, Lisp, Haskell), databases, cryptography, computer networks, website development, UNIX system administration. My current goal is to stay on the bleeding edge of technology and I am seeking opportunities to find a job where I can use my skills in practice.

    $33.33 /hr
    8,426 hours
    4.97
  3. Farhan Anjum

    Farhan Anjum

    Senior Web Developer/Architect - C#, MVC, Jquery, SQL, HTML, CSS

    Pakistan - Last active: 5 days ago - Tests: 5 - Portfolio: 40

    Over the last 8 years, I have developed a wide range of websites using ASP.NET, C#/VB.NET, MVC, Entity Framework, AJAX, SQL Server, MySQL,HTML, CSS and JQuery including sites for start-up companies, medium level organizations and small businesses.I have also developed Desktop application including some Mega Applications. My core competency lies in complete end-end management of a new website development project or Software and I am seeking opportunities to build websites/Software from the ground up for you or your business. I also have experience in the following area(s): Web Services, Web API, WCF, SOAP, XML, JSON, MongoDB, DOM and Javacript

    $22.22 /hr
    3,574 hours
    4.96
  4. Pasqualino Ferrentino

    Pasqualino Ferrentino

    Machine learning, pattern recognition, image analysis, sys developer

    Italy - Last active: 10 hours ago - Tests: 17 - Portfolio: 1

    I am a computer scientist whose main skills are in the field of data analysis, pattern recognition, statistical software, machine learning and large scale system design and integration. I have developed systems using Neural Networks, Markov chains, Support Vector Machines in various applications: OCR, image processing, data analysis, text indexing and retrieval. I am also proficient in 3D image visualization using common off the shelf libraries and methodologies, either low or high level, like OpenGL, DirectX, VTK, Java3D. I understand and use common ray tracing programs. I understand image processing topics like segmentation, thresholding, classification. I have worked in the past in a 3d Face recognition European project. I know the OpenCV library quite well. In the field of "general programming" I have a good understanding of Databases, multi threaded applications, sockets, pipes, encryption (symmetric and asymmetric), compiler design, operating systems, low level data structure in memory and on disk, data integrity. I consider myself an expert in data structures and algorithms: trees, queues, lists, b-trees, hash tables; I use standard libraries like STL, Boost, Java generics. I have a good knowledge of SQL and data normalization however I have also used custom No-SQL databases like Datadraw, MapDB, Tokyo Cabinet, Zope. I know all the basic algorithms and templates used in every day coding; regarding data integrity and security. Compression (lossy and lossless), symmetric and asymmetric encryption, public certificates, I have worked with OpenSSL programming, encrypted web services, packet sniffers. I am proficient in all the common every day languages with an emphasis on C++ and Perl. But I can use: Java, Python, Visual Basic, C#, PLSQL, Delphi. I know all the Object Oriented Programming concepts and design patterns and I use them if the need arises, but I am also able to write object-free programs in C or functional languages (like Haskell or Scheme). I know modern version control systems like git and mercurial, even if I can use also older ones like Subversion or CVS. I know Windows programming and API quite well. I have used WPF and WCF to create desktop applications in Windows and web services. I have used Linux and Gui toolkits like Qt which are platform independent. I know XML, XSL, I have used several parsers like the MsXML or Xpath. I know how to validate a XML with a schema. I have worked with a team that handled thousands of XML documents relating to air crashes in a SQL server database. I am able to talk and write in English with fluency. If anything is not listed here either I have forgotten to list it or I can probably learn it quite fast, so don't hesitate in asking!

    $24.41 /hr
    6,674 hours
    4.97
  5. Abid R.

    Abid R.

    Php, WordPress, Html, Bootstrap, Magento, Responsiveness, Javascript.

    Pakistan - Last active: 2 days ago - Tests: 10 - Portfolio: 19

    I have 7 years of experience in Web Development. Following are the Framework in which I have been working for last 7 years. Html/css Bootstrap WordPress Custom PHP Magento Responsive Web development Mobile Friendly Websites Ecommerce stores. FREE SUPPORT: I give 2 months free support after the completion of project. I also give Video tutorials that contain Instructions of how to update the contents, Pages and Products in the website. IMPORTANT: If you are looking for individual web developer/designer for a complete website solution then you are at right place.

    $30.00 /hr
    967 hours
    4.94
  6. Nick P.

    Nick P.

    American Web Application Developer - PHP / MySQL / WordPress

    United States - Last active: 1 month ago - Tests: 2 - Portfolio: 10

    Hi, and thanks for viewing my profile! My name is Nick and I'm an American programmer who lives in Florida (Tampa area). Working in a virtual environment, I feel that a key component to a successful project is proper and accurate communication. That's why i'm available via phone, MSN Messenger, Skype, etc. throughout the life cycle of your project. I've been programming custom web applications for nearly 15 years. More details on my actual programming experience below. Results-oriented systems developer with extensive experience in Classic ASP, ASP.NET, VB.script, ColdFusion, PHP, Flash ActionScript, Flex, CSS, and Javascript technologies(jQuery, Prototype, MooTools). Expertise in custom web application development; client/project management; research and analysis. Proven technology problem-solver with excellent web application development, systems development, workflow, and trouble-shooting capabilities. Ambitious and confident self-starter with strong communication, trouble-shooting, presentation and planning and execution skills for web application development projects. Thrives in a fast- paced, goal-driven environment. Specialties Include: PHP (LAMP & WAMP) Facebook API's & Integrations Android App Development ASP.NET Classic ASP VB.script ColdFusion JavaScript XML HTML DHTML CSS Miva Merchant Flash ActionScripting Adobe Flex MS SQL Server MySQL

    $50.00 /hr
    115 hours
    4.85
  7. Niels Ganser

    Niels Ganser

    German Engineered Ruby on Rails Solutions & Reliable Project Managment

    Germany - Last active: 6 days ago - Tests: 7 - Portfolio: 3

    Hi, I'm Niels, a seasoned software engineer based in Germany mostly working on web applications of all kinds using Ruby on Rails (3 and 4), (My)SQL, mongodb, redis, HTML(5), CSS and JavaScript in an agile manner. I also set up and maintain Linux servers. Several applications that I architected, implemented and maintain are in active production use. Please see my portfolio for details. I have years of experience as a senior developer – working solo, in co-located teams as well as in distributed teams – and hold a postgraduate diploma in Management of Software Projects. My greatest prides are proactiveness, reliability and good communication Please note that I do *not* do graphic design. Not for a lack of interest, but for an unfortunate lack of artistic talent. Sorry! :)

    Groups: Engine Yard Ruby on Rails Professionals Network

    $128.50 /hr
    5,370 hours
    4.97
  8. Siarhei Kirpichonak

    Siarhei Kirpichonak

    Java, liferay, OpenClinica, EDC, Clinical Trials

    Belarus - Last active: 1 day ago - Tests: 3 - Portfolio: 6

    I'm involved in software development during last 9 years. I have good abilities and I'm looking for Java and liferay projects. Skills: Scala (Lift, Play), Akka, Java (Spring, Spring Web MVC, Lucene, Compass, Struts, GWT, JPA, Hibernate, Toplink, JAXP, Castor, Ant, Maven), Java EE (EJB, JSP, Servlets, JMS), RDBMS (PostgreSQL,MySQL, Oracle), (X)HTML/CSS/Javascript, XML/XSLT/XPath, PHP, GNU/Linux

    $30.00 /hr
    1,204 hours
    4.90
  9. Rafal Rzepecki

    Rafal Rzepecki

    The Humanist Programmer

    Poland - Last active: 10 hours ago - Tests: 11

    Highly skilled in programming with C++/Qt, ruby, perl, python, Java/Android, bash. Knows his way around CSS/HTML5/JavaScript, OCaml and SQL in Oracle, SQLite and Postgres flavours. Years of experience using and administering Linux systems, but easily does any task on Windows or Mac when necessary. Enjoys using LaTeX to produce high quality publications; quick and accurate in catching typos and general proofreading. Knows his way around vector graphics and will trace any line art bitmap to a high quality vector illustration. Basic retouching skills.

    $48.89 /hr
    2,675 hours
    4.94
  10. Amit A.

    Amit A.

    Patent Search, Patent Drafting,Patent Drawings, Trademark

    India - Last active: 10 hours ago - Tests: 4

    With above 150+ ODesk Contracts and 4+ years experience in the field of Intellectual Properties (IPs), Have experience of assisting clients from different parts of the world. In the past years, I have got the opportunity to work with Patent attorneys and Agents from various countries so have developed a sound knowledge on the process involved, and working business relationship with them. I have been assisting individual inventors, start-up companies seeking IP services in terms of: 1. Coordination of invention disclosures with the inventors such as to execute various prior Art patent searches. 2. Provide Utility patent support services: Drafting of provisional and Non Provisional Patent Applications based on the technical inputs from the inventors.. 3. Provide International/PCT patent support services 4. Assistance in drafting office action responses by interacting with the inventors.. 5. Assistance in preparing Patent Drawings 6. Provide Design patent support services 7. Trademark services Domain Expertise: Electronics, computers, wireless technology, Electro- mechanical, web technology, including non technical domain. Have handled number of prior art searches from diversified technologies. Look forward to receiving your instructions and to assisting you. Assuring you of best attention and service

    $22.22 /hr
    2,268 hours
    4.93