Top Upwork Freelancers

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  1. Grigory Korpan

    Grigory Korpan

    Game/Software Developer

    Russia - Last active: 1 month ago - Tests: 5 - Portfolio: 10

    I'm an experienced game and software developer. I began from making 2d mobile games of different genres from kids books to classic platformers and side-scroll shooters. Then I worked at Unigine (unigine.com) on astonishing universal real-time 3D engine for games and simulations. I've worked on naval strategy game Oil Rush (oilrush-game.com) that came out for PC, Mac, Linux, iOS and Android. I've also worked on Valley Benchmark which apple uses to benchmark it's devices (unigine.com/products/valley) and other products of Unigine. Now I'm working on an iOS client for an amazing marketplace. I'm found of writing perfect code, solving challenging tasks and creating high-quality products. :) Key skills: - c++; - objective-c; - c#; - java; - uikit - opengl; - unity - cocos2d; - cocos2d-x; - box2d; - unigine; - unigine script; - flash, actionscript; - svn, hg, git; - scons; - python; - vim, xcode, appcode, visual studio;

    $33.33 /hr
    1,980 hours
    5.00
  2. Igor S.

    Igor S.

    Linux sysadmin, cloud deployments specialist

    Czech Republic - Last active: 1 day ago - Tests: 9 - Portfolio: 1

    I would like to offer you my deep knowledge of servers hardware and software, which allows me to fine-tune servers according to their roles, and my ability to anticipate and solve problems in shortest time possible. No Windows please, Unices only, Linux preferrable. Lately my main point of interest has shifted to deploying and maintaining web projects in cloud environments. I am developing monitoring / management tool ( http://m-script.org ) and supporting existing installations, but I am very well familiar with all well known alternatives from both monitoring and cloud management side, so no problem to implement any of them. The point is, I know very well how it works. And how it doesn't, too :) I am interested in any system administration work, especially in cloud environments. The more challenging you setup is going to be, the better. Automated scalability, cross-clouds deployments, combination of traditional and dynamically scalable resources, DNS/Geo balancing - everything is possible, just let me know your needs.

    $40.00 /hr
    6,971 hours
    4.88
  3. Aleksandr Tolstikov

    Aleksandr Tolstikov

    Drupal / PHP expert

    Russia - Last active: 1 day ago - Tests: 4

    Over 8000 hours on oDesk (only Drupal related). Highly motivated, goal-oriented, hands-on senior software engineer with extensive technical skills and over 15 years of experience in software development. - Expert knowledge of Drupal CMS; - In-depth knowledge of systems architecture and software design methodologies; - 10+ years of experience in web application development using PHP; - Extensive experience in relational database management systems, mainly with MySQL; - Experience in Linux systems administration; - Strong understanding of networking/Internet protocols and formats; - Experience in architecting, implementing and maintaining full-text search platforms;

    Groups: Bluehost Developers and Designers, Drupal

    $40.00 /hr
    8,611 hours
    5.00
  4. Iaroslav Z.

    Iaroslav Z.

    Web / Graphics / UI / UX, Photoshop, Illustrator, HTML / CSS

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

    I'm a professional freelance web and graphics designer from Ukraine, Working with Photoshop, iIIustrator, HTML5 / CSS3 Over the last 10 years i've worked for many high developed US companies that provide high range of web services. My Role was to keep all the graphics and web work in my hands, also communicate with the other developers to achieve the perfect result for a client. Always looking for a full-time position of a Graphics or Web Designer. I'm an expert in what i'm doing: responsible, reliable and communicative person.

    Groups: Yahoo Web Hosting Designer

    $33.33 /hr
    12,009 hours
    4.90
  5. Daniel H.

    Daniel H.

    Creative Web Services in Perl, PHP, Javascript, MySQL, Apache

    United States - Last active: 1 day ago - Tests: 12

    I provide creative, high-tech solutions to your web design and programming needs. I have broad experience in Linux, Apache, MySQL and PHP / Perl. (Also known as the LAMP stack.) I adhere to industry best practices, and bring to your projects the disciplines of MVC framework design patterns such as CodeIgniter in PHP, Git version control, and project management systems such as Jira, Unfuddle, and Trac. I can either work alone, or in collaboration with your existing development team. My projects have been as lead developer or team member alike with great success.

    $30.00 /hr
    12,122 hours
    4.95
  6. Jovan Pehcevski

    Jovan Pehcevski

    Researcher, Academic/technical writer, Data and Information Scientist

    Macedonia - Last active: 4 days ago - Tests: 5 - Portfolio: 3

    As a PhD in Computer Science, I am an experienced researcher, academic writer and data and information scientist. Over the last 12 years I have gathered an extensive experience in practising and teaching the following computer science concepts: information retrieval, data mining, machine learning, database management systems using MySQL and Oracle, native XML databases using XML, DOM and SAX, web development techniques using (X)HMTL, DHTML, PHP, and MySQL, deploying web services and service oriented architectures, and tuning Apache web server for performance, security and caching. My core competency lies in academic research, data and information science, as well as writing, proofreading and editing of research papers and thesis of all academic levels. I am seeking opportunities to offer my rich professional and academic experience for the strategic growth and developmental needs of your business. My core research interests and strengths are as follows: - Focused information retrieval - Evaluation of focused and content-oriented XML retrieval - Entity retrieval and knowledge discovery - Data mining and big data analytics - Business intelligence and predictive analytics - Time-series data forecasting - Recommendation algorithms for social/news networking sites - Native XML databases, NoSQL and relational database systems - Web servers and web technologies - Web database applications and Internet programming - Web and enterprise security

    $66.67 /hr
    1,730 hours
    5.00
  7. Vladislav Y.

    Vladislav Y.

    Network Expert (Cisco CCIE),Datacenter and Virtualization Professional

    Russia - Last active: 1 day ago - Tests: 4

    IT Professianl with 15+ year of hands-on experience, an Cisco Expert in both Routing&Switching (CCIE R&S since 2005) and Service Provider (CCIE SP since 2009) , Professional in Network Security (CCSP), Professional in Vmware Vsphere and Horizon view technologies (VCP-DT and VCP-Desktop) I have extensive experience with Cisco ( IOS, NX-OS) , Juniper, HP networking hardware and technologies, and strong on the side of Virtualization ( Vmware) and UNIX systems (Linux, Solaris, FreeBSD). Microsoft OSs are also part of my experience. I am certified in Linux/UNIX:RHCE on RHEL3 and SCNA on Solaris 9 and 10, also Microsoft-Certified: MCSE.

    $45.00 /hr
    7,395 hours
    5.00
  8. Dimitris Manikis

    Dimitris Manikis

    Software Architect

    Greece - Last active: 1 day ago - Tests: 1

    Software architect and solutions architect experienced in Enterprise Architecture, SOA, Telecoms, Machine Learning, Information Retrieval, Data Mining with focus to solutions based on open standards and open source software. Software Development experience since 1994. Last 10+ years working mainly with Java based technologies. Quick learner, self motivated, passionate about learning new technologies, have worked in a couple of start-ups from the ground up and in various areas of an enterprise such as architecture, software development, R&D, business development and project management.

    $55.56 /hr
    3,685 hours
    5.00
  9. Stacey Rieck

    Stacey Rieck

    Digital Design Engineer

    South Africa - Last active: 1 day ago - Tests: 3 - Portfolio: 6

    Hi there! I'm a qualified Engineer with a BSc in Electrical Engineering who has been designing digital systems for the past five years. My speciality is in the field of signal processing, I have a solid DSP theoretical background, and have written Matlab/VHDL modules that channelise, process video data, calculate fluid flow and redirect ethernet packets. I am experienced in taking algorithms from papers and implementing them into VHDL or SystemVerilog, using Matlab to check my results. I'm also experienced in programming microcontrollers in C, FPGA board circuit design, and SOC device programming. I am a native English speaker and have formal education in Professional Communication in English. Languages: - VHDL & SystemVerilog - C++ & C - Matlab - Python - Perl & Bash - Java Chipsets: - Xilinx Spartan, Zynq and Virtex FPGAs - Motorola, uBlaze, Microchip and TI microcontrollers Tools: - Modelsim - Matlab and Octave - Xilinx ISE and Vivado - OrCAD and Eagle My Experience Includes: - Working with version control. - Collaborating with others on projects. - Developing documentation. - Working in a Linux environment. - Project management. What I am like as a contractor: - I work thoroughly and systematically. - I take pride in my work. - I communicate clearly. - I am passionate about what I do. I can supply my full resume and references of experience as necessary. I'm in the +2 timezone. Thanks for looking at my profile, and I hope to hear from you soon! Kind Regards! Stacey Rieck

    $47.00 /hr
    4,906 hours
    5.00
  10. Jorge T.

    Jorge T.

    Expert programmer with a math background

    Colombia - Last active: 2 days 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
    4,887 hours
    4.69