Top Upwork Freelancers

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  1. Marek Bogatek

    Marek Bogatek

    Fullstack developer with inclination towards non trivial problems

    Poland - Last active: 9 days ago - Tests: 9 - Portfolio: 1

    I am a wizard. Seriously. I use rare combination of talent, skills and hard earned knowledge and experience to solve others' unsolvable problems. Wonders and miracles done immediately, impossible stuff with minor delay. Upwork is an opportunity to learn more and faster, and get myself involved in much more interesting, diverse projects that I would thought possible previously. Such cases were, for example, helping Panama based company OSOP with systems they use to predict (and provide warnings for) earthquakes in mid-America region; or a web crawling problem that was neglected by everyone passing through the Chegg Courserank project (creating the general solution for this took me to senior engineer position... and further, to team management); lately I was able to provide candidate and code reviews and design basic specifications for entirely novel software - and surely, such contracts showed up as well. You can see some of my previous private/hobby projects on github: http://github.com/zencodism ... and some social programmer activity at stackexchange sites under the same 'zencodism' login. So far, I've created numerous utilities and scripts (C / C++ / Python), a complex image manipulation and postproduction suite (C++ / asm / CUDA, worked on this as a member of a team), some visualisation software: for custom equipment (Java) and voice emotion recognition (Node.js), and a few web based projects (Python with Django, PHP, Perl, Groovy - working with a team on huge CRM system) including also long term contract regarding Java-based web scraping suite I both developed and managed the team involved. Further down the road I'm turning to web applications along with their server counterparts - everything from designing communication protocols with cryptography and some redundancy to a space simulation game I'm writing as a hobby. I can work in and administer various operating systems (Windows, Linux, *BSD, Solaris... this came in handy lately when web development job turned into disaster recovery of remote server), use several databases (mySQL, PL-SQL) and quite a few programming languages; even created one myself, just for fun. What will be next, may be up to you. Feel invited.

    $34.00 /hr
    2,352 hours
    4.72
  2. Alexander I.

    Alexander I.

    C++/C# Developer

    Ukraine - Last active: 3 days ago - Portfolio: 4

    Software developer with 6 years experience and excellent feedbacks. Skills: C# (3 years), WinForms, Linq, ADO.Net; C++ (3 years), VCL, STL, WinAPI, Winsock; SQL, VB, HTML, Java Script, AutoIt, Autohotkey. Additional Info. Approach to tracking / billing time. I track only actual working time, so you'll not see screenshots unrelated to the job, but full working day is considered 3 hours (charged accordingly 3*16$, not 8*16$).

    $16.00 /hr
    933 hours
    4.97
  3. Kostia B.

    Kostia B.

    Python developer

    Ukraine - Last active: 24 days ago - Tests: 4

    Over the last 5 years I've studied Computer Science at Kyiv National Taras Shevchenko University. During this time I took part in a final and a semifinal of All-Ukrainian Student ACM Olympiad, two finals of All-Ukrainian Programming Contest (one of them I won). Worked as an outsourcer for one German company for one year. My obligations were to develop XQuery/XPath scripts for a big framework, based on Web-Harvest. Also I have prepared a number of presentations for talks on scientific and introductory Python.

    $22.22 /hr
    3,312 hours
    5.00
  4. Dragan Savic

    Dragan Savic

    QA Engineer

    Serbia - Last active: 2 days ago - Tests: 4

    Education - Master degree in Computer Sciences and Information Technologies, Faculty of Technical Sciences, Novi Sad, Serbia Area of Expertise - Quality Assurance: Manual testing: • Reviewing user interface • Reviewing software behavior and logic • Documenting any flaws (bugs, layout and workflow issues) • Suggesting improvement options • Cross-browser testing (Firefox, IE, Chrome, Opera, Safari) Automation testing: • HP QTP • Selenium (JET framework) Bug tracking systems: • JIRA, Redmine, Lighthouse, OnTime, adaptable to any Documentation: • Writing test plans • Writing test cases Familiar with: C#, ASP.NET 2.0, 3.5, Win Forms, Web Services, C++, MS Visual Studio, Borland C++ Builder, Java, JSP, Servlets, EJB 2.0 , Web services, JasperReports / iReport, Silverlight 4, Flex 4, HTML, MSSQL, MySql, Sybase – Power Designer, SVN, XML schemas, DirectX, MS Office and all other basic computer programs. Experience Three years working as a QA – manual testing (freelancer): September 2011 - Present :: Quality Assurance on projects with customers all over the world during this period as freelancer February 2013 - April 2013 :: QA - Test Specialist for "ates nearsourcing" company Other working experiences: March 2008 - November 2008 :: Technician specialist in Information Technology for "Telekom Srbija" company January 2009 - February 2010 :: Software Developer (freelancer) July 2010 - March 2011 :: Software Developer for RT-RK company

    $20.00 /hr
    5,144 hours
    5.00
  5. Dmitri Knyazev

    Dmitri Knyazev

    Delphi Programmer

    Russia - Last active: 19 hours ago - Tests: 4

    I am 42 years old, my total programming experience is more than 20 years. Programming has been my only source of income all these years. I have an experience in ASM, C, C++, HTML, JavaScript, PHP, MySQL, but my favourite language is Pascal. Delphi programming experience last 14 years (Deplhi 3 was my first IDE). More than 30 finished projects since 2000 on Delphi in a different areas of life : - supervisory control and data acquisition software - checkers game software - gambling machines (including 3D graphics) sotfware - www parsers, bots, checkers e.t.c. - databases (MySQL)

    $19.44 /hr
    419 hours
    5.00
  6. Arif uzzaman

    Arif uzzaman

    Swift, Objective-c,Xcode,Angular JS, Asp.Net Web API,WPF, MEF, Android

    Bangladesh - Last active: 29 days ago - Tests: 17 - Portfolio: 3

    8 years background in diverse facets of c#.NET development with mobile development experience of 3+ years (Swift, Objective-C, Cocos-2D/3D, Android), encompassing analysis, design, development, and execution of business applications. In-depth knowledge of various platforms, software systems, and servers. Extensive programming experience using WPF with MVVM pattern and MEF and PRISM framework, asp.net, Objective-C, Android, MSSQL Excellent communication skills with strong background working directly with coworkers and clientele to identify business objectives and establish requirements.

    $15.00 /hr
    173 hours
    4.81
  7. Pradipsinh Vadher

    Pradipsinh Vadher

    Web & Software Developer. Hardcore Coder. Full-time Freelancer.

    India - Last active: 8 days ago - Tests: 3 - Portfolio: 13

    I write the code which is easily readable, modern, clean and well-commented. Optimized for better performance, security and memory management. As of April 2013, I have total 3.4 years of experience as PHP Developer in Facing Solution in Jamnagar, IN. During this time I worked on several websites using PHP & CodeIgniter. I also made Android & J2ME apps for websites. I specialize in several programming languages. I have developed hundreds of desktop applications using C-Win32, VB and C#, firefox extensions+scripts using JavaScript and mobile applications+mods using J2ME. What I offer: • Web Development using PHP, CodeIgniter, JavaScript, jQuery, HTML5, CSS3, JSP, Servlets. • Web Scrapping from any site to MySQL, Excel, XML. Highly accurate and fast bot run on top of browser for data extraction. • Firefox, Chrome, Opera and Internet Explorer userscript extension/addon development using JavaScript. • Firefox extension/addon development using XUL. • Windows Software Development using C#, Visual Basic (6, .NET), C++ (Win32), C • Cross-platform Software Development with Java, Mono.NET. • Linux Software Development with Gambas2. • Mobile Application Development using Android, J2ME.

    $29.99 /hr
    985 hours
    5.00
  8. Vishal D.

    Vishal D.

    An independant Mobile Apps consultant

    India - Last active: 19 hours ago - Tests: 2 - Portfolio: 4

    Highly skilled mobile apps developer, specialized in iPhone/iPad , Android * Daily updates on work * Skype contact everyday for updates * After work support * Experienced complete mobile app development life cycle ( till app store submission) "you should continue with your style to ask questions and to question things you don't think is a good solution! It really make you stand out from your fellow countrymen!" - Thats what my clients say about me :)

    $16.67 /hr
    3,682 hours
    4.99
  9. Alessandro Z.

    Alessandro Z.

    Software engineer - Mobile Expert

    Brazil - Last active: 19 hours ago - Tests: 4

    I am a software engineer, with 5+ years of experience developing iOS (Swift and Objective-C) and Android (Java) apps, and also with a strong experience with Unity3D, developing 2D and 3D desktop/web/iOS/Android games, with 20+ games/3D applications shipped. I also have experience in the following areas: C, C#, Java, Swift, Objective-C, Javascript; Network communications, REST; SIP, PJSIP, Asterisk; Git, Subversion; Android, Eclipse, JNI, ActionBarSherlock; iOS, Xcode; Windows Phone; Unity3D, 2D Toolkit, NGUI, prime[31] plugins, native Unity3D plugins for both iOS and Android; Project management, testing; Linux, MacOS, Windows; Hope to talk to you soon, Thank you!

    $25.00 /hr
    134 hours
    4.87
  10. Jorge Ramos

    Jorge Ramos

    Senior Professional Outsystems Developer

    Portugal - Last active: 1 month ago

    Im a very experienced Software Engeneer and i have over 6 years of experience working with the Outsystems Agile Plattform. I've participated in several Outsystems projects, some of them in a teamwork environement, others as a standalone Developer. My experience goes from building just parts of applications to develop and maintain complete Applicational Environments. I've Worked in projects with Health, Education, Banking and Goverment Environments. Also i've worked to clients from Portugal, Angola, United States and Australia.

    $33.33 /hr
    99 hours
    4.94