Top Upwork Freelancers

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  1. Pavel K.

    Pavel K.

    Google Apps Script Expert Developer, JIRA Expert, SharePoint Expert

    Russia - Last active: 1 day ago - Tests: 10 - Portfolio: 2

    I have excellent skills in Google Apps Script developing. Also I have very good skills in SQL, Java and C++ programming. My experience in programming for more than 15 years allows me to bring exceptional value to my clients. My areas of expertise: - Google integration and Google APIs - Google Apps Script - Google Spreadsheet automation - Google Analytics - Google+ - Atlassian JIRA tuning and administration - In-depth JIRA programming with help of Groovy scripts/Java add-ons. - MS SharePoint tuning and administration. - SQL tuning. - Twilio API Also I hold MCITP: SharePoint Administrator 2010 certification. My key principles for job execution: 1) Honesty: I will not take a task if I am not sure I can complete it. 2) Availability: I can be accessed by Skype and phone. 3) Client satisfaction: My goal is to make you happy with my work. 4) Quality: I will create a fast and well organized code, which can be easily supported in the future.

    Groups: Coding Champs

    $30.00 /hr
    326 hours
    4.99
  2. Maya Milusheva

    Maya Milusheva

    Top 10 Mobile Game Developer

    Bulgaria - Last active: 16 days ago - Tests: 3 - Portfolio: 10

    I aim to create addictive and high quality games. Several of the games that I developed for clients got featured by Apple and I am in top 10 in the "Game Programming Concepts Test". I have deep knowledge in the whole process of developing and releasing a game and I always strive to educate my clients in all steps of the game development process so that we make a great product. I have experience with game logic, engine development, graphics programming and tools. My primary languages are C/C++ and Objective-C and I'm proficient in various iOS game engines, DirectX and GPU programming. oDesk has recognized me as one of their top Mobile Developers. See the badge on the right of my profile for more information.

    $38.89 /hr
    73 hours
    5.00
  3. Maksim B.

    Maksim B.

    PhD Unix Developer

    Russia - Last active: 3 days ago - Tests: 11 - Portfolio: 1

    Over the last 10 years I have worked on 1. Scientific software development (quantum chemistry) 2.DevOps (Chef, Vagrant, Jenkins, Docker) 3. Portable GUI programing (Qt, PyQt, PerlQT) 4. Server-side web development (python, Django, JavaScript) 5. Scraping and crawling of web sites (python, Selenium, Scrappy, BeautifulSoup, PyQt etc) 6. Unix administration (web servers, email, proxyes, deploying python and java webapps, bash shell scripting) 7. Building packages for Linux distributions (rpm, deb, tgz etc packages) 8. Encrypting data 9. Virtualization (KVM, VirtualBox, VmWare, Docker, AWS EC2 and S3, DigitalOcean) 10. Customization the Linux iso images for Debian/Ubuntu and Centos/Fedora, build own minimal live linux iso to load on clusters and for kiosks etc. I know the following languages: Python, Perl, BASH, Postable shell, Java, JavaScript, C/C++, Fortran (77/90/95/2003), Latex, HTML I'm a fan of Linux and programming. I always open for new areas of activity.

    $22.00 /hr
    596 hours
    4.84
  4. Roman Chernyak

    Roman Chernyak

    Android/iOS Developer

    Russia - Last active: 3 days ago - Tests: 4 - Portfolio: 2

    I specialize in Android and iOS app development. In addition my past projects also included working with complex UI with custom views and animations, web services and REST API's, Push notifications/Google Cloud Messaging, SQLite databases/Content providers, background services, synchronisation (Sync Adapters), and integration with social networks (Facebook, Twitter), billing and in-app purchases. I have experience in using GIT, different crash reporting and analysis tools like Crashlytics, Flurry, Crittercism. I have also successfully developed several mobile applications, among them Chess.com mobile app (as a team member) and Easy Call launcher app. My strong suit is experience in designing architecture of applications, choosing best suited technologies. I pay special attention to the code readability and expansibility. I like to produce good, bug-free code and software.

    $33.33 /hr
    1,861 hours
    5.00
  5. Serhiy C.

    Serhiy C.

    C# Developer

    Ukraine - Last active: 1 day ago - Tests: 4 - Portfolio: 2

    12 years experience working with .Net Framework and C# including: - windows forms - multi-threading applications - xml and xslt - Ado.Net - wpf - asp.net - MVC 3-4 (including Entity First) - silverlight - visual studio extensions (VSPackage) - encryption - xml webservices Also have experience with - Microsoft SQL Server 2005, 2008, 2012, Compact Edition - Customizations of Microsoft Dynamics CRM 2011 - MySQL - SqlLite - JavaScript and jQuery - Scribe - Android development - a little bit of Microsoft Azure and Amazon S3 clouds - a tiny bit of Unity 3D Something that was long ago but can be recalled if really necessary includes C++, Delphi 5.0-7.0, COM objects, Win32 API, a bit of OpenGL and DirectX

    Groups: Microsoft Certified Professionals

    $22.22 /hr
    3,231 hours
    4.91
  6. Sergey Shubin

    Sergey Shubin

    Expert .NET WPF WCF MVVM Developer

    Bulgaria - Last active: 1 day ago - Tests: 6 - Portfolio: 18

    Last 20 years I have been programming various kinds of software applications: from simple DOS programs to enterprise-level multi-tier applications. Started with developing C/C++ scientific software, I have moved to business application development and for last 14 years I'm using .NET platform for this purpose. I am a results-oriented developer with extensive experience in C#/VB.NET, WPF, MVVM, WCF, MS SQL Server, Windows Forms, Silverlight. In my work I always use a modern software technology and try to create solutions with the best price/quality ratio. Coding is my passion, and it's just as much fun now as it was when I got my first program to compile...

    $38.89 /hr
    1,484 hours
    4.97
  7. Dmitry S.

    Dmitry S.

    Web, Desktop Developement, Consultant 15+ yrs experience

    Ukraine - Last active: 2 days ago - Tests: 3 - Portfolio: 9

    Areas of Expertise: ✓ Gathering and Analyzing Project Requirements ✓ C#, ASP.NET, MVC 3/4, WebForms, Delphi 1-XE5/Pascal ✓ JavaScript, JQuery, Twitter Bootstrap, Ajax ✓ JSON, JSONP, XML, (D)HTML, HTML5, CSS ✓ Entity Framework, Linq2SQL, NHibernate ✓ MS SQL Server 2005-2012, MySQL, SQLite, Interbase/Firebird, SQL ✓ Crystal Reports, FastReport, QuickReport ✓ SVN, Git, CVS, Atlassian Jira ✓ SOAP, REST, HTTP(S), FTP, TCP/IP, POP/SMTP ✓ Google API, Facebook API, SMS Gateway, Payment Processor ✓ OOP/D, UML, SOLID, Design Patterns, TDD, Agile, SCRUM ✓ Visual Studio 2005-2012, Resharper, dotTrace, FXCope, NUnit, Log4Net

    $25.00 /hr
    1,492 hours
    4.83
  8. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 3 days ago - Tests: 2 - Portfolio: 6

    I am focused in VoIP field only and I have been working here for more than 8 years. My Area of experiences: VoIP -Asterisk PBX: Full proficiency -FreeSWITCH: Full proficiency -Yate: Full proficiency -Strong knowlege of SIP protocol and SIP routers/proxy servers -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVR and Auto Attendant Development -Secure VoIP: TLS, SRTP, ZRTP Full proficiency in free Billing/CDR solutions: -A2Billing: Full proficiency (configuration from scratch, customisation) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime stat for asterisk and freeswitch) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. I have successfully completed large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integration of various VoIP solutions into existing network environment. I also have experience in building of secure "bastion" VoIP/Linux servers. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -Fixed price projects are calculated based on the hourly rate and expected task complexity. -For all fixed price projects complete project specification with clear tasks description is required -For all fix price projects work will be started only after payment has been es-crowed and both parties have agreed with working terms.

    $55.56 /hr
    175 hours
    4.54
  9. Kyle L.

    Kyle L.

    HTML5/JS/.Net/SQL Developer, US based, 12 Years Experience

    United States - Last active: 6 days ago - Tests: 2 - Portfolio: 3

    Over the past 12 years I have developed numerous web and Windows projects for both internal and public systems. I have used primarly HTML5, Javascript, AJAX, Knockout.js, ASP.Net and SQL Server. I have more limited experience with PHP and MySQL. I am currently the CTO at Greenvelope.com and am the primary web application developer for Greenvelope's web-based formal invitations. Prior to that I spent 10 years at EBI MAP-Works where I was most recently was the Director of Information Systems overseeing a team of 7 developers. I was responsible for the completion of all software projects, from conception to delivery and beyond. My strengths are my knack for database design and my quick coding skill. My objective at oDesk is to use my skills and experience to spend some time each week doing fun and interesting projects. I hope to build an ongoing relationship with one or more employers.

    $55.56 /hr
    33 hours
    4.99
  10. Nikolay G.

    Nikolay G.

    Technical Lead (Java)

    Russia - Last active: 1 month ago - Tests: 8 - Portfolio: 2

    I'm an experienced Java programmer with solid principles in programming, architecture and code quality. I have a wide experience in Java-related technologies, so I can provide you high-level end product. I love to learn new technologies, frameworks etc, so research projects will be also interested for me. NOTE: If you are looking for bad quality, cheap, fast written code - do not distirb me, please. I'm not interested in working in a team which don't follow clean code, DRY and SOLID principles.

    $30.00 /hr
    1,037 hours
    4.86