Top Upwork Freelancers

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  1. Trimech S.

    Trimech S.

    Computer Engineer/ Senior Mobile (iOS and Android) developer

    Tunisia - Last active: 12 days ago - Tests: 3 - Portfolio: 4

    "Quality Service within deadline" I'm a mobile developer and i have managed and developed many iOS and android apps which run now on store successfully. • 3+ years of experience with Objective-C and the iOS platform • Excellent knowledge of the iOS SDK (Foundation, UIKit, Core Data,AVFoundation, MoviePlayer,Quartz Core,Core Animation, etc) • Extensive experience with implementing ad serving or ad network SDKs (iAds, Google admob, etc) • Knowledge of Facebook mobile SDK and open graph • Familiarity with SQL Lite and relational databases • Also i have expertise in iOS 7. • Map integration(GPS Location) /Google Map API, MapKit Framework • JSON/XML/KML Parsing, REST API • Chat App,... • Client/Server Communication ====> Please feel free to contact me.

    $30.00 /hr
    753 hours
    5.00
  2. Chalitha Wickramathilaka

    Chalitha Wickramathilaka

    Senior Backend Programmer / Tech Lead

    Sri Lanka - Last active: 18 hours ago - Tests: 2 - Portfolio: 15

    From almost 12 years I have been working with php based web applications. MVC, and Zend Framework 1/2 development environments. I have the same experience with java scripts /jQuery/extjs frameworks. I have more than 7 yrs experience on load balancing . Clustering , and replication over debian, centos and redhat systems. I use Oracle and mysql databases on most of my projects. As a code collaboration tool I am using Gforge with svn/git for my projects. also I have strong experience with iptv application such as tvguides, epg, music applications etc etc. I have been working on high loaded websites, application databases for my work. I have strong knowledge of optimizing web applications smooth run on a very high load. Also I have experience with hardware Visualization on VMware boxes. I have additional experience in ETL Jobs / Mysql clustering / Piranha / php heavy load balancing / caching nodes. Android / FB apps/ REDIS/VMware ESX configuration

    $33.33 /hr
    4,856 hours
    5.00
  3. 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
  4. Ivan S.

    Ivan S.

    Senior PHP/Zend/Phalcon Dev with HTML/CSS/JavaScript/jQuery experience

    Ukraine - Last active: 18 hours ago - Tests: 9 - Portfolio: 11

    I have almost 10 years of web-development and database administration experiences for various kinds of applications. I have extensive experience in database optimization. I focus on PHP, JS, MySQL, MongoDB. Over 9 years of IT working experiences with a proven background of technical problem solving. A self-motivated, reliable, responsible, and team player with a set of very strong technical skills. * Zend / Kohana Frameworks * Database design * Optimizing database performance * Ensuring security in the database * Ensuring the integrity of databases I have 8 years experience developing web based applications using PHP, Javascript, html and css.You can be assured of the quality of work and the usability. I participated in the creation of high-load systems (Hundreds of queries per second). I'll be glad to help you. Best regards, Ivan.

    $33.33 /hr
    4,845 hours
    5.00
  5. 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
  6. 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
  7. 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
  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. Monica Gerchinhoren

    Monica Gerchinhoren

    Mobile Developer and Tester

    Argentina - Last active: 1 day ago - Tests: 1 - Portfolio: 6

    I'm a System Engineer with 10 years of experience. Over the last 6 years I have developed and tested a wide reange of mobile applications in the main platforms iOS and Android. You can check my portfolio and my linked in profile ar.linkedin.com/in/monicagerchinhoren/ Y have several mobile devices phones and tablets I'm very responsible and proactive.

    $13.33 /hr
    1,008 hours
    4.75
  10. Sergey Shubin

    Sergey Shubin

    Expert .NET WPF WCF MVVM Developer

    Bulgaria - Last active: 18 hours 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
    1,485 hours
    4.97