Top Upwork Freelancers

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  1. Chalitha Wickramathilaka

    Chalitha Wickramathilaka

    Senior Backend Programmer / Tech Lead

    Sri Lanka - Last active: 1 day 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
    4,866 hours
    5.00
  2. Sergey Malinka

    Sergey Malinka

    FrontEnd, iOS , Xcode , Objective-C , UI/UX, PhoneGap , iPad , iPhone

    Ukraine - Last active: 6 days ago - Tests: 15

    I am a highly-qualified mobile apps developer (Bachelor`s Degree in `Computer Systems and Networks`) with more than 6 years of experience in websites and mobile apps development. More than 120 applications, currently are successfully sold in AppStore - speak for themselves. I took part in more than 200 medium size projects, which were successfully completed. These projects involved writing code in different programming languages using the latest mobile technologies and programming patterns. I can offer you flexible mobile apps development pricing, depending on your business needs. So, you can be sure you will get professional mobile apps development services on the reasonable terms and at reasonable prices. Skills: • Mobile iOS apps development for iPad; • Mobile iOS apps development for iPhone; • Mobile iOS apps development for iPod touch; • Website Development (WordPress, PHP, Smarty, HTML, HTML5, CSS, CSS3, MySQL, JavaScript, Ajax, Website QA); • Web development (Web programming, Web testing, Web content management, Web os app development, PHP, Smarty, HTML, CSS, MySQL, JavaScript, Ajax); • WordPress (WordPress PHP, WordPress HTML5, WordPress HTML, WordPress CSS3); • MySQL (MySQL PHP, MySQL JavaScript, MySQL jQuery); • PHP (phpmyadmin, phpmydirectory, PHP4, PHP5, Smarty, PHP WordPress, PHP JavaScript, PHP MySQL, PHP HTML5); • HTML (HTML, HTML5, HTML CSS, HTML5 CSS3, HTML5 PHP, HTML5 WordPress, HTML5 JavaScript); • JavaScript (JavaScript PHP, JavaScript jQuery, JavaScript HTML5, JavaScript HTML); • CSS (CSS3, CSS HTML, CSS HTML5, CSS PHP); • Frontend Development(Frontend Development HTML5, Frontend Development CSS3, Frontend Development JavaScript, Frontend Development Jquery); • iOS, OS X; • Objective-C; • Xcode; • PhoneGap(PhoneGap PHP, PhoneGap HTML5, PhoneGap JavaScript); • Jquery, JqueryMobile; • UI/UX, Human Interface Guidelines; • Apps testing; • Twitter-bootstrap; • XML; • Translation-english-russian; • Translation-russian-english; • Translation-english-ukranian (translation-english-ukrainian); • Translation-ukrainian-english (translation-ukranian-english); ADDITIONAL INFORMATION: Can use special project management software (JIRA) if necessary. Samples of my work can be found in the portfolio: http://krasnostup.com/our_apps/our_apps_en.html My strong skills included: mobile-app-development, jquery-mobile, iphone-app-development, iphone-ui-design, ipad-ui-design, ipad-app-development, objective-c, document-object-model, apple-xcode, jquery, mobile app development, jquery mobile, iphone app development, iphone ui design, ipad ui design, ipad app development, objective-c, document object model, apple xcode, jquery, iPhone, iPad, iPod touch, iOS, PHP, PHP4, PHP5, Smarty, PHP WordPress, PHP JavaScript, PHP MySQL, PHP HTML5, JavaScript, JavaScript PHP, JavaScript jQuery, JavaScript HTML5, JavaScript HTML, PhoneGap, UI, UX, XML, HTML, CSS, Twitter-bootstrap, MySQL... To evaluate my skills, please contact me.

    $28.00 /hr
    162 hours
    4.43
  3. Denis Sazonov

    Denis Sazonov

    Java/Swift/Objective-C/AS3 Developer

    Russia - Last active: 1 day ago - Tests: 5 - Portfolio: 9

    I love strict, clean code with well designed architecture. Such code is a key for further success of any project. Modern frameworks and technologies, powerful code design patterns. It's terrific to create such projects, to maintain them after, to support!!! I can work with Java, Python, Swift, Objective-C, AS3 languages, Adobe Flex/Air technologies. MySQL, PostgreSQL databases. SVN,GIT,HG, Intellij products, Eclipse, Flash Builder. about me: http://saden.me. Please contact me if you need additional information.

    $22.00 /hr
    6,658 hours
    4.66
  4. Bogdan Ribic

    Bogdan Ribic

    Software and Web Development

    Serbia - Last active: 20 days ago - Tests: 8 - Portfolio: 1

    I am an experienced programmer and web designer, with skills in many popular and classic programming languages and technologies. I've been writing code since mid-eighties starting with ZX Spectrum via Amiga to modern PCs, in languages from Z80 assembler to C++/Java. I take pride in my work, I catch on quickly, love what I do and will always go the extra mile to get the job done well. Skills: My skill set is predominantly in code-writing and related areas. Programming languages: - C/C++, PHP, Java, Javascript, Delphi, C# and to an extent VB.NET. Also classic languages like Fortran and VB6. - Web Design and related: ”classic” web design, AJAX, twitter bootstrap, xhtml, excellent knowledge of jQuery and related libraries, backbone.js, javascript-based unit testing. - Software Engineering: Familiar with agile test driven development, UML, Refactoring, Extreme programming, able to organize the code for easy readability and expandability. Personally subscribe to “clean code” school of programming by Robert Martin (aka Uncle Bob). I am familiar with Scrum, Kanban, Atlassian JIRA and related methodologies. - Databases: General and advanced SQL, excellent knowledge of MySQL including replication, table partitionning and schema optimization. Also PostgreSQL, sqlite and desktop based database engines like MS Jet engine and Borland BDE. - System administration: Intermediate linux / windows sysadmin skills, good knowledge of Apache web server administration, mod_rewrite. Education: Junior college, informatics divison in Novi Sad, Serbia (Visa poslovna skola, odsek informatika) Two years of mechanical engineering faculty in Novi Sad (FTN, masinski odsek), dropped out. High school of mechanical engineering in Novi Becej. Work History: In the beginning I worked as freelancer on small projects in various languages or via freelancer sites. After I established my skill set I went for more permanent employment. I worked for thinking stone (creators of mod_security) on a php bug tracker but project was abandoned and (after they were acquired by breach.com) on mod_security itself - C programming of apache modules, tricky implementation of Aho-Corasick parallel string-matching algorithm in pure C. Later I worked for nsolve, a UK based small software company making software for phone answering services, work involved C++ programming using Borland C++ Builder. Worked several years for Beano Publish from Florida as PHP developer,. Worked involved billing and payment processing via NetBilling and related reports, frontend and backend functionality about profile matching. There was also work for small UK e-publishing firm, involving Java server-side programming with custom Java web framework, using MyBatis, Apache Velocity and a host of other frameworks, notable section was AJAX-based epub-reader. Worked on crowdcut.com, clone of groupon.com in backend and frontend areas, reports and shop configuration. Developed lead optimization and delivery system leadwrench.com from scratch for clients from California. System is able to track and deliver leads (basically HTML form submission) to a configurable list of tartget sites, after processing to format expected by those sites, re-deliver if one of the sites rejects etc. Worked for Swedish company ABC Gruppen (formerly estate europe) on web-based order configuration system, an engine for enforcing rules about the order (A must go with B but cannot go with C, or else D goes for free). System includes identical implementation of same rules engine in frontend and backend (javascript and PHP), and editor for configuring the rules in admin section. Interests: Current affairs, history of Europe, psychology, cognitive science, robotics, exciting new technologies like nanotechnology & genetic engineering... and sci-fi, of course. Other: Member of Mensa since 2004.

    $30.00 /hr
    3,251 hours
    4.65
  5. Trimech S.

    Trimech S.

    Computer Engineer/ Senior Mobile (iOS and Android) developer

    Tunisia - Last active: 16 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
  6. Kerwin Ang

    Kerwin Ang

    IOS Developer, Netsuite Consultant, C#.Net Consultant, SQL Consultant

    Philippines - Last active: 4 days ago - Tests: 7 - Portfolio: 7

    6 Years in Software Development Over 3 years of Netsuite ERP, CRM, Website, Scripting Consulting. - Netsuite API (Server and Client), Webservices(PHP, JAVA, C#), Workflow - Reference Cart, Checkout Development, My Account, ShopFlow, customizations and development (from scratch and enhancements) - Netsuite Form Customizations, and others - Netsuite Implementation and Migration - Saved Searches - SEO Optimization - HTML Email template compatible for all mail servers - Website Template creation, SSP Applications. Javascript framework - backbone MVC, underscore, require, templates, common.js, bootstrap, jquery, JSON Over 2 and a half Years in C# development and support - WPF, Sharepoint, ASP.Net MVC 5 , Winforms Over 2 and a half Years of MS SQL development 1 Year in IOS development with 2 apps in the apps store Programming Skills - C#, C++, JAVA, SQL, TSQL, PLSQL, Javascript, JQuery, JSON, Lua, IOS3.5-7, PHP, CSS3, HTML5, Google API

    Groups: AspDotNetStorefront

    $42.00 /hr
    2,098 hours
    4.81
  7. Maya Milusheva

    Maya Milusheva

    Top 10 Mobile Game Developer

    Bulgaria - Last active: 4 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
  8. Ivan S.

    Ivan S.

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

    Ukraine - Last active: 2 days 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
    4,858 hours
    5.00
  9. 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
    332 hours
    4.99
  10. Kyle L.

    Kyle L.

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

    United States - Last active: 10 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