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Regular Expressions Upwork freelancers typically receive a client rating of 4.80.

Last updated: October 1, 2015

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Ilya Frolov

Ilya Frolov

System Administrator and Web Developer

Russia - Tests: 7 - Portfolio: 6

I am php/golang developer and linux system administrator. Have an interest in all kind of web based programming technology like php, python, perl, golang . I have ability to create software from abstracts and fundamental algorithm design to deploying on production servers and zooming in business. I am interesting in golang, open source, secure networking (SSL and so on), servers maintenance. Prefer full circle development - from idea to full production server support! I like to learn and follow the most modern technologies. I have 5+ year of shared web hosting design and service.

$16.67 /hr
153 hours

Roman V.

Roman V.

Web developer

Russia - Tests: 12 - Portfolio: 12

Lately my work is about integrating Bitcoin-related functionality in websites or developing special purpose apps, like a bitcoin trading bot or a websocket chat. It involved various technologies: node.js, websockets, Ruby, Sinatra framework, API, PayPal API. During the years of my work prior to this I've performed a big variety of tasks in developing and reworking websites. This involved a lot of programming with PHP+MySQL, layout works with HTML+CSS, Javascript (with and without jQuery), AJAX. I had experience working with various CMSs: OpenCart, Joomla!, Wordpress, MODx Revolution, DataLife Engine, SimplaCMS, self-written websites. Also with different frameworks: MODx, Yii, also self-written MVC structures. I also use regular expressions (RegExp) fluently and have quite some experience with that. I've integrated a number of payment systems in several websites, which included PayPal, Bitcoin (native and via API) and russian WebMoney, Yandex.Money, QIWI, Robokassa. All payment processors utilize mainly same principles, so it's no problem to learn and integrate something new quickly. My work included creation of web grabbers and parsers that process information from external websites, for example to fill up an online store database. Also setting up and administrating Linux/FreeBSD VPS servers: installation and configuration of Apache, PHP, MySQL, Python and some other uncommon software. Aside from pure web, I've developed Python and Ruby scripts for various services. A part of that was developing Bitcoin-related services, including API communication with bitcoind daemon, automated receiving/sending Bitcoin payments, trading on BTC exchanges via their API, and other stuff. I'm looking for interesting work opportunities that would let me develop my skills and acquire new ones. Cryptocurrencies are especially interesting to me, but if it's not the case, no problem. Most likely I can be useful to solve your programming issues, so feel free to contact me.

100% Job Success
$40.00 /hr
483 hours

David B.

PHP/MySQL Developer Specializing in E-Commerce Platforms

United States - Tests: 9

Over the last 10 years, I have specialized in e-commerce. I got my start working on simple osCommerce installations. Since then, I have progressed to building and working with highly-customized and integrated platforms, becoming an expert in PHP/MySQL, HTACCESS, JavaScript, AJAX, jQuery, and XML. I have also had the opportunity to work extensively with many other frameworks and API's. I have a lot of experience with Google Adwords API, credit card and shipping interfaces, and numerous other external libraries. I enjoy challenge of optimizing applications for peak performance inventing new methods for automation, streamlining back-end operations, and providing custom analytics. I pride myself on being able to jump into a project quickly and to creatively solve nagging problems. Although I do have experience with HTML and CSS, I am in no way a designer. I am strictly a coder, and, simply put, I love my work. I have worked with over 180 clients on 275+ projects. Excellent communication skills and driven work ethic. I am a perfectionist, and I am not happy until the client is happy.

Groups: Application Developers Alliance

100% Job Success
$94.44 /hr
3,714 hours

Max Chechel

Max Chechel

Backend programmer with NFC experience

Russia - Tests: 1 - Portfolio: 1

Hi, I've been working in IT since 2003. I have worked mostly as a backend programmer and system architect for several e-commerce and mobile commerce startups that are well known in Russia and the post-Soviet space: * * * For these projects I have used PHP, C, Java, MySQL, Linux, Memcached, regular expressions, XSLT, SOAP and many other things. Three years ago I moved into the NFC world and since then I've been developing innovative payment and ticketing NFC services for a start-up company. One service is already in use and allows passengers of Moscow's "AeroExpress" trains to use their PayPass/PayWave bank cards: I developed a distributed system that includes: * Multithreaded servers for each train station that manages dozens of NFC readers and turnstiles and processes transactions in pseudo-realtime mode with delayed transaction authentication. * A central server that provides back office interface for tech support and accountants, collects logs and other information from station servers, and distributes black and white lists of cards across all stations connected to the system. Sometime ago I made a few minor commits to an opensource LibNFC library that made it possible to use it to communicate between a NFC reader and Mifare-enabled USIM cards and dual interface contactless smart cards with mifare functionality. I started to use Ruby as a main programming language in 2008. I should note that my Ruby experience is quite different from a great majority of ruby programmers; I use Ruby not only for Rails but also for communicating with different types of hardware using binary TCP-based protocols or serial ports. Rails are used mostly for creating backoffices (ActiveAdmin) and API web-services.

$18.00 /hr
11 hours

Andrii Andriichuk

Andrii Andriichuk Agency Contractor

Software Engineer (.NET; WEB; SOA; WCF; SQL Server; Delphi)

Ukraine - Tests: 4 - Portfolio: 14

I am a professional software developer. I work in this field for more than ten years. During my career I developed a set of desktop and web applications. At the moment I completed a major project and for that reason I am looking for work new project. I will be glad to start to work with you. I am able design and implement such things as architecture, security, data access layer, db structure, bussiness layer, caching and much more. Also I have good experience in SOA. WCF SOAP an d WCF REST I can work with both without any problems. Please contact me if you need any help of experienced programmer.

Groups: Central Desktop, Twilio

Associated with: DYNAMIC DEVS

100% Job Success
$50.00 /hr
4,803 hours

Aleksandar Hummel

Aleksandar Hummel


Croatia - Tests: 5 - Portfolio: 1

I'm an experienced and talented .NET/C# developer. Over the past four years I've worked on several enterprise applications. I highly regard quality in design of the application and the database, to promote flexibility and maintainability. I feel most at home developing client applications using C#, Windows services, and database design. In an ideal world, I'd be an agile developer and would use ORM, IOC and TDD. I am an ambitious and hardworking person who meets set goals. I am flexible and open to different ideas and perspectives. Team work is something I got quite used to. I am communicative and enjoy teaching others, and also am always looking for something new to learn.

$22.22 /hr
10 hours

Sarath M S

Sarath M S

Web developer guru with expertise in Elgg / Drupal / NodeJS

India - Tests: 4 - Portfolio: 1

I am a Generalist Programmer with special interest in developing web applications. I have expert level skills in Javascript, PHP, Python, C++ I have worked as Technical Lead in game development studios for about 3 years particularly working on mobile games with tools like Cocos2d-x. As a developer I also possess important skills in UNIX shell scripting, build scripts and version control systems like GIT and Mercurial. A very vocal advocate of Free and Open Source software.

$22.22 /hr
372 hours

Andrew S.

Andrew S.

Senior Software Developer

Australia - Tests: 6

I develop scalable, reliable, and secure applications using latest technologies. I provide professional, high-quality maintenance work and enhancements to existing software applications. In my previous roles I was leading a team of software developers based north of Sydney, Australia, working on desktop and web applications for finance professionals. I am now changing direction towards freelancing and self-employment, writing my own mobile phone applications and working on a contract basis with individuals and companies who have software/IT needs that I can meet. I am a highly-skilled professional, with excellent communication skills on both the business side and the technical side. I have well-developed time-management skills and have experience successfully delivering quality software solutions within required time-frames. I will work diligently and effectively for you, on any job for which I am hired. You will not be disappointed. Areas of Specialization: Web Scraping, Database Design, MVC Application Architecture, CRM, Code Optimization, Shell Scripting, Network Administration. High Proficiencies: C++, Java, XSLT, XPath, RegExp, SQL, Eclipse IDE, SOAP/REST Webservices.

100% Job Success
$80.00 /hr
1,183 hours

Mamunur H.

Mamunur H.

Zend Certified PHP fronend/backend developer, WP, Angular JS

Bangladesh - Tests: 8 - Portfolio: 15

Specialized in developing new and improving existing applications using the latest technologies, both in front end and back end since 2008. Satisfying client's needs is the main objective and I am doing that in cost-effective way. Available almost 18/7 for customer needs. Qualifications: PHP, Angularjs, ExtJS, JQuery, OOP, Yii, Laravel, Symfony, Zend Framework, Magento, Drupa, WP, MySQL/MSSQL Strong Knowledge of OOP(Object Oriented Programming) Strong knowledge in PHP, MySQL, HTML5, CSS3 Frameworks - Codeigniter, Yii, Zend Framework2, Symfony2, Laravel, Phalcon Ecommerce - Magento, Prestashop CSS Frameworks - 960 Grid System, Twitter Bootstrap, Jquery Mobile, YUI Pure Javascript Ajax Js Framework - Jquery, MooTools, AngularJS CMS - Joomla, Wordpress Ecommerce - Magento, Presta, opencart, OS Commerce Payment Gateway Security Management skill for web services and portals LAMP Development Linux administration/ Server setup/ Shell Scripting/ Server Security/ Cron Jobs Red5 Server Install and configure.

Groups: Crossrider

68% Job Success
$22.22 /hr
4,301 hours