roman davydov

Developing Perl based Web interface and Core for on-line VoIP Exchange project. Mysql, Perl, Php, Linux, SVN, JQuery, AJAX, Html, Css,...

* Managing team of engineers * New infrastructure of VoIP Call centre installation managing * IPT consulting and planning the full installation process of the new ZTE equipment * Intercommunication with vendors, engineers, managing team

* VoIP Solution Provider) Bishkek Branch of Rodicom.com, Kyrgyzstan Republic; Developing Billing Solution and Billing Module Structure (Perl, C++, PHP, Zend Framework, JavaScript, AJAX, ExtJs, HTML, CSS, JSON, MySQL) * Developing Utilities such as Rate Deck Comparer, System Analyzers, Parsers and others (Perl, C++, Java, MySQL) * Developing CRM system - client requests database with special usefully interface (Java, Glassfish, Mysql, Mssql, Oracle, JavaScript, ExtJs) * Responsible for supporting the IT structure of the company * Installing and Administrating Linux and Windows Servers (HP Proliant, Dell, iLO); Overseen of NOC Department Operations and day to day activities * Project load distribution such as www.rodicom.com; Migration Corporate Network on GB infrastructure

Participate in developing the "SmartJobBoard Project" - universal CMS System using for publish the sites for job operations. Customization of the system on request, creating addons and modules (PHP 5, Perl, MyQSL, Jira, SVN, Tomcat, Linux, HTML, Javascript, JQuery). Development of "Job Indexing and Search Engine Project" - using for grab and index job sites around the internet, store and update index data in local database (PHP 5, Perl, MyQSL, Lucene, Zend Framework, Regular Expressions). All projects released using following technologies - PHP, Zend Framework, Lucene, Zend Studio, HTML, Javascript, JQuery, Jira, Linux, MySql and; helpfull software During project was involved with PHP modular frame work, based on abstract inheritance. Creating subclasses of Zend abstract.

Developed a Billing System (radius module for Freeradius - C+ +, additional calculating scripts - Perl, web-interface - PHP, Perl, ExtJs, JQuery, HTML, CSS) , billing system used for transit VoIP traffic by different types of PBX Switches like Asterisk, Mera, GNUGK or Direct using by Cisco, AddPack and other equipments. Development of the "card platform for VoIP-telephony" a part of complex billing solution. Features: PIN authorization, DID authentication, 3 step call calculation, SIP device supporting, linking to different bill entries (PHP, Socket, Multithreading). Created an accounting module as part of billing, which allows conducting payments and collect statistics about subkonto of payment, used experience of "1C Enterprise" programming. During projects involved in writing APIs to work with payment system PayPal and Authorize.net. Developed APIs to work with Asterisk, FreeSwitch.

* Developing a database for recording user's applications and all types of connections - CRM system (Delphi, MySql, COM, Multithreading, Socket, and Stored Procedures). * Developing Web based report system by ISP data (PHP, HTML, CSS, JS, Linux, MySql) * Responsible for implementation of technical support phone numbers and equipment. * Provided set up and operation of various types of network equipment (voice gateways, modems, access points, etc.) including two-way satellite antenna broach optic cables, installing radio antenna Trango (broadband wireless).

Full stack development and architecture... to be updated some day...

* Linux engineering, installation, maintaining * Call center application development (Vicidial, Linux, MySql) * Web application backend development (PHP, Java, MySql, Perl, Bash) * Web application frontend development (Javascript, jQuery, CSS, HTML, Ajax) * Database development (Mysql, MSSQL) * Asterisk modules development (C/C++) * Application CTI module development for proprietary application (C#) * IVR development (Native Asterisk, Perl, PHP, Python) * RPM packages development (Bash) * Linux scripting (Bash) * Cluster systems installation/development (Corosync/Pacemaker) * Geo location Call-centers installations * Monitoring systems installation (Cacti, Nagios, Munin, Zabix) * Call recording systems development (Oreka, Web views) * Team communication, conferencing * Sangoma Lyra CPA/AMD solution integration * Environment: Linux, Asterisk, Vicidial, Clusters, Corosync, IVR, MySql, MSSql, Monitoring, PHP, Java, Python, Perl, C#, Symfony, Sangoma Lyra, Call center