Sergey Kotenko Email & Phone Number

Amsterdam

Kiev

* Fyxing and implementing features for frontend (Catalyst)* Implementing import of stock files in different formats* Creating scrapers for automatic data collection* General refactoring and bug-fixing.Languages: Perl, JavaScript, SQL, HTML, CSSTechnologies: Agile, Catalyst, Regex, DBI, DBIx::Class, SOAP, JSONSource version control: SVNDatabases: MariaDBOS: Linux

Kiev

Main project: Traders Reconciliation software* Performance improvements* Implemented “Release manager” - automation tool for creating releases* General refactoring and bug-fixing.Languages: Perl, JavaScript, SQL, HTML, CSSTechnologies: Regex, DBI, Websphere MQTools: CPAN, Mojolicious Source version control: Git, SVNDatabases: MS SQL ServerOS: Linux, SunOSIDE: vim, Komodo

Kiev

Main project: Corporate Issue Management system.* General refactoring and bug-fixing.* Improved transaction’s fraud control. Added functionality to automatically hold transaction with too high total amount in comparison to average amounts for similar production in past.* Fixed encoding problems for not-UTF8 systemis.* Improved “Edit issue by email” feature to use internal authentication and authorization rules.* Fixed many cross-browser CSS and Javascript issues (IE7-IE9, FF, Chrome).* Writing automated test scripts (Test::Harness).Languages: Perl, JavaScript, SQL, HTML, CSSTechnologies: Regex, DBI, Template Toolkit, XML-RPCTools: CPAN, FireBugSource version control: SVNMethodology: OOP, TDD, MVCDatabases: MySQLOS: LinuxIDE: vim, Komodo

Kiev

Main project: Payment system, Checkout, Affiliate network* Improved transaction handling to catch errors (timeouts, network problems) between checkout and processing systems (banks). Improvement increased number of successful transactions by 5%.* Improved transaction’s fraud control. Added functionality to automatically hold transaction with too high total amount in comparison to average amounts for similar production in past.* Refactored managers panel to use MVC framework and Template Toolkit templates.* Made internationalization of the project, changed WEB-templates, database and email notifications to utf8.* Refactored significant part of the code to feet “Perl Best Practice” style.Languages: Perl, JavaScript, SQL, HTML, CSSTechnologies: Regex, DBI, Template Toolkit, XML-RPCTools: CPAN, FireBugSource version control: SVNMethodology: OOP, TDD, MVCDatabases: MySQLOS: LinuxIDE: Komodo

Kiev

Main project: Project Danger (Backend for Side-kicks mobile phones)* Maintained Mail-module (Perl-daemons + CGPro mail server).* Optimized mail-module’s function of pushing mail headers to mobile phones witch increased speed by 60% (regex optimization).* Took part in Implementing and fixing NAB (Network Address Book) synchronization.* Fixed Multilanguage system email’s and notifications, improved template parsing.* Fixed templates of WEB-portal http://my.t-mobile.com related to NAB.* Added and improved (optimized) lots of SQL queries in DB-module – proxy between Oracle DB and other system components.Languages: Perl, PHP, JavaScript, SQL, HTML, CSSTechnologies: Regex, DBI, IMAP, Sockets, Template Toolkit, XML-RPCTools: CPAN, FireBugSource version control: PerforceMethodology: OOP, MVCDatabases: MySQL, Oracle DBOS: Linux, SunOSIDE: Komodo

Kiev

Main project: Domain names registrar * Developed the client-server application WhoisGateway with usage of parallelization (POE). Application increased speed of processing WHOIS-queries in more than 20 times without blocking by IP-address.* Uploaded developed from scratch modules to CPAN:http://search.cpan.org/perldoc?Net::Whois::Gateway::Clienthttp://search.cpan.org/perldoc?Net::Whois::Gateway::Serverhttp://search.cpan.org/perldoc?POE::Component::Client::Whois::Smart* Fixed lots of layout bugs of the portal http://reg.ruLanguages: Perl, PHP, JavaScript, SQL, PL/SQL, HTML, CSSTechnologies: Regex, DBI, CPAN, Sockets, Threads, Forks, POE, Template ToolkitTools: CPAN, FireBugSource version control: SVNMethodology: OOP, Prototyping, TDD, MVCDatabases: Oracle DBOS: LinuxIDE: KomodoWEB-Servers: Apache2, Nginx

Kiev

Main project: real estate consultant's web-sites and DBs* Refactored web-portal http://utg.kiev.ua* Developed web-portal http://develop.com.ua* Projected and made DB-application for maintaining real estate market’s informationLanguages: PHP, JavaScript, SQL, HTML, CSSSource version control: SVNMethodology: OOP, MVCDatabases: MS AccessOS: MS WindowsWEB-Servers: Apache2

Kiev

* Integrated lots of brand-oriented DBs into one central corporate DB.* Developed accounting system for repairs, orders and in-stock spare parts.* Created tools for automatic generation of spare parts orders and repairs reports, statistic reports.* Made tool for automation of technical documentation’s updates from the internet.Languages: Perl, JavaScript, SQL, HTML, CSSTechnologies: Regex, DBI, ODBCTools: CPAN, FireBugMethodology: OOP, PrototypingDatabases: MySQL, MS AccessOS: MS WindowsIDE: KomodoWEB-Servers: Apache2