GCP Cloud Run UI Experience team:- Team Lead for a group of 5 engineers- Forming a product technical development strategy- Collaborated with leaders of Google Cloud teams to align technical vision (frontend, backend, artificial intelligence)- Worked closely with the product team to refine requirements and plan development stages- Designed product architecture- Approved all team design documents- Successfully launched the product, featured in the keynotes at Google Cloud Next 2024 and highlighted in four conference talks

Department of Information Security at Institute of Physics and Technology

Responsibilities and Key Accomplishments:- Have grown the company 50 to 140 staff- Signed contracts with 3 more companies from the Fortune 500 list.- Have scaled delivery and software development processes to meet the requirements of enterprise customers. - Have developed knowledge/skills baseline for all developers at WebbyLab. Now part of the onboarding process. - Have developed new areas of expertise in WebbyLab: IoT Smart Home automation, blockchain infrastructure.- Participating in software architecture development for most critical projects.- Communicating with customers to clarify what they want and to offer the best technical solutions. Composing technical and financial offers for clients.

Responsibilities and Key Accomplishments: - Have grown the company from 2 to 50 staff since 2011 as the company co-founder. - Managing multiple projects and development teams (up to 10 people per each team). Have successfully accomplished more than 50 projects (ReactJs, React Native, NodeJs, NLP, Hadoop, Perl etc) . - Have developed system architecture for 15 long-term (15-35 months) and more than 30 short-term (2-10 months) projects. - Communicating with customers to clarify what they want and to offer best technical solutions. Composing technical and financial offers for clients. - Writing code for most critical projects subsystems. - Optimizing development processes. - Optimizing technical staff hiring processes. - Have mentored more than 40 junior and mid-level developers. Conduct regular trainings for web-developers.

Responsibilities and Key Accomplishments:- Communicating with customers to clarify what they want and to offer best technicalsolutions. - Have created the architecture of a natural language processing engine for quizzes generation.- Technical staff hiring.- Manage technical team.- Writing code for most critical projects subsystems.

Perl modules author ("koorchik" - http://search.cpan.org/~koorchik/ )My modules on CPAN:- Validator::LIVR - Lightweight validator supporting Language Independent Validation Rules (LIVR)- Debug::LTrace - Perl extension to locally trace subroutine calls- DLM::Client - Linux DLM(Distributed Lock Manager) Client- Lingua::UK::Numbers - Converts numbers to money sum in words (in Ukrainian hryvnas)- LIVR::Contract - Design by Contract in Perl with Language Independent Validation Rules (LIVR).- Rose::DBx::Role::NestTransaction - Nested transactions support for Rose::DB- Mojolicious::Plugin::BindSessionToIP - Binds your Mojolicious session to IP-address- Mojolicious::Plugin::ChromeLogger - Pushes Mojolicious logs to Google Chrome console- Mojolicious::Plugin::CSRFProtect - Fully protects you from CSRF attacks- Mojolicious::Plugin::Gravatar - Globally Recognized Avatars for Mojolicious- Mojolicious::Plugin::HTMLLint - HTML::Lint support for Mojolicious- Mojolicious::Plugin::JSUrlFor - Mojolicious "url_for" helper for javascript- Mojolicious::Plugin::RemoteAddr - an easy way of getting remote ip address- Mojolicious::Plugin::RenderFile - "render_file" helper for Mojolicious- Mojolicious::Plugin::ValidateTiny - Lightweight validator for Mojolicious

Responsibilities and Key Accomplishments: - Teach "Advanced frontend" course

Responsibilities and Key Accomplishments:- Porta Billing engine development and optimization- Monitoring tools support and optimization- Have sped up Porta-Monitor view (shows monitoring data from thousand of servers) in 20 times- Porta Switch disaster recovery ( problem analysis and solution plan )

Responsibilities and Key Accomplishments: - Led system-level team of 3 people. - Server infrastructure: design, optimization, support. - Have improved webmail and system-level interoperability. - Have rewritten system components and webmail to use a single distributed storage layer. - Have covered the whole distributed storage layer with integration tests.

Responsibilities and Key Accomplishments: - Led the webmail-level team of 5 people. - Have developed webmail code architecture. - Have developed distributed storage abstraction layer. - Have provided new more effective release management and deployment scheme whichmade product releases more stable and predictable. - Trained above 10 interns. - Have significantly improved web-framework: implemented requests dispatcher, sessionmanagement, FCGI workers management. - Have written application deployment utilities.

Responsibilities and Key Accomplishments:- Creating fully AJAX Webmail with Javascript on client side and Perl on server side. - Writing different Jquery plugins- Have written most critical javascript component - grid with virtual scrolling(no pages), fully AJAX, configurable and can easily manage more than 1 million rows. The grid is used for every list data including (mail messages list, contacts lists, invites list, filter list etc)

A head of network administrators in the dormitory of Taras Shevchenko Kyiv National University (volunteer), afterwards in charge of whole campus network.Responsibilities and Key Accomplishments:- Network administration (L2 switches, Linux based servers)- Writing Perl script for L2 switches management through telnet interface- Network laying- Management of 4 subordinate administrators - Have created from scratch network with over than 200 PCs

Responsibilities:- Network administration- Workstations administration- Office equipment configuration

Responsibilities and Key Accomplishments:- Analyzing different security solutions ( Public Key Infrastructure, Security Audit )- Have achieved status of “Microsoft Certified Professional”- Accomplished training “Windows 2000 Server Administration”- Accomplished training “Windows 2000 Server: Active Directory Management”- Accomplished training “Managing Windows 2000 Network Environment”