Контактна інформація

Шукач вказав телефон та ел. пошту.

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Досвід роботи

Head of Production (L2/L3)

з 06.2018 по 04.2024 (5 років 10 місяців)
Survey Software Services/Keysurvey/Worldapp/FORM COM, Київ (IT)

Successfully restructured the Sysadmin and Engineering departments into three
specialized teams (L2, L3), while transitioning office maintenance and HelpDesk
functions to a dedicated department for improved operational efficiency.
Prepared production infrastructure and management processes to meet the
stringent requirements of ISO27001 certification. Took a part in projects to
ensure ongoing ISO compliance.
Redesigned and implemented a cost-effective hosting solution tailored to the
growing needs of development and testing teams, ensuring scalability and
resource optimization.
Assembled and led a team, personally contributing to project execution, to
complete critical projects under tight deadlines and resource constraints.

Infrastructure Architect

з 04.2015 по 06.2018 (3 роки 2 місяці)
Survey Software Services/Keysurvey/Worldapp, Київ (IT)

Designed and implemented a robust disaster recovery solution for a client's
distributed system, spanning two data centers with data replication and rapid
failover process.
Optimized the data center’s storage system by reorganizing the SAN
infrastructure and restructuring virtual machine and user data placement.
Improved backup strategies by migrating from traditional snapshot backups to
data replication for greater efficiency and reliability.
Led the effort to split and rebuild infrastructure clusters based on their specific
purposes, enhancing operational performance. Actively contributed to the
architectural team tasked with transforming a monolithic application into
microservices.
Worked closely with decision-makers across various departments to identify,
recommend, and implement cost-effective technology solutions that align with
business needs and objectives.

Infrastructure Architect and Head of IT/Infrastructure department

з 07.2014 по 04.2015 (9 місяців)
WNB LLC, Київ (IT)

Established and managed a team of system administrators/engineers,
overseeing task assignments and providing hands-on supervision to ensure
efficient operations.
Developed comprehensive technical documentation for production systems. Led
efforts to prepare office security and production infrastructure for PCI DSS
certification, ensuring compliance with regulatory standards, and finally passed
PCI DSS certification.
Collaborated with the Development Lead to redesign and optimize the transaction
log subsystem, a critical component, significantly improving transaction speed
and response times for alerts.
Implemented network security by integrating CERT for Wi-Fi access, ensuring
secure authentication and concealing configuration settings through a profiler on
user devices. Enabled seamless transition between Wi-Fi access points across
multiple office locations within the same building, as well as between Wi-Fi and
Ethernet connections.

Head of IT/Infrastructure architect

з 12.2012 по 07.2014 (1 рік 7 місяців)
EggmenGroup LLC, Київ (IT)

Established and led a team of system administrators, overseeing task
assignments and providing guidance to ensure efficient operations. Prepared
technical documentation and contributed to the technical sections of project
proposals for tenders. Collaborated with the legal department to draft and finalize
client service agreements.
Led the development and implementation of projects aimed at optimizing
performance and security across production systems. This included designing
and deploying distributed media delivery systems (basic CDN), web clusters, load
balancers, NFS failover solutions, traffic balancers, and backup systems.
Personally participated in these projects, ensuring enhanced system stability,
performance, and security through isolated environments.
Set up and optimized online streaming service based on Flussonic/Erly video,
Nginx (RTMP/HLS/DASH) and Varnish, ensuring seamless media delivery and
improved user experience.
Tuned critical system components during periods of high load, including Nginx
web servers, PHP/APC, MySQL (InnoDB), and NFS. Identified performance
bottlenecks and actively participated in implementing solutions to enhance
system efficiency.
Developed and configured a distributed storage system based on ZFS, capable
of handling 100TB of data as of 2013. This system provided CIFS/SMB and FTP
services to customers, ensuring reliable data delivery and storage.
Promoted the adoption of isolated environment technologies (zones) and ZFS file
systems, contributing to the evolution of infrastructure and storage solutions.

Unix/Solaris administrator

з 01.2008 по 12.2012 (4 роки 11 місяців)
Infopulse Ukraine LLC, Київ (IT)

Managed remote server hosting for over 2,000 accessible servers, including the
installation of clusters, setup of various applications as clustered resources,
environment creation and migration (hardware servers, LDOMs, zones), and
optimization for application performance. Performed hardware maintenance on
Sun servers.
Developed and implemented tools for server management using shell scripting,
Perl, PHP, and JSP with MySQL/SyBase databases. These tools included
inventory management, statistics collection, monitoring, and additional utilities for
proprietary systems.
Installed a syslog proxy and configured a central syslog storage for a new
systems.
Prepare POC for migration from AIX (Tivoli) LDAP to Oracle Directory Server,
ensuring compatibility with RHEL 5/6 and AIX clients.
Resolved complex technical issues at the L3 support level and served as the
Process Manager for Configuration Management.

Head of IT/Production departments

з 05.2005 по 12.2007 (2 роки 7 місяців)
SurveySoftwareServices/Keysurvey/Worldapp, Киев, Breintree (IT)

Led a team of system administrators, overseeing task assignments, and ensuring
project timelines were met. Developed and maintained technical documentation
for the production environment and provided responses to RFIs from
customers(pre-sales stage).
Developed and managed optimization projects using MS Project to improve
performance, stability, and security of production systems. Key initiatives included
creating a cascade mail delivery system, optimizing web clusters, implementing
Tomcat load balancers, setting up NFS clusters, and deploying failover solutions
for routers and firewalls. Additionally, implemented security measures such as
web HIPS (mod_security). Actively supervised project execution and participated
directly in their implementation.
Fine-tuned critical systems under heavy load, including MTA Sendmail, MySQL
with InnoDB, Apache web servers, and Java for Tomcat with large RAM
configurations. Worked to identify and resolve bottlenecks, ensuring peak system
performance.
Configured a mass mail delivery system capable of handling large customer
mailing lists (capable of sending about 2 million letters per day), optimized for
compatibility with major email providers like Gmail, AOL, Hotmail, and Yahoo.
Implemented isolated environment technologies (zones) and ZFS file systems,
facilitating advancements in server architecture and storage management.

System Administrator/SRE

з 11.2004 по 05.2005 (6 місяців)
Intercollab, Киев (IT)

Managed both remote and local server hosting environments, including Apache
web servers, Tomcat application servers, and database servers (MySQL,
PostgreSQL). Ensured smooth operation and availability across diverse hosting
platforms.
Configured and maintained mail servers (virtual domains), DNS, and FTP
services for company clients. Set up and monitored alert systems using Nagios to
proactively address issues and maintain service continuity.
Optimised OS, JVM, Tomcat, Apache, and database management systems
(PostgreSQL, MySQL) to handle high-traffic scenarios. Focused on performance
tuning and system stability during peak load times.
Resolved issues related to Java-based applications crashing under heavy load by
identifying performance bottlenecks and implementing stability improvements,
ensuring consistent application performance.

Head of IT and Tech Departments

з 10.2002 по 01.2003 (3 місяці)
Научно-производственное предприятие “Информационные Технологии и Электронные Комплексы”, Чернигов (IT)

Oversaw IT department. Performed initial accounting, inventory management,
equipment procurement, and repairs for the main office and branch locations.
Installed network services and coordinated with other departments to ensure
smooth integration of IT solutions.
Installed and maintenance of the telephony system at the main office, including
PBX, ISDN-PRI, FPA, and cross-connect systems. Ensured reliable
communication with external facilities by configuring phone number routing and
ISDN-PRI transit.
Contributed to a project aimed at creating a dedicated workplace for telephone
channel testers by splitting PBX software to run on a separate system, enhancing
testing efficiency and performance.
Cost-Effective Internet Solution Implementation
Introduced a cost-effective, high-performance Internet solution for the main office
by implementing xDSL multilink technology, optimizing both speed and budget.
Government and Branch Network Development
Participated in the development of network infrastructure for government
organizations and the branch office access network, ensuring secure and efficient
communication channels.

System and Network Administrator

з 06.2000 по 10.2001 (1 рік 4 місяці)
Научно производственное предприятие “Информационные Технологии и Электронные Комплексы”, Чернигов (IT)

Oversaw the HelpDesk administrator, ensuring effective support and issue
resolution. Managed the setup and maintenance of local servers, including mail,
antivirus, antispam, web, CVS, FTP, Samba, and MICS servers.
Administered local networks and remote workplaces, including the installation
and management of office and system software. Monitored and ensured the
efficiency of these systems to support smooth operations..
Implemented measures to protect network and server infrastructure from
unauthorized access and virus attacks, enhancing overall security and reliability.
Developed and executed corporate network projects, including DMZ
implementation, local network reorganization at the main office, and establishing
remote workplace access. Coordinated with the hardware department for project
execution.
Participated in collaborative efforts with Ukrtelecom to expand internet access
using xDSL (Sirius-128) equipment.

Освіта

Черниговский Технологический Институт

Компьютерные системы и сети, Чернигов
Вища, з 1995 по 2000 (4 роки 9 місяців)

специалист

Додаткова освіта та сертифікати

Course: Construction and operation xDSL «Sirius 128» equipment

2001 Dec., 1 month

Course: Specialist Maintenance Systems SI2000ME

2003 Aug., 1 week

Sun certified system administrator for Solaris 10 OS

2009, Sep.

Course: Sun xVM Ops Center

2009, Nov., 1 week

Course: Sun Cluster 3.2 Administration

2009 Dec., 1 week

Certification: Sun certified system administrator for Sun Cluster 3.2

2010, Jul.

Certification: Oracle Solaris 10 Network Administrator

2012, Jan.

Знання і навички

• BSD
• Communicability
• Database
• Firewall
• HTML
• Iptables
• LDAP
• Linux
• Email
• MS SQL Server
• MySQL
• Nginx
• MS Office
• Oracle Database
• Operating systems
• Perl
• PF
• Postfix
• PostgreSQL
• Programming
• Sendmail
• Shell
• Solaris
• SQL
• Apache Tomcat
• Virtualization
• VMware
• IT engineer with wide experience with Unix servers.
• Team management
• Project management
• Project planning
• HAProxy
• Docker Compose
• Scrum
• Kanban
• Hyper-V
• Disaster Recovery

Знання мов

• Англійська — вище середнього
• Українська — вільно
• Російська — вільно

Додаткова інформація

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