• ag@sycraft.info
  • ag_2278
  • @sycraft_fl

Aleksey Zhadan

senior system administrator

Linux, FreeBSD, Galera / Percona Cluster (MySQL), MongoDB, PostgreSQL, Redis Cluster, Cassandra, Elasticsearch, RabbitMQ, ESXi, Xen, KVM, LXC, VZ, Virtuozzo, Proxmox ZFS, Ceph, GlusterFS, Virtuozzo Storage, OCFS2, DRBD Ansible, Saltstack, Zabbix, Monit, Haproxy, Keepalived.

City: Stavropol - Moscow

Date of birth: January 25, 1986

I work in IT for 14 years. MediaMarkt, Acronis, Rambler&Co, and EPAM.

I use ITIL practices.

Services

Maintenance and monitoring

projects of any complexity

from 1500 rub
order

Server
setting

selecting the configuration and setting the environment

from 5000 rub
order

Speeding-up
a website operation

by all indicators

from 3000 rub
order

Other
administering tasks

from 900 rub
order

Increasing security class of an HTTPS site

от 2000 rub
order

Site audit
(audit of software and hardware of the site and server)

from 1000 rub
order
01
Work experience

08 / 2017 — present

Team leader

Live Linux LLC

Livelinux has emerged in a circle of IT-experts, engaged in installation, configuration and support of web-servers running various web-applications.

03 / 2015 — 8 / 2017

Senior System Engineer (MySQL DBA)

EPAM Systems

Administrator of UNIX / Linux, MySQL with extensive production experience. Support and development of the Percona cluster. Solving problems related to MySQL. Assistance in optimizing and ensuring the availability of zabbix monitoring.

11 / 2014 — 02 / 2015

Unix System Administrator

Rambler&Co

top100.rambler.ru support system and elimination of problems related to FreeBSD, ZFS, Nginx, MySQL, Apache2, MySQL. Solved current tasks with Jira.

06 / 2013 — 11 / 2014

Senior System Administrator

Acronis inc

Independently migrated all Linux web-systems of the company to a highly available fault-tolerant architecture. Organized a high-performance configuration of zabbix-server based on Сentos (nginx, php-fpm, apc, mariadb) and a variety of zabbix-proxy all over the world to monitor all IT servers in the company (about 500 servers). Updated sites on the Drupal engine, optimized the speed of work, provided a transition from apache2 to nginx+php-fpm. Optimized to work with multi-master database clusters.

10 / 2012 — 06 / 2013

Linux Web Administrator

ООО CE Trading Solutions (Media-Saturn-Holding GmbH Russia), (Moscow, 003.ru)

Migrated all of the company's web-systems to a new high-availability architecture. Implemented a horizontally scalable architecture based on: Frontend: nginx (upstream+cache), keepalived, monit; Backend: nginx+php-fpm, monit; RPC: haproxy + keepalived, garbd, monit, memcached; DB: MariaDB Galera 10 + shpinx_engine; Search engine: Sphinx.

06 / 2011 — 09 / 2012

Head

YUG-TST LLC (Stavropol, ugct.ru)

Duties of the head of web-studio, creation of payoff and self-financed organization. Creation and development of regional information and entertainment site of Stavropol city.

10 / 2008 — 09 / 2012

Head of information technology department

"ATV-MEDIA" HOLDING (Stavropol, atvmedia.ru) — mass media, Stavropol

Organization of uninterrupted operation of computer equipment of the enterprise (about 120 workstations in 2 cities, 17 organizations). Provision of uninterrupted advertising display on 5 TV channels. Provision of airing of the "REN-Stavropol" TV channel and airs on 4 radio stations. Servicing 2 movie theathres.

Education

2008 г.

North-Caucasian Social Institute, Stavropol. Major: Information service specialist

Higher

WORK TOWARDS RESULTS

I work on a post-payment basis. Pay only after acceptance of the work.

IN TOUCH 24/7

You can reach me 24 hours a day and 7 days a week

MORE THAN 0 REVIEWS

More than 50 positive reviews on freelancing sites

Extensive work experience

14 years of
experience
in this field

Cases
1

Case №1. Speeding-up a site based on Bitrix

Task: speed up the site and reduce resource consumption. It was decided to transport the site to our SSD hosting.

Architecture: Architecture: nginx + Apache + php-fpm + opcache. The Bitrix recommendations were fully implemented and all internal tests were passed.

2

Case №2. Speeding-up a site based on WordPress

Task: speed up the site and reduce resource consumption. It was decided to transport the site to our SSD hosting.

Architecture: nginx + php70-fpm + opcache + mariadb. The database has also been optimized, internal caching has been configured, site sessions have been migrated to memcached, the nginx pagespeed module, module for code optimization have been activated.

3

Case №3. Increasing security class of the HTTPS site to A+

Task: speed up the site and reduce resource consumption. It was decided to transport the site to our SSD hosting.

Architecture: nginx + Apache + php-fpm + opcache. The Bitrix recommendations were fully implemented and all internal tests were passed.

02
cooperate on a permanent basis with
Feedback
03
Contacts
  • E-mail ag@sycraft.info
  • Skype ag_2278
  • Telegram @sycraft_fl

My articles on Habrahabr https://habrahabr.ru/users/sycraft/posts/

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