Aleksandr Donskoy

Saint Petersburg, Russia

Member since June 11, 2015

Aleksandr is an accomplished systems administrator with 9+ years of experience managing server infrastructures and data centers. He is professional, with strengths in effectively planning, setting up, and tuning IT infrastructures to consistently achieve high availability and performance. He has the ability to adapt his communication style to diverse audiences including both business and technical.

Aleksandr is now available for hire

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Portfolio

Freelance
Linux, Web services, Load balancers, Virtualization, etc.
Irkutsk Regional ISP
Linux, Networking, FreeBSD, High-load and high-availability infrastructure, etc.
Irkutsk National Sanitary Office
Linux, Windows, Corporate Networks, etc.

Experience

Linux, 9 years
MySQL, 7 years
Apache, 7 years
FreeBSD, 7 years
Network Programming, 7 years
Zabbix, 5 years
Python, 3 years
Puppet.js, 2 years

Availability

Part-time

Preferred Environment

Linux

The most amazing...

...thing I've designed and implemented is an ISP infrastructure for a regional network for 40,000 subscribers. It has more than 3,000 switches and 100 servers.

Employment

System Administrator
Freelance
2014 - PRESENT
- Designed and implemented infrastructure for HA Web service.
- Designed and implemented infrastructure for a web development company.
- Implemented a backup strategy with Bacula software.
- Fixed many performance and security problems.
Technologies: Linux, Web services, Load balancers, Virtualization, etc.
Lead System Administrator
Irkutsk Regional ISP
2008 - PRESENT
- Designed and implemented a regional network and three private data centers. We built the network with more than 3000 switches and routers and 90+ Linux servers of different types.
- Reduced reclamations 50% by introducing technical corporate standards.
- Implemented a fault-tolerant PPPoE cluster with MPD on FreeBSD and a pool of distributed FreeRadius servers.
- Implemented a network monitoring system with Zabbix that has about 30000 data elements and performs at 120 elements/sec.
- Customized billing software using Perl and Python.
- Designed and implemented a complete set of ISP services.
- Built an efficient team of system administrators.
Technologies: Linux, Networking, FreeBSD, High-load and high-availability infrastructure, etc.
System Sdministrator
Irkutsk National Sanitary Office
2006 - 2008
- Designed, deployed, and integrated a corporate network for 100+ users.
- Implemented a backup strategy.
- Upgraded corporate servers with open source software.
Technologies: Linux, Windows, Corporate Networks, etc.

Skills

Tools
Apache, KVM/Qemu, iptables, Vagrant, Zabbix, Nagios, Git, Nginx
Platforms
FreeBSD, Linux, Debian Linux
Storage
MySQL
Misc
Routing, Network Programming, HAProxy, BGP, FreeRADIUS, Asterisk, Bacula
Languages
Python, Perl
Libraries/APIs
Puppet.js
Paradigms
Agile Software Development

Education

Master's degree in Physics, Telecommunication Networks and Systems
Irkutsk State University - Irkutsk, Russia
2003 - 2008

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