Aleksandr is available for hire

Aleksandr Donskoy

Verified Expert in Engineering

Network Programming Developer

Location

Saint Petersburg, Russia

Toptal Member Since

August 21, 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.

Linux MySQL FreeBSD Apache Python Puppet.js Mason HAProxy Zabbix Git Nagios Perl Web Services Windows Agile Software Development

Portfolio

Freelance

Virtualization, Load Balancers, Web Services, Linux

Irkutsk Regional ISP

High-availability Systems, Infrastructure, High-load, FreeBSD, Networking, Linux

Irkutsk National Sanitary Office

Networks, Corporate, Windows, Linux

Experience

Linux - 9 years Network Programming - 7 years MySQL - 7 years FreeBSD - 7 years Apache - 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.

Work Experience

System Administrator

2014 - PRESENT

Freelance

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: Virtualization, Load Balancers, Web Services, Linux

Lead System Administrator

2008 - PRESENT

Irkutsk Regional ISP

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: High-availability Systems, Infrastructure, High-load, FreeBSD, Networking, Linux

System Sdministrator

2006 - 2008

Irkutsk National Sanitary Office

Designed, deployed, and integrated a corporate network for 100+ users.
Implemented a backup strategy.
Upgraded corporate servers with open source software.

Technologies: Networks, Corporate, Windows, Linux

Skills

Tools

Apache, KVM/Qemu, NGINX, Git, Nagios, Zabbix, Asterisk, Vagrant

Platforms

Linux, FreeBSD, Windows, Debian Linux

Storage

MySQL

Other

Network Programming, Routing, Mason, HAProxy, Border Gateway Protocol (BGP), Web Services, Load Balancers, Virtualization, Corporate, Networks, Networking, High-load, Infrastructure, High-availability Systems, Iptables, FreeRADIUS, Bacula

Languages

Python, Perl

Libraries/APIs

Puppet.js

Paradigms

Agile Software Development

Education

2003 - 2008

Master's Degree in Physics, Telecommunication Networks and Systems

Irkutsk State University - Irkutsk, Russia

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