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EXPLORE
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$20 USD / Hour
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Bangladesh (10:47 AM)
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Joined on November 20, 2008
$20 USD / Hour
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Over 3,500 hours Upwork job history. A Linux and VoIP expert. 14+ years of industry experience in systems, networking, security and infrastructure. Worked on different companies and ongoing server maintenance. Specialize in Cloud (AWS, Rackspace, Digital Ocean), Open Source Technologies, High Availability, Big Data, System Architecture, Scripting, System Automation, VoIP, Asterisk/FreePBX/Elastix/A2Billing/TrixBox, FreeSwitch. Expertises and the Services I Offer not Limited to: Linux Support - LAMP, LEMP, mixed technologies VoIP - Asterisk/FreePBX/A2Billing/Elastix, TrixBox, FreeSwitch, SIP Proxy Cloud - AWS, Rackspace, Digital Ocean Automation - Custom Scripting, Docker, Ansible, Puppet, Chef Big Data - Hadoop, Spark, Cassandra Messaging - Kafka, RabbitMQ Database - MySQL, PostgreSQL, Oracle, Sybase, MongoDB Caching - Redis, Memcache, Varnish Server Clustering - HAProxy, TinyProxy, Squid, nGinx Database Clustering - Parcona Galera MySQL, MySQL NDB, PostgreSQL
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Experience
Senior System Administrator
Mar, 2015 - May, 2016
•
1 year, 2 months
Viafoura, Toronto, Ontario
Mar, 2015 - May, 2016
•
1 year, 2 months
Resolving escalated service issues, coaching other engineers to resolutions, engineering and implementing complex projects, and for maintaining and overseeing the technology of their assigned accounts. Provide technical services and support for server systems, cloud, network infrastructure. Managing and supporting Linux based high availability SaaS platform on Amazon AWS cloud including but not limited to VPC, EC2, Cloudfront, S3, Route69, IAM, Auto Scaling, ELB, custom AMI.
Mar, 2015 - May, 2016
•
1 year, 2 months
Senior System Administrator
Mar, 2010 - Nov, 2010
•
8 months
Ganz - Webkinz.com, Ontario, Canada
Mar, 2010 - Nov, 2010
•
8 months
Managing and monitoring 800+ linux servers. Covering after hours remotely from Bangladesh. Maintain and administer LAMP, Oracle, JBoss, postfix mail servers. Key role to manage, monitor, install and configure Redhat EL 5, CentOS 5, Gentoo Linux on Dell/Fujitsu Blade Servers. Managing Data center (running with 800+ blade servers and 52 rack server. Troubleshooting and supporting Xen Virtual Machines for the developers as a backup hand. Monitoring servers on 24/7 basis using Nagios and Orion
Mar, 2010 - Nov, 2010
•
8 months
Senior System Administrator
Apr, 2005 - Feb, 2008
•
2 years, 10 months
VoiZar Inc., Toronto, Ontario
Apr, 2005 - Feb, 2008
•
2 years, 10 months
Managed Redhat Enterprise Linux 4, CentOS 4 (an Enterprise Linux), MySQL 5, Oracle 10g, MRTG, SNMP, DNS, FTP, Apache, Tomcat, Deployed Linux Virtual Server for load balancing for Web and VoIP application. Deployed systems after hours and participated in on-call rotation schedule on 24/7 basis. Linux shell scripts and manuals for easy troubleshooting for the team players were developed. Managed VoIP Gateways (Cisco 5300/5350, 5400, XM, Quintum A/D/AX/DX).
Apr, 2005 - Feb, 2008
•
2 years, 10 months
Education
Computer Science, BSc
1998 - 2002
•
4 years
Canada
1998 - 2002
•
4 years
Qualifications
Microsoft Certified Professional
2008
Microsoft
Microsoft Certified Professional
2008
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