Carl Letourneau Email & Phone Number

I have worked for the past 18 years as an application developer. I have been responsible for the creation of a network performance analysis and alarming system for Bell's mobile network. I have assumed the role of main developer, system admin and DBA for a system serving several hundred users for the past nine years.I have mainly used .NET , .NET Core and shell scripts (bash) in the recent years, but I also had to work with C++ and Perl. I am extremely familiar with everything related to the manipulation of time-series data and optimizing queries.My responsibilities have allowed me to become well-versed in many areas of knowledge including ETL, time-series databases, MySql administration, Linux system administration and Openstack. I have developed solid problem-solving skills allowing me to troubleshoot a large number of issues related to the different part of these systems over the years. Learning about new things is extremely motivating for me.My computer background dates back 30 years. I have been writing computer programs as a hobby since the early 90s and have amassed a vast amount of general knowledge about computers, operating systems, major software, hardware and networks. I have always had an interest in computer graphics and also possess an understanding of the concepts and technologies behind them.

Listed skills include Xml, Sql, C#, Javascript, and 17 others.

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  Full Stack Developer

  Bell Mobility

  Sep 2002 - Present - Montreal, Quebec, Canada

  - Created the first network performance analysis and alarming system for Bell's mobile network. Helped detect thousands of network issues over the years.- Designed a time-series database to store all performance measurements and system configuration. (MySql)- Developed a set of fault-tolerant ETL processes to load over 100 M counters per hour from XML files, binary files and other RDBMS. Data is automatically aggregated and ready to be quickly queried in a few minutes. (.NET Core, C++, Perl)- Set up and maintained the system's infrastructure using both baremetal servers and virtual instances to support the back-end services and databases. (Linux, OpenStack)- Deployed a monitoring, alarming and notification system for the back-end to reduce impact of outages on the users. (Zabbix)- Created a Windows application user-interface including a custom-designed charting library. The application is used by over 250 employees throughout the company.(.NET, VB & C#)