Дмитрий Окунев Email & Phone Number

Building and supporting fault tolerance, high availability online store with more then 10 million requests daily and ERP System based on 1.5Tb MySQL.Technology stack:All services based on 25 dedicated servers in Hetzner - MySQL Master - Multi Slave (1,5 Tb) - MongoDB- Nginx php-fpm- Redis cluster- NodeJS- Github- Jenkins- Ansible- Zabbix- Docker - Percona Monitoring and ManagementPersonnal results:Implemented MySQL master-slave cluster and move reading to slave. Implemented Redis cluster. Moved all services to new dedicated servers in Hetzner without downtime. Found a lot of slow parts in the system and make it workable without delays.

Самарская Область, Россия

- Developed strategy for IT- Upgraded existing infrastructure:1. Install Vmware vsphere 6.5 and migrate all servers in virtualization infrastructure2. Deploy Zabbix monitoring and tune events on critical servers3. Consolidate networks in 3 offices to local network via VPN connection4. Deploy domain infrastructure with Windows server 2016, connect workstations to domain- Implementated High-Availability critical services:1. MS SQL Always On Cluster2. Web application server to high availability system with 'zero' downtime: Percona xtradb cluster, PHP (GlusterFS+ProxySQL), Nginx load balancing

1. Budget planning, Budget control.2. Managing purchasing IT software, services, technologies, licenses.3. Development and implementation of IT instructions, rules, policies 4. Design, install and manage infrastructure in new filial, such as:- ERP system Galaktika- Microsoft SQL Server (High-availability cluster)- Oracle database 10g, 11g (Rman, Standby)- IIS - System Center Configuration Manager (SCCM)- System Center Operations Manager (SCOM)- Microsoft Lync 2013

- Defined service level agreements (SLA)- Provided direction to team members as assigned by management- Provided recommendations to management on behalf of the team- Created high availability system with 'zero' downtimeMicrosoft SQL Server/Oracle database administration:- More than 100 production and testing databases in maintanance.- Responsible for database backups, design, development, testing, and performance tuningWebsphere Application Server/Oracle Application server administration:- More than 100 production and testing application servers in maintanance.- Responsible for application servers design, testing, and performance tuningSystem center Configuration Manager administration:- Part of a team of senior engineers responsible for the creation and automation of SCCM infrastructure and content to support a managed digital workplace product- Supported over 25000 workstaions: 1 - Central Site, 16 - Primary Sites, 50 - Secondary Sites

- Installed, configured and managed a datacenter with multiple VMware ESXi hosts with High Available in PJSC "Rosneft Oil Compan"- Installed, configured and managed a datacenter with multiple Huper-V hosts with High Available in JSC “TYAZHMASH”- Installed, configured and manager Microsoft System Center Configuration Manager in PJSC "Interregional Distribution Grid Company of Volga"

Oracle database administrator:- Installed, configured and managed Oracle databases in Windows server/UNIX/Linux environments (oracle 9i windows server, oracle 10g RHEL)- Maintained and updated the database schemas as requested by the Lead Oracle DBA- Created roles and users and managed their privileges- Implemented and monitored RMAN backup jobsOracle Application server administrator:- configured and managed OAS - performed application update• HP Blade Servers• VMware Virtualizaion on HP Proliant DL560