Vitaly Karasik
IT Manager and System / DevOps Engineer

About


Seasoned IT Manager and System / DevOps Engineer with experience in system designing, launching, security hardening, performance tuning and troubleshooting mission critical production systems.

More than 15 years of experience in leading Israeli and international hi-tech companies (NDS, Kayote, Vringo, Jethrodata, Amdocs, Vioozer, Worldmate, RAD and others) as Senior System Manager and DevOps Consultant.

Vast experience with both on-premise (physical and virtual) and AWS cloud infrastructure. Expert in Red Hat (RHCE certified), Ubuntu and other Linux distribution; including full stack of open source applications.




Projects


  • Monitoring and log processing. End-to-end monitoring, from infrastructure to application - and business-level metrics, including alerts, dashboards, reports:
    • Monitoring using on-premise (Nagios/Zenoss/Zabbix/Sensu) and cloud (NewRelic, Anturis, Pingdom, ...) tools
    • Log processing: ELK on-premise and SaaS (Logz.io, AWS)
  • Performance tuning, scaling, price optimization of software/websites (CMSs: Wordpress, Magento; and custom systems)
    • Website performance testing
    • Stress tests, preparing for scaling (BlazeMeter, LoadImpact, Jmeter, etc...)
    • Detecting and fixing bottlenecks
  • Choosing and deploying CDNs - both classic (CDNetworks, CloudFront, ...) and security (Incapsula, Cloudflare)
  • MySQL optimization, scaling, replication, and backups - both on-premise and AWS RDS
  • Deploying and troubleshooting MongoDB and other NoSQL engines, RabbitMQ, ActiveMQ
  • Deploying and troubleshooting web, caching and application servers (Apache, Nginx, Varnish, Tomcat/Jboss, RoR, Python, PHP)
  • Building CI pipelines based on Jenkins, including integration with external systems (Jira/Git/Selenium/...)
  • Deploying/customization/integration of Atlassian tools - Jira, Confluence, Bitbucket
  • End-to-end security review and hardening
  • Configuration management and automation - Puppet, Ansible, Vagrant, Rundeck, custom scripts
  • Building high-availability, scalable systems, or migration from PoC stage to production-ready - from architecture to deployment, including automation, CI, and monitoring. Suggesting the optimal server platform - on-premise, legacy hosting, and cloud hosting.

Contact Me