Roman.

I worked as a Senior DevOps Engineer.

• Implemented and operated highly available web services in the cloud (AWS, GCP)
• Administered and performance-tuned SQL databases (MySQL, PostgreSQL)
• Provided 3rd-level troubleshooting for highly complex web applications
• Managed configuration with Terraform and Ansible
• Automated processes and wrote tooling in Bash and PHP
• Implemented and improved CI/CD pipelines in GitLab, including migration from Jenkins
• Migrated a legacy deployment to a container-based deployment
• Consolidated multiple projects into a single monorepo

I was a member of the IT operations department, focusing on Linux.

• Developed and maintained highly scalable web projects (network design, monitoring, high availability, and load balancing)
• Administered highly available databases (Percona MySQL, PostgreSQL, Elasticsearch)
• Planned and performed service migrations with minimal downtime
• Automated processes using Bash, PHP, and Python scripts
• Managed configuration with Puppet and Ansible
• Administered networks (Ethernet, routing, VPNs)
• Diagnosed and resolved highly complex technical problems
• Implemented a PCI-DSS compliant infrastructure (Level 1 Service Provider)
• Participated in on-call duty
• Served as assistant head of operations

I was a member of the IT operations department, focusing on Linux.

• Maintained 40 virtual servers across three datacenters in different countries
• Performed an upgrade of the distributed Checkpoint firewall
• Participated in a project to replace the legacy infrastructure with a VMware setup
• Participated in the on-call duty rotation

Co-founder and CTO of an ISP providing the following services to over 500 customers, including many business customers:

• Domains
• Email
• Web hosting
• Virtual servers

During this time, I developed a custom customer panel and built a highly available infrastructure. The following software was used:

• Xen
• Linux
• Apache
• PHP
• Postfix
• Dovecot
• ProFTPd
• MySQL