Vitalii C.

- I am a System Engineer with more than 20 years of extensive experience in systems design,
administration, support including 5 years working as a DevOps Engineer.
- My expertise encompasses effective planning, design, installation, configuration, maintenance, and optimization of IT systems for achieving high availability and performance.
- I am skilled in working with cloud computing platforms such as Amazon Web Services, creating and configuring the infrastructure using IaC tools, and working with CI/CD process and source control tools.
- Additionally, I have experience as a Chief Technology Officer and Head of IT Department with 6 immediate subordinates and general team of 12 employees. It helped me to develop good planning and organizational skills, so I am confident working independently or as part of a team.

- work as an individual entrepreneur.

CLOUDS
 - AWS: EC2, IAM, AMI, S3, VPC, SubNets, SecurityGroup, ACL, Routing, NAT GW, InternetGW, BastionHost, VPN, Route53, Lamda, ALB, ELB, Auto Scaling Group, Parameter Store, SNS, SQS, WAF, CloudFront, CodeCommit, Beanstalk, EKS, Kinesis, Redis

OS
FreeBSD, Linux (Ubuntu, CentOS, AWS Linux)

VIRTUALIZATION
Docker, Docker-Compose, Kubernetes ( K8s ), KVM, VMware ESXi

MONITORING
Nagios, Zabbix, Prometheus

MySQL
optimization, clustering (replication setup, configuration, recovering)

IaC, Config control
Terraform, SaltStack, Ansible

Dev auto tools : Jenkins (groovy scripting), GitLab (CI/CD, configuring gitlab-ci.yml)
Version control : Git
Scripting : Bash, Python

NETWORKING
- NET : TCP / IP stack. CARP
- Routing : OSPF, BGP
- CISCO : vlan, trunk, ports aggregation LACP, static routes configuring, acl.

FAILOVER
RAID, link aggregation; redundant channels and STP, net interfaces aggregation, load balancing and traffic distribution at various levels of the OSI model (CARP, BGP, OSPF, Nginx, HProxyServer, CDN GeoDNS)

TELEPHONY
VoIP server Asterisk integrated with PBX (with PRI) PBX - Samsung iDCS 500 (PCMMC OfficeServManager 3.75) programming, cross patching and laying of SCS. Mitel 3300, wifi Mitel phones

SATELLITE & GSM
Seatel ACU, iDirect modem, FB250, Iridium, Internet/telephony/TV via satellite systems and a GSM operator.

Misc
ELK Stack (Kibana), Jira, FireWall (ipfw, pf, iptables), VPN (OpenVPN, mpd5, netgraph), Samba, Postfix, Exim, Apache, Nginx, php-fpm, FTP