Vasily Korytov

Lead, Architect, DevOps, Developer, Linux engineer

Dnipro, Ukraine vasily.korytov@icloud.com chillum.github.io

Summary

IT engineer with 20+ years of hands-on experience and 5+ years of managing experience.

Rich experience in designing, implementing and maintaining complex systems.

Tools and skills

• Languages: fluent in English
• Operating systems: Linux, Unix
• Programming languages: Go, JavaScript, Ruby, Python, Groovy, shell
• Automation tools: ArgoCD, Ansible, Puppet, Jenkins, Terraform, Terragrunt, Selenium
• Version control systems: Git, Subversion
• Virtualization: KVM, Xen, Vagrant
• Containers: Kubernetes, OpenShift, Helm, Docker, OpenVZ
• Cloud computing: AWS, Azure, GCP
• Logs: Loki, Graylog, EFK stack
• Databases: Postgres, Redis, MongoDB, MySQL
• Networking: OpenVPN, IPSec, Tor, proxies, firewalls
• Web stuff: AngularJS, Django, Rails, PHP, nginx, Apache

Work experience

DevOps Team Lead, Sandsiv Group Ltd. (2021-)

• Architecting and implementing a GitOps flow for automated delivery
• Piloting the automated tests frameworks, cases and workflow
• Designing and implementing on-premises installation suite
• Planning the tech dept elimination progress
• Code review

Senior DevOps engineer, GlobalLogic (2020-2021)

• Developing infrastructure as code
• Build and deploy pipelines
• Designing and implementing CI/CD flow
• R&D on finding best ways on adopting customer's needs for the cloud migration
• Code review

Senior DevOps Engineer, Codefresh (2019-2020)

• Build and deploy pipelines and Helm charts
• Monitoring set-up and refinement
• Grafana dashboards
• Designing and implementing custom exporters for Prometheus
• Designing and implementing custom daemons and services
• Refactoring of existing solutions, adapting them to new use cases

Sr. DevOps/Systems architect, Fortifier (2015-2019)

• Designed the IT ecosystem for the company
• DevOps team formation and mentoring
• AWS and Azure environments set-up and administration
• Infrastructure as code, set-up and delivery automation
• Development and operations
• Containerization
• Information systems audit
• Troubleshooting
• Code review

DevOps, Roch Systems LLC (2014)

• Implemented instance data sharing architecture for Docker and Amazon S3
• Implemented a log rotation utility for Amazon RDS
• Implemented a template rendering processor
• Docker and Vagrant scripting, images and boxes
• Configuration of Web and VPN services
• Build and bootstrap scripts
• Troubleshooting, assisting developers

Deployment lead, Inside Systems LLC (2012-2014)

• Architected a cluster solution on base of Inside ISP DCI HTTP-filtering server, allowing solution to scale up to 8GB/s HTTP traffic (standalone Inside ISP Server solution had 250MB/s performance)
• Implemented DB architecture for the cluster solution
• Implemented a load balancer for the cluster solution
• Set up a Puppet infrastructure for automated setup and maintenance
• Set up Subversion infrastructure, managed testing and production releases
• Controlled load and stress testing
• Provided technical and commercial documentation
• Commercial and technical discussions with developers and customers
• Hardware benchmarks, load planning, server specs
• IT infrastructure planning and consulting

Chief information officer, Hot Spot (2011-2012)

Managed sysadmin department

• Hunted & trained the system administration team
• Assigned tasks, priorities and provided execution control to the system administration team workflow
• Met with clients to discuss project details
• Administrated infrastructure-wide services, managed access permissions and security procedures
• Planned infrastructure-wide activities and needs, made unification decisions
• Managed tech docs

Maintained critical servers

• Virtualization
• Web, databases, and streaming media
• Private repos, VPNs and misc. networking

As IT specialist

• Made load estimations and built server schemes and specs
• Wrote configuration policies
• Managed a custom deploy scripts system
• Deployed new servers and applications
• Scripting, benchmarks
• Works with developers, troubleshooting
• Code review

Systems administrator, FlexPro (2005-2011)

• Maintained all hardware and software IT infrastructure of the company, including workstations, servers and network equipment
• Migrated a legacy Windows-based server infrastructure to a Unix-based one
• Ethernet networks installation, hardware configuration of servers and workstations
• Set-up and administration of Windows-based terminal servers
• Developed and deployed a custom Unix-based thin client
• Set-up and administration of Unix servers, including:
  • Web services
  • E-mail
  • DNS
  • Proxies and gateways
  • VPN
  • Samba domains
  • IP telephony
• Set-up, administration and tech support of Windows workstations
• Developed a backup system for the company
• Web design and development

IT engineer, Zeppelin PM Company (2007-2009)

• Installed and maintained a Unix-based server infrastructure:
  • Internet access services
  • VPN service
  • Mail service
  • File servers
  • User data backups system
• Administration of Windows workstations
• IT consulting

Systems administrator, YPI Yellow Pages Ltd. (2003-2004)

• Maintained hardware and software IT infrastructure of the Moscow office, including workstations, servers and network equipment
• Administration of Unix and Windows servers
• Set-up, administration and tech support of Windows and Mac OS workstations
• Ethernet network installation, hardware configuration and specs

Free-lance Unix engineer (2001-2002)

• Developed a traffic billing system
• Deployed Unix-based Internet gateways to an ISP and an Internet Cafe

Web designer, Firm Green Island (2000)

• Web design
• Web development (Perl, PHP, HTML, CSS)
• Web server administration