Denys Krytskyi

• Maintain and automate Linux infrastructure using Puppet (roles, profiles, modules)
• Contributed to building a DevOps culture, improving agility and cross-functional collaboration
• Provided 24/7 on-call support for critical systems, ensuring high availability and rapid issue resolution
• Collected customer requirements and implemented server configurations and onboarding processes
• Supported the migration from HPSM to ServiceNow, gathering and documenting infrastructure needs
• Participated in architectural planning for customer-specific solutions
• Led incident management and root cause analysis across critical systems
• Integrated CI/CD pipelines to deploy Kubernetes infrastructure components using Ansible and Bitbucket Pipelines
• Managed TKGI releases and maintained PKS infrastructure with regular patches, hotfixes, and feature upgrades
• Evaluated migration of Harbor registry from NFS to NetApp S3, improving storage reliability
• Facilitated the transition of Kubernetes clusters and Harbor registry from on-prem TKGI to Azure AKS and ACR using Terraform and GitLab CI/CD
• Maintained detailed documentation and ensured timely delivery of infrastructure projects
• Collaborated closely with development teams to ensure high-quality handover and deployment readiness

Key Technologies: Puppet, Linux, Bash, Ansible, TKGI, Kubernetes, Harbor, GitLab CI/CD, Bitbucket Pipelines, Terraform, Azure AKS, ServiceNow, HPSM

• Led the design and implementation of highly available, production-ready infrastructure on GCP using Terraform
• Deployed and managed Kubernetes applications using Helm, Docker, and custom CI/CD workflows
• Built and maintained cloud environments (dev, staging, production) supporting scale-up from 5 to 350 enterprise customers
• Enabled the migration from Jenkins to GitHub Actions, reducing CI pipeline latency and improving release speed by 26%
• Developed automation in Bash, Python, and Groovy to enhance infrastructure reliability and security
• Implemented flexible secret management using Google Secret Manager with automated replication across GKE clusters
• Supported infrastructure observability and security across multi-cloud environments (GCP, AWS, Azure)
• Contributed to container lifecycle automation, registry integrations, and deployment monitoring strategies

Key Technologies: Terraform, GCP, Kubernetes, Helm, Docker, GitHub Actions, Jenkins, Bash, Python, Groovy, Google Secret Manager, AWS, Azure

• Automated deployment of Zabbix proxies and agents across multiple infrastructure regions
• Integrated Jenkins with Spinnaker to improve CI/CD speed and deployment reliability
• Provided Kubernetes cluster monitoring using Zabbix, reducing troubleshooting time
• Designed and implemented automated system health checks using RobotFramework and Groovy scripts, increasing environment stability
• Automated KVM provisioning in infraVPOD using Terraform and libvirt to boost operational efficiency
• Deployed and maintained Jenkins offline update center using Docker Compose
• Enabled Zabbix monitoring for Docker containers running in RKT environments
• Collaborated with teams to improve monitoring coverage and CI/CD traceability

Key Technologies: Terraform, Jenkins, Kubernetes, Zabbix, Spinnaker, RobotFramework, Docker, libvirt, Ansible, Bash, Groovy

• Maintained and enhanced customer-side deployments throughout the full software lifecycle
• Integrated tools such as static code analysis, test automation, and monitoring to improve system quality and developer productivity
• Designed, developed, and released new features based on customer requirements, ensuring timely delivery and high-quality results
• Used Ansible and Bash scripting to automate deployments and reduce incoming support complaints
• Contributed to continuous deployment pipelines for the Swisscom Orchestrator platform, supporting over 1 million users
• Provided 3rd-line customer support including root-cause analysis, emergency patch deployment, and production hotfixes
• Modernized the delivery framework to support new technologies and improve deployment flexibility

Key Technologies: Ansible, Bash, Swisscom Orchestrator, Jenkins, Linux, Monitoring Tools, Automation Frameworks

• Delivered deployment automation services across Windows and Unix-based environments
• Managed system integration and user collaboration across diverse platforms
• Handled procurement and configuration of network infrastructure equipment
• Led a small IT team: delegated tasks, motivated team members, and liaised with senior management

Key Technologies: Windows Server, Unix, Deployment Services, Network Equipment, Team Management

• Provided advanced technical support for both Windows and Unix systems in production environments
• Diagnosed and resolved critical system issues across networking, OS, and application layers
• Delivered deployment support for new infrastructure rollouts and system upgrades
• Collaborated with global teams to ensure SLA compliance and rapid issue resolution
• Contributed to process improvement and knowledge base development for internal support workflows

Key Technologies: Windows, Unix/Linux, Networking, Shell Scripting, Deployment Tools, SLA Support

• Provided IT support and infrastructure maintenance in mixed Windows/Linux environments
• Gained foundational experience in scripting, server configuration, and virtualization

• Delivered first-level IT support, user onboarding, and system troubleshooting
• Assisted with network configuration and user account management

• Performed basic IT support, printer/network troubleshooting, and workstation setup
• Helped document procedures and supported daily operations of the IT department

• Maintained internal IT infrastructure, including Windows and Linux systems
• Supported user access, system updates, and network troubleshooting

• Delivered end-user support, hardware setup, and application maintenance
• Assisted with local network and server configuration