Vitaliy

Vitaliy Kryschuk
Summary of Qualifications:

Accomplished DevOps Engineer and Infrastructure Manager with over a decade of
expertise in high-availability architecture design and engineering team management.​
Expert in managing 100+ production servers, including bare-metal and virtualized
environments, in an automated fashion using Infrastructure as Code (IaC) tools (Terraform,
Ansible), building secure and scalable enterprise-grade solutions via Cloudflare, and
implementing traffic management using Nginx Load Balancer and Cloudflare LB. Proficient
in designing robust Jenkins CI/CD pipelines with Blue-Green or current-previous version
deployment strategies. Experienced in deploying high-throughput data platforms utilizing
Apache Kafka and Kafka Source/Connect pipelines. Adept at deploying and maintaining
Apache Airflow orchestration platforms to empower Business Analysts (BA). Ensures
granular infrastructure insights by building end-to-end proactive monitoring and alerting
systems using Prometheus, Grafana, and AlertManager.​
As a DevOps Team Lead, successfully built an engineering team from scratch and
revitalized existing teams across multiple companies, possessing extensive experience
leading all aspects from recruitment and onboarding to the introduction of Agile/Scrum
processes. A compelling advocate for educating teams on Zero Trust security concepts,
shrinking technical debt, and aligning engineering delivery with core business priorities.

Technical Skills

Cloud & Virtualization: AWS, DigitalOcean, Hetzner, Proxmox VE, KVM, VMware,
VirtualBox
Orchestration & Infrastructure as Code (IaC): Terraform, Kubernetes (K8s)
Containerization: Docker, Docker-compose
CI/CD & Automation: Jenkins (Pipelines), Ansible
Streaming & Message Brokers: Apache Kafka, Kafka Connect, RabbitMQ
Databases & Caching: PostgreSQL, MySQL, MariaDB, MongoDB, Redis
Logging & Monitoring: Prometheus, Grafana, AlertManager, Graylog, PMM, Zabbix
Web Servers & Load Balancing: Nginx, HAProxy, Apache, Cloudflare (Workers, WAF,
DNS, Load Balancers)
Operating Systems: Ubuntu, CentOS, Debian, FreeBSD, Lubuntu, Windows Server
Scripting & Languages: Bash, Groovy, Lua, PowerShell
Networking & VoIP: Asterisk, FreePBX, OpenVox, SIP, Cisco, Mikrotik, VPN, ZTNA
Data Engineering & BI: Apache Airflow, Metabase (ETL/ELT data movement consultation)
Professional Experience

DEPLOYA.SYSTEMS ​ 06.2026 – …​
Position: DevOps​
Responsibilities: Manage and automate cloud infrastructure using Terraform, Kubernetes,
and Ansible. Implement and maintain CI/CD pipelines, administer Apache Kafka, and
optimize security and performance through Cloudflare.
​
Environment:K8S, Terraform, Ansible, Apache Kafka, Cloudflare, CI/CD
​
BillTech ​ 08.2021 – 06.2026
Position: DevOps
Responsibilities: Managed and supported 100+ production and development servers,
ensuring high availability, fault tolerance, and operational efficiency. Configured NGINX load
balancers/reverse proxies and administered Cloudflare infrastructure (Workers, WAF,
routing, DNS, and Load Balancers) across multiple domains. ​
Designed and maintained automated Jenkins pipelines for build, test, and deployment
workflows. Implemented Blue-Green deployments, automated rollback procedures for
frontend versions, and webhook-driven environment promotion to reduce release risks.​
Managed Docker-based application deployments and optimized Node.js and Nuxt.js build
processes, performance, and artifact delivery.​
Architected Apache Kafka clusters for real-time event streaming and maintained Kafka
Connect pipelines (including MongoDB Source and MongoDB-to-Google BigQuery).
Administered MongoDB, PostgreSQL, MySQL, Redis, and RabbitMQ environments,
including replication, backup strategies, and HA configurations.​
Provided consultation to BA on data platform architecture, ETL/ELT design, and data
movement. Deployed and supported Apache Airflow and Metabase platforms for workflow
orchestration and self-service BI analytics.​
Implemented monitoring and alerting solutions using AlertManager, Prometheus, Grafana,
Node Exporter, and Pushgateway to deliver comprehensive infrastructure visibility.​
Administered standalone and clustered email systems, overseeing routing, monitoring,
and Postmaster operations.

Environment: Pipelines, Jenkins, CI/CD, Cloudflare, Node, Docker, Prometheus, Grafana,
Graylog, PMM, MongoDB, Metabase, AirFlow, Email, Postmaster, MySQL, Apache Kafka,
Amazon AWS, DigitalOcean, Storybook, Nuxt, PostgreSQL, BitBucket, Terraform, Ansible,
Bash, Groovy​
​
VIL | Virtuelles Interaktives Lernen​ 03.2021 – 08.2021
Position: DevOps, Team Lead
Responsibilities: Designed and implemented a deployment automation mechanism for
delivering production bundles to physical devices, reducing release time from 24 hours
(requiring 3 engineers) to just 2 hours managed by a single engineer.
Deployment automation for virtual reality halls. Improving the technical architecture of a
project for teaching students in virtual reality.
Automatic deployment and configuration of VR headsets. Introduction of the Scrum
development methodology and the role of Scrum Masters in teams.

Environment: Bash, PowerShell, Ansible, Confluence, Jira, nginx, VR,
Operating Systems: Android, Windows OS, Ubuntu, Pico OS
VR: Oculus, Pico, VIVE

7th-space​ 02.2021 – 08.2021
Position: DevOps, Team Lead
Responsibilities: Led the optimization of the technical architecture for a users VR-learning
platform, ensuring backend scalability and frontend/client-side stability.
Configured build pipelines for "heavy" VR bundles and automated their delivery systems
directly to end-user devices.
Ensured automated deployment and configuration of VR headsets, which was critical for
rapid hardware setup in physical virtual reality halls.
Built an automated testing infrastructure by integrating local testbeds equipped with VR
headsets into the global CI/CD pipeline; this enabled automated build deployment to
headsets for instant FPS and latency checks after every code change.
Successfully introduced the Scrum framework, clearly defining the role of Scrum Masters
within sub-teams to increase agility and accelerate release cycles.
Maintained a balance between addressing technical debt and delivering business features
(such as preparing servers for the release of new VR applications).
Built an effective team from the ground up, managing the entire lifecycle from technical
interviews and onboarding to establishing internal processes, resulting in a team that
continues to successfully operate in the company today, in 2026 year.
 Mentored DevOps engineers and system administrators, fostering their professional
growth and facilitating their onboarding into specific GameDev and VR toolsets.
Served as the primary communication bridge between Developers, Technical Artists, and
QA testers, ensuring synchronized cross-departmental collaboration and eliminating the
"blame game" for broken builds.

Environment: Bash, PowerShell, Ansible, Confluence, Jira, nginx, VR,
Operating Systems: Android, Windows OS
VR: Oculus, Pico, VIVE

NDA​ 08.2018 – 03.2021
Position: Systems Engineer
Responsibilities included: Infrastructure design and development, configuration
management, deployment automation. Data backup and recovery. Real-time data
synchronization. Dev team support. Provide secure video and voice communications.​
Corporate cloud setup. Security policies development and implementation.
Implementation and administration of Zero Trust security architecture (ZTNA), identity and
access management, network segmentation, and secure remote access solutions. Nginx
configuration and traffic management. Configuring ACS (access control systems). ​
Dedicated Hetzner server administration, including RAID array configuration, LUKS disk
encryption, mail server deployment and maintenance. Full remote provisioning and
configuration of Hetzner dedicated servers using Ansible, including deployment, security
hardening, network configuration, user and access management, service deployment,
infrastructure automation, monitoring setup, and ongoing configuration management.

Environment: Ubuntu, Bash, Docker, Ansible, Git, Confluence, RocketChat, Jira, Jitsi,
OpenVPN, Rsync, Lsyncd, ProxMox, IredMail, Nextcloud, OwnCloud, Virtual Private
Network (VPN), Proxy Server, Hetzner, Dedicated, Confluence, Encryption, Tableau, Real
Time Streaming Protocol (RTSP)​

hotels24​ 10.2014-08.2018
Project Description: Booking service
Position: System Administrator
Responsibilities included: Worked with a two–data center architecture (production and
local/backup environment). Data centers were based on colocation infrastructure with
dedicated racks, independent power distribution, UPS systems, and rack units for server
installation. Installed and configured hardware including servers, SIP gateways, and
network switches within rack environments. ​
Designed and implemented a 10 Gbps network backbone using SFP+ modules and DAC
(Direct Attach Copper) cables, ensuring high-speed, low-latency connectivity between
servers, switches, and data center components.​
Configured and maintained hardware and software RAID arrays (RAID 1, RAID 5, RAID
10, RAID 50) to ensure data redundancy, performance optimization, and fault tolerance
across critical storage systems.​
Implemented and maintained centralized monitoring and alerting infrastructure using
Zabbix, covering servers, network equipment, services, and system metrics to ensure high
availability and proactive incident detection.​
Independently designed and built an emergency power supply system for the local data
center based on a gasoline generator, AC-to-DC rectifier, and DC-to-AC inverter providing a
stable pure sine wave output. The system ensured uninterrupted operation of critical
infrastructure during power outages.​
Infrastructure design and development, configuration management, and deployment
automation. Data backup and disaster recovery planning and implementation. Real-time
data synchronization between systems and environments. Hosting, web services, and
application maintenance in production and staging environments. Team support, incident
handling, and troubleshooting of infrastructure and services. Preparation and maintenance
of internal technical documentation. VoIP system setup and configuration, including call
center solutions.​
Provided technical support and maintenance for a call center infrastructure consisting of
200+ local workstations running a Lubuntu-based Linux distribution. Responsible for
workstation deployment, configuration, software updates, troubleshooting, and ensuring
stable operation of client-side environments. Supported continuous availability of call center
operations by resolving hardware, network, and application-related issues in a timely
manner.

Environment: Nginx, MongoDB, Mysql, PHP-fpm, Mails, Domains and DNS, SIP, Asterisk,
FreePbx, ProxMox, IredMail, OpenVox, DinStar, Cisco, Cisco ASA, Mikrotiks
Operating Systems: CentOS, Ubuntu-server, Lubuntu, ProxMox VE, Ubuntu-desktop,
debian, Windows /7/xp/, Windows 10, Windows Servers.
Letyshops​ 04.2016-09.2016
Project Description: Cashback service for customers when shopping in online stores.
Position: System Administrator
Responsibilities included: Initial network design and configuration. Build seamless Wi-Fi
connections for employees. Implement security policies and processes. Protect
infrastructure and web-services from DOS and DDoS attacks. Infrastructure migration to
new data centers.
Environment: Nginx, Networks, Iptables, CSF, Mikrotik, UniFi, Seamless Wi-FI, Ubiquiti
Networks.

deshevshe.net.ua, ckvhost.com​ 08.2012-09.2014
Project Description: IT support
Position: System administrator, network engineer.
Responsibilities: Install and maintain bare metal and virtual(kvm) servers(web, mail
servers). Network configuration (gateways, vpn, etc). Database maintenance (MariaDB,
Percona, MySQL). Hardware and application monitoring. Helpdesk and troubleshooting.
Environment: MySQL, Apache, nginx, dhcp, dnsmasq, mdadm, Zabbix, phpMyAdmin,
Rsync, Iptables, bash, php, kvm.
Operating Systems: CentOS, Ubuntu-server, ubuntu-desktop, debian, Windows /7/xp/.

Education

Vinnitsa National Technical University.​ 2004-2009
Faculty for Information Technologies and Computer Engineering
Specialty for Information systems of decision making.
Software engineer

Contacts

email: [open contact info](look above in the "contact info" section)
tel: [open contact info](look above in the "contact info" section)
tg: @vitaliy_kryschuk