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Technical support specialist
- Considering positions:
- Technical support specialist, інженер NOC, DevOps engineer, IT-спеціаліст
- City of residence:
- Odesa
- Ready to work:
- Remote
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Dmytro Berezhnyi
Location: Odesa, Ukraine
Telegram: [open contact info ](look above in the "contact info" section)
Email: [open contact info ](look above in the "contact info" section)
LinkedIn: [open contact info ](look above in the "contact info" section)
SUMMARY
Technical Support Engineer with hands-on experience in Linux systems, web server administration,
networking, monitoring, and troubleshooting. Experienced in supporting web services and hosting
environments, working with Nginx, Apache, DNS, SSL/TLS, log analysis, and resolving client-side and server-
side technical issues.
Familiar with client-server architecture, HTTP/REST API troubleshooting, basic SQL queries, incident
investigation, technical documentation, and escalation. Strong knowledge of Kubernetes, supported by the
CKA (Certified Kubernetes Administrator) certification and DevOps training, with practical experience using
Docker, Zabbix, Prometheus, and Grafana.
CERTIFICATIONS
CKA: Certified Kubernetes Administrator – The Linux Foundation
Issued: Apr 2026 · Expires: Apr 2028
Credential ID: LF-yz6ws5nr1g
DevOps Course Graduate – Hillel IT School
Issued: 2025
Credential ID: 25803977
TECHNICAL SKILLS
Linux & System Administration: Linux (Ubuntu, Debian, RHEL-based systems), system
troubleshooting, log analysis
Monitoring & Observability: Zabbix, Prometheus, Grafana, ELK Stack (basic)
Networking: TCP/IP, OSI Model, DNS, DHCP, IP addressing, Routing, NAT/PAT, Firewalls
Web & API: Nginx, Apache HTTP Server, HTTP/HTTPS, REST API basics, JSON, HTTP status codes, curl,
Postman, SSL/TLS
Containers & Orchestration: Docker, Kubernetes
Programming & Automation: Python, Bash
Version Control & CI/CD: Git, GitHub, GitLab CI/CD (basic)
Databases: PostgreSQL, basic SQL queries
Ticketing: Familiar with Jira Service Management; experience with internal helpdesk/ticketing
systems
PROFESSIONAL EXPERIENCE
Technical Support Engineer (Web Server & Platform Support)
Callstar | 06/2022 – 04/2026
Provided technical support for an e-commerce web platform, investigated incidents using application
and web server logs, and assisted clients with resolving technical issues.
Troubleshot web application, DNS, SSL/TLS, hosting, and connectivity issues and identified whether
problems originated from the client environment, web server, or application infrastructure.
Configured and troubleshot Nginx and Apache web servers.
Documented incidents, troubleshooting steps, and resolutions, and escalated complex issues with
relevant technical information and logs.
Assisted clients with hosting configuration, domains, DNS records, and SSL certificates.
Third Officer / Deck Cadet
V.Ships Crew | 2016 – 2022
Third Officer (2019 – 2022): Responsible for bridge watchkeeping, safe navigation, updating
navigational charts/publications, and maintaining life-saving and firefighting appliances. Managed
technical documentation and port clearance procedures.
Deck Cadet (2016 - 2017): Assisted in navigation, vessel maintenance, and safety inspections under
senior officers' supervision.
Senior Glo Expert
British American Tobacco | 09/2018 – 12/2018
Conducted product presentations, managed B2C sales, and processed customer databases (cold and
warm leads).
PROJECTS & PRACTICAL EXPERIENCE
DevOps & Infrastructure Projects
Kubernetes Lab Administration: Designed, deployed, and configured multi-node Kubernetes
clusters during CKA preparation. Managed application deployment, network policies,
troubleshooting, and cluster security.
Monitoring & Observability: Configured Zabbix hosts, agents, templates, triggers, and monitoring
checks. Deployed and configured Prometheus for metrics collection and querying. Configured
Grafana for metrics visualization and access through an Nginx reverse proxy. Gained basic hands-on
experience with the ELK Stack.
Automation & Scripting: Developed Bash and Python scripts to streamline system administration
tasks, log parsing, and environment health checks.
EDUCATION
Bachelor’s Degree in Sea and River Transport
Specialization: Navigation
National University "Odessa Maritime Academy"
Graduated: 2017
LANGUAGES
English: Intermediate (B1)
Ukrainian: Native
Location: Odesa, Ukraine
Telegram: [
Email: [
LinkedIn: [
SUMMARY
Technical Support Engineer with hands-on experience in Linux systems, web server administration,
networking, monitoring, and troubleshooting. Experienced in supporting web services and hosting
environments, working with Nginx, Apache, DNS, SSL/TLS, log analysis, and resolving client-side and server-
side technical issues.
Familiar with client-server architecture, HTTP/REST API troubleshooting, basic SQL queries, incident
investigation, technical documentation, and escalation. Strong knowledge of Kubernetes, supported by the
CKA (Certified Kubernetes Administrator) certification and DevOps training, with practical experience using
Docker, Zabbix, Prometheus, and Grafana.
CERTIFICATIONS
CKA: Certified Kubernetes Administrator – The Linux Foundation
Issued: Apr 2026 · Expires: Apr 2028
Credential ID: LF-yz6ws5nr1g
DevOps Course Graduate – Hillel IT School
Issued: 2025
Credential ID: 25803977
TECHNICAL SKILLS
Linux & System Administration: Linux (Ubuntu, Debian, RHEL-based systems), system
troubleshooting, log analysis
Monitoring & Observability: Zabbix, Prometheus, Grafana, ELK Stack (basic)
Networking: TCP/IP, OSI Model, DNS, DHCP, IP addressing, Routing, NAT/PAT, Firewalls
Web & API: Nginx, Apache HTTP Server, HTTP/HTTPS, REST API basics, JSON, HTTP status codes, curl,
Postman, SSL/TLS
Containers & Orchestration: Docker, Kubernetes
Programming & Automation: Python, Bash
Version Control & CI/CD: Git, GitHub, GitLab CI/CD (basic)
Databases: PostgreSQL, basic SQL queries
Ticketing: Familiar with Jira Service Management; experience with internal helpdesk/ticketing
systems
PROFESSIONAL EXPERIENCE
Technical Support Engineer (Web Server & Platform Support)
Callstar | 06/2022 – 04/2026
Provided technical support for an e-commerce web platform, investigated incidents using application
and web server logs, and assisted clients with resolving technical issues.
Troubleshot web application, DNS, SSL/TLS, hosting, and connectivity issues and identified whether
problems originated from the client environment, web server, or application infrastructure.
Configured and troubleshot Nginx and Apache web servers.
Documented incidents, troubleshooting steps, and resolutions, and escalated complex issues with
relevant technical information and logs.
Assisted clients with hosting configuration, domains, DNS records, and SSL certificates.
Third Officer / Deck Cadet
V.Ships Crew | 2016 – 2022
Third Officer (2019 – 2022): Responsible for bridge watchkeeping, safe navigation, updating
navigational charts/publications, and maintaining life-saving and firefighting appliances. Managed
technical documentation and port clearance procedures.
Deck Cadet (2016 - 2017): Assisted in navigation, vessel maintenance, and safety inspections under
senior officers' supervision.
Senior Glo Expert
British American Tobacco | 09/2018 – 12/2018
Conducted product presentations, managed B2C sales, and processed customer databases (cold and
warm leads).
PROJECTS & PRACTICAL EXPERIENCE
DevOps & Infrastructure Projects
Kubernetes Lab Administration: Designed, deployed, and configured multi-node Kubernetes
clusters during CKA preparation. Managed application deployment, network policies,
troubleshooting, and cluster security.
Monitoring & Observability: Configured Zabbix hosts, agents, templates, triggers, and monitoring
checks. Deployed and configured Prometheus for metrics collection and querying. Configured
Grafana for metrics visualization and access through an Nginx reverse proxy. Gained basic hands-on
experience with the ELK Stack.
Automation & Scripting: Developed Bash and Python scripts to streamline system administration
tasks, log parsing, and environment health checks.
EDUCATION
Bachelor’s Degree in Sea and River Transport
Specialization: Navigation
National University "Odessa Maritime Academy"
Graduated: 2017
LANGUAGES
English: Intermediate (B1)
Ukrainian: Native
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