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YAROSLAV YEFIMOV
Technical Support Engineer | DevOps Engineer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Poltava, Ukraine

SUMMARY EDUCATION

Technical Support Engineer transitioning to DevOps with experience Bachelor of Network and Internet
supporting Linux-based environments, monitoring CRM and Asterisk
technologies
systems, investigating incidents, and troubleshooting production issues.
Improved support ticket resolution rate by 25% and reduced average Sumy State University: SumDU
response time by 30% through process and workflow improvements. 2022 - 2026
Uses Zabbix, SQL, log analysis, and REST API debugging to identify root
causes and resolve system issues. Holds a Bachelor's in Network and
Internet Technologies. SKILLS

Networking & Infrastructure
EXPERIENCE
OSI model, TCP/IP, NAT, DNS, ARP, VPN,
HTTP/HTTPS, Routing/Switching,
Support Tech Specialist Infrastructure troubleshooting
Delta M Group 05/2026 - Present
• Improved department performance by 20% by training 15 team Linux & System Administration
members in troubleshooting workflows and customer issue handling
while leading daily support operations. Linux (Debian, RedHat) troubleshooting &
• Accelerated new employee onboarding by 40% by creating 10 SOPs config, Windows, Apache2, System
that standardized troubleshooting steps and incident response. administration, Log analysis
• Resolved high-priority escalations by coordinating with engineering
and cross-functional teams on customer issues and production Databases
incidents.
• Improved support coverage by mentoring support engineers on MySQL, MariaDB, MongoDB (setup, config,
troubleshooting methods and customer communication for complex optimization)
incidents.
• Reviewed KPI trends to identify support bottlenecks and adjust team DevOps & Containers
processes for issue resolution.
Docker, Kubernetes (K8s), Git, Jira,
Confluence, Containerization, CI/CD
Technical Support Engineer
Delta M Group 02/2025 - 05/2026 Scripting & Automation
• Increased support ticket resolution rate by 25% by monitoring CRM
Python, Bash, HTML5/CSS, PowerShell,
and Asterisk environments with Zabbix and improving support
Automation scripting
processes.
• Reduced average response time by 30% by optimizing team workflows
and resolving client-facing incidents through remote access and APIs, Monitoring & Support Tools
ticketing systems. REST API, Postman, JSON, HTTP
• Identified root causes of production issues by analyzing server logs debugging, Docker, Git, CRM, VOIP, Zabbix,
and investigating system anomalies across CRM and telephony
Incident management, Root cause analysis
environments.
• Resolved data-related incidents by using SQL across MSSQL, MySQL,
and PostgreSQL to investigate discrepancies and support issue
resolution. TRAINING / COURSES
• Improved platform reliability by debugging REST API integrations and
partnering with developers on defect investigation. Linux & Network Administration
PortaOne Education Centre

LANGUAGES

English B2 Ukrainian Native

Russian Native

PROJECTS

Personal Linux Server Administration
2024 - Present
Administer a rented Linux server for infrastructure practice and
self-hosted services. Deployed Docker and Kubernetes
workloads, configured monitoring, and handled ongoing system
setup, troubleshooting, and operational maintenance.