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YAROSLAV YEFIMOV

PROFILE
Proactive and result-oriented IT professional with over a year of
experience managing the full lifecycle of complex technical incidents, from
CONTACT initial analysis to successful resolution. Possessing strong analytical and
problem-solving abilities, I excel at diagnosing deep infrastructure and
[відкрити контакти](див. вище в блоці «контактна інформація») configuration challenges. As a dedicated final-year student, I combine a
strong work ethic and high stress resistance with a leader’s mindset. I
[відкрити контакти](див. вище в блоці «контактна інформація») deeply value teamwork, honesty, and constructive feedback, which
constantly drive my professional growth.
Poltava, Ukraine

[відкрити контакти](див. вище в блоці «контактна інформація»)
n/yaroslav-yefimov-
08383b32b/

SKILLS WORK EXPERIENCE
Delta M Group
Networking: OSI model, TCP/IP, NAT, MAY 2026 - JULY 2026
Support Tech Specialist
DNS, ARP, VPN, HTTP/HTTPS,
Directed daily support operations, ensuring fast, reliable, and
Routing/Switching basics
effective resolution of customer requests.
OS & Administration: Linux (Debian, Analyzed team performance metrics (KPIs) to identify bottlenecks
RedHat) troubleshooting & config, and implemented process improvements that elevated overall
service quality.
Windows, Apache2, Server Monitoring
Mentored and trained team members, actively developing their
Databases: MySQL, MariaDB, MongoDB technical troubleshooting expertise and client communication
(setup, config, optimization) skills.
Acted as the primary point of escalation, collaborating closely with
DevOps & Tools: Docker, Basic
engineering and cross-functional teams to resolve complex, high-
Kubernetes (K8s), Git, Jira, Confluence priority issues.
Scripting/Web: Python, Bash Created and standardized troubleshooting guides and SOPs
(Standard Operating Procedures) to accelerate the onboarding of
HTML5/CSS, Powershell.
new support engineers.
API & Tools: REST API, Postman, JSON,
Delta M Group
FEB 2025 - MAY 2026
HTTP debugging, Docker, Git, CRM, VOIP. Technical Support Engineer
Ensured system stability for CRM and Asterisk platforms through
proactive monitoring using Zabbix.
Resolved critical client escalations efficiently by utilizing remote
connection tools and managing requests within ticketing systems
Conducted root cause analysis (RCA) for system incidents by
deeply analyzing server logs and investigating anomalies.
LANGUAGES
Executed advanced SQL queries across MSSQL, MySQL, and
PostgreSQL databases to investigate data discrepancies and
English (B1)
resolve incidents.
Ukrainian (Native)
Debugged REST API integrations and tracked software defects,
Russian (Native)
collaborating with development teams to improve overall system
reliability.

EDUCATION
Bachelor of Network and Internet technologies
2022- 2026
Sumy State University: SumDU

Linux & Network Administration
2024 - 2025
PortaOne Education Centre