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YAROSLAV YEFIMOV
TECHNICAL SUPPORT ENGINEER

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
[open contact info](look above in the "contact info" section) configuration challenges. As a dedicated final-year student, I combine a
strong work ethic and high stress resistance with a leader’s mindset. I
[open contact info](look above in the "contact info" section) deeply value teamwork, honesty, and constructive feedback, which
constantly drive my professional growth.
Poltava, Ukraine

[open contact info](look above in the "contact info" section)
n/yaroslav-yefimov-
08383b32b/
SKILLS WORK EXPERIENCE
Networking: OSI model, TCP/IP, NAT,
Delta M Group FEB 2025 - PRESENT
DNS, ARP, VPN, HTTP/HTTPS, Technical Support Engineer
Routing/Switching basics
Ensured system stability for CRM and Asterisk platforms through
OS & Administration: Linux (Debian, proactive monitoring using Zabbix.
RedHat) troubleshooting & config, Resolved critical client escalations efficiently by utilizing remote
connection tools and managing requests within ticketing systems
Windows, Apache2, Server Monitoring
Conducted root cause analysis (RCA) for system incidents by deeply
Databases: MySQL, MariaDB, MongoDB analyzing server logs and investigating anomalies.
(setup, config, optimization) Executed advanced SQL queries across MSSQL, MySQL, and
PostgreSQL databases to investigate data discrepancies and resolve
DevOps & Tools: Docker, Basic
incidents.
Kubernetes (K8s), Git, Jira, Confluence Debugged REST API integrations and tracked software defects,
Scripting/Web: Python, Bash collaborating with development teams to improve overall system
reliability.
HTML5/CSS, Powershell.
Mentored and onboarded new team members, providing
API & Tools: REST API, Postman, JSON, comprehensive training on technical support procedures, workflows,
HTTP debugging, Docker, Git, CRM, VOIP. and internal tools.

EDUCATION

Bachelor of Network and Internet technologies 2022- 2026
Sumy State University: SumDU
LANGUAGES
English (B1) Linux & Network Administration 2024 - 2025
Ukrainian (Native) PortaOne Education Centre
Russian (Native)