Kostya Nepomnyashyi
Kostya Nepomnyashyi

Cyber Security Specialist | Networks | Pentesting

Open to offers · Member since 1 Nov 2026
Location
Sofia, Bulgaria
Desired salary
Confidential
Work preference
Hybrid / Full Time, Contract
Experience level
Junior

About

Professional summary

Cybersecurity specialist with an M.Sc. in Cyber Security and hands-on SOC, security engineering, system administration, and software QA experience. Skilled in network security, system protection, penetration testing fundamentals, SIEM monitoring, incident triage, vulnerability assessment, log and traffic analysis, and technical documentation.

Skills

32 capabilities

Tech stack & tools

Working toolkit

Application Utilities

Experience

Career history

IT Specialist Intern, SOC Analyst / Security Engineer CyberIn

Analysed security events and logs in SIEM; worked with IDS/IPS and EDR/XDR detection and prevention tools. Triaged and escalated incidents, documented findings, configured firewalls and NGFW, and worked with network and endpoint protection.

Software Tester I3 Design Europe

Tested web and mobile applications, analysed backend API results, investigated defects, and verified fixes. Created technical documentation and bug reports in English for an international team.

Software Tester Kings Group

Analysed test runs, logs, and failures in CI/CD pipelines. Worked with HTTP/HTTPS, APIs, proxies, and SQL; assessed and communicated risks, escalated issues, and supported release readiness.

System Administrator Intern Borys Grinchenko Kyiv Metropolitan University

Administered systems and user access; performed basic network and security configuration.

Education

Learning history

Borys Grinchenko Kyiv Metropolitan University

Master's, Cyber Security

Advanced network security, threat analysis and risk assessment, vulnerability assessment, penetration testing, security monitoring and incident response, ISMS, and security architecture.

Borys Grinchenko Kyiv Metropolitan University

Bachelor's, Cyber Security

Networks and protocols, operating systems, cryptography, databases, threat analysis, and data protection.

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