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Andrii Doroshenko
Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | LinkedIn

SUMMARY
Technical Support / NOC specialist with 6+ years of experience in the VoIP industry and hands-on experience in
network and service monitoring, incident troubleshooting, production support and technical customer communication.
Experienced in working with technical teams, investigating service issues, monitoring infrastructure and resolving
incidents in real time. Familiar with Linux, networking fundamentals, SIP/VoIP technologies, SQL, Git and various
monitoring and ticketing systems.
Currently expanding Linux, networking and DevOps knowledge.

EDUCATION
SoftServe
DevOps Basics Currently studying

Linux
Currently developing deeper knowledge of Linux administration, command line, services, processes, logs and
troubleshooting.

EXPERIENCE
Carrier Relations Manager 2023 – 2025
• Worked with international technical and business partners
• Investigated and resolved issues related to VoIP traffic and service quality
• Analyzed traffic statistics and service performance
• Communicated technical issues and requirements to internal technical teams
• Worked with routing, carriers and telecommunications services
• Prepared reports and analyzed operational data
• Participated in troubleshooting and resolution of service incidents
• Used ticketing and communication systems to track technical issues
Network Operations Center (NOC) Specialist 2018 – 2023
• Monitored network infrastructure and VoIP services in real time
• Investigated and diagnosed service incidents
• Troubleshot production issues and service degradation
• Analyzed technical problems and escalated complex incidents to relevant teams
• Worked with monitoring and technical troubleshooting tools
• Used technical documentation and incident procedures
• Supported critical production issues in real time
• Worked with VoIP services, SIP traffic and telecommunications infrastructure
• Communicated with technical teams during incident resolution
• Worked with Jira, Kayako, Mera, iTest and other internal tools
WordPress Developer Project Work | 2017 – 2018
• Maintained and customized WordPress websites
• Installed and configured plugins
• Worked with HTML/CSS and website layouts
• Worked with ACF
• Fixed issues with forms, integrations and checkout
• Worked with hosting control panels and domains
• Investigated and fixed technical website issues

• Implemented technical SEO fixes

TECHNICAL SKILLS
Operating Systems: Linux — command line, filesystem, processes, services and logs
Operating Systems: Basic Linux troubleshooting
Networking: TCP/IP fundamentals
Networking: TCP/UDP
Networking: DNS
Networking: HTTP/HTTPS
Networking: Basic network troubleshooting
Networking: IP addressing
VoIP / Telecommunications: SIP
VoIP / Telecommunications: RTP
VoIP / Telecommunications: SIP response codes
VoIP / Telecommunications: DID numbers
VoIP / Telecommunications: SIP trunks
VoIP / Telecommunications: SS7 fundamentals
VoIP / Telecommunications: VoIP traffic analysis
VoIP / Telecommunications: 5G
Troubleshooting & Support: Incident investigation
Troubleshooting & Support: Service monitoring
Troubleshooting & Support: Production issue troubleshooting
Troubleshooting & Support: Log analysis
Troubleshooting & Support: Technical documentation
Troubleshooting & Support: Incident escalation
Troubleshooting & Support: Customer technical support
Troubleshooting & Support: Ticket management
Tools & Software: Jira
Tools & Software: Kayako
Tools & Software: Mera
Tools & Software: iTest
Tools & Software: Git
Tools & Software: WordPress
Tools & Software: Hosting control panels
Databases & Web: SQL — basic queries
Databases & Web: HTML
Databases & Web: CSS
Databases & Web: WordPress / ACF
Databases & Web: Basic JavaScript — currently learning

LANGUAGES
English — B2 Business correspondence and communication
Ukrainian — Fluent

ADDITIONAL EXPERIENCE

- 6+ years in the VoIP / telecommunications industry - Experience working with international customers and partners -
Experience with technical support via chat, email and ticketing systems - Experience working in production
environments - Experience collaborating with NOC, technical and business teams