Monitoring, optimization, security, troubleshooting, network configuration, and automation of infrastructure processes.
Yevhenii Kolesnyk
DevOps Engineer
System Engineer
Computer engineer
Software developer
Web developer
Yevhenii Kolesnyk
DevOps Engineer
System Engineer
Computer engineer
Software developer
Web developer
About Me
hey, there 
I have more than 13 years of experience in administering systems under Linux and Windows OS, experience in web development (more backend) and experience application development in different languages for various operating systems.
- Age: 32
- Residence: NL
- Freelance: Available
- Address: Amsterdam, NL
My Services
Server and Network Configuration
Setting up servers and network equipment, installing and configuring operating systems and software.
Monitoring and analytics
Round-the-clock monitoring, metric collection, and analysis of network, software, and hardware performance.
Cyber Security
Protection against DDoS attacks, vulnerability scanning and remediation, server and network updates and maintenance.
Development and automation
Web development and application development, implementation of their automatic deployment on servers and virtual machines.
Resume
Experience
2025 - now
Systems Engineer
Fishfacts B.V.
2017 - 2025
Technical Operations Engineer
Namecheap Inc.
Monitoring, optimization, protection, and troubleshooting of the current
infrastructure: DNS, VPS hosting, Mail and Shared hosting.
2013 - 2025
Linux System Administrator
MIRhosting B.V.
Monitoring and troubleshooting infrastructure servers: Cloud platform, VPS hosting, Shared hosting. Technical support and administration servers for clients.
2010 - Present
Freelancing
Freelance exchanges and own clients
Developing applications and Web development based on client requests. Server administration services. Design and installation of computer networks and equipment.
Skills
PROGRAMMING AND SCRIPTING
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Python
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Bash
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PHP
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Go, Java, C#
Languages
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Russian
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Ukrainian
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English
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Dutch
Operating systems
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Linux90%
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Windows75%
Knowledge
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Administration of Linux and Windows operating systems
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Administering networks
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Infrastructure as Code (IaC)
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Writing Bash and Python Scripts
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Experience in web development (PHP, JS, HTML CSS)
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Experience in containerization and virtualization (docker, openvz, kvm)
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Deep knowledge of DBMS (PostgreSQL, MySQL, MongoDB)
Works
Blog
July 5, 2026
Building GuardFrame CCTV — iOS RTSP Camera Monitoring App
GuardFrame CCTV is my published iOS application for monitoring compatible RTSP/H.264 IP cameras, viewing them on a live CCTV wall, recording important moments locally, and managing recordings through optional GuardFrame Cloud.
June 28, 2026
Building Rhythmiva — Private Cycle Tracking App for iOS and Android
Rhythmiva is a private cycle tracking app I developed for iOS and Android, combining local-first period and symptom tracking with optional cloud sync, AI insights, appointment-ready summaries, privacy controls, and cross-device support.
June 14, 2026
TraceWall Pro — iOS Web Firewall and Developer Host Switcher
TraceWall Pro is a fully developed iOS web firewall and developer host switcher that uses Apple’s Network Extension framework to provide local HTTP/HTTPS traffic visibility, allow/block rules, host mapping, and on-device logs.
Get in Touch
- Address: Amsterdam, NL
- Email: [email protected]
- Phone: +31 6 85 49 85 99
- Freelance: Available
Contact Form