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Roman — r_dem

System & Network Administration · Linux & Unix

Ukraine Sumy, Ukraine
285
 13  0


Linux & Unix · System & Network Administration

Ukraine Kyiv, Ukraine
184
 23  0

Hi! I’m a developer and system admin with over 5 years of experience. I help projects stay secure, fast, and reliable. Here’s what I can help you with: — Setting up and securing servers (Linux,…


System & Network Administration · Software & Server Configuration

Ukraine Kyiv, Ukraine
234

• NAT and traffic filtering rules • VPN deployment (WireGuard, OpenVPN) • SSH hardening (key-based authentication, access restrictions) • Basic Linux security audits • Service isolation (FreeBSD jail) • Open port and service analysis • Network troubleshooting My working principles: — reducing unnecessary services — strict access control — clear documentation — configuration consistency I also have experience integrating Linux


Cybersecurity & Data Protection · System & Network Administration

Ukraine Kyiv, Ukraine
219

…control, segmentation, security.• Confidently administer Linux and Windows Server regarding networks, services, and automation.Core Skills• Python (confident): aiogram, requests, BeautifulSoup, sqlite3, API integrations, automation, scripting• Telegram bots: architecture, roles, databases, integrations, optimization• Computer networks: VPN/WireGuard, routing, firewall, NAT, tunneling, access control, diagnostics• Servers: Linux



DevOps · System & Network Administration

Ukraine Kharkiv, Ukraine
I can manage with anything. If I don't know how to do something, I'll learn and complete it.
199

good planning and organizational skills, so I am confident working independently or as part of a team. - work as an individual entrepreneur. CLOUDS - AWS: EC2, IAM, AMI, S3, VPC, SubNets, SecurityGroup, ACL, Routing, NAT GW, InternetGW, BastionHost, VPN, Route53, Lamda, ALB, ELB, Auto Scaling Group, Parameter Store, SNS, SQS, WAF, CloudFront, CodeCommit, Beanstalk, EKS, Kinesis, Redis OS FreeBSD, Linux (Ubuntu, CentOS, AWS Linux