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🏆SENIOR EMBEDDED LINUX ENGINEER | DEVOPS, SERVER & CLOUD SUPPORT 🏆 I am a Senior embedded Linux and DevOps Engineer with good experience in Linux systems, server administration, networking, cloud, VPN, firewall, Synology NAS, and embedded Linux. I help clients set up, manage, secure, troubleshoot, and optimize networks, servers, cloud systems, remote access, and low-level Linux systems. ▶︎ CORE SKILLS ✅ Linux Kernel & System Programming Linux kernel development and debugging, kernel modules, device drivers KVM virtualization, filesystem, network, USB, Linux video OOPS debugging, performance analysis, system troubleshooting C/C++, Bash, Makefile, Python Linux system programming and low-level debugging ✅ Embedded Linux OpenWRT, Yocto, Android Linux Raspberry Pi, Orange Pi, embedded Linux boards USB, XHCI, WiFi, LTE, network, and camera drivers Router, gateway, and embedded system development Hardware/software integration ✅ DevOps, Cloud & Virtualization AWS, Azure, Google Cloud, VPS, dedicated servers Docker, Kubernetes, QEMU, Libvirt, VirtualBox GitHub Actions, GitLab CI, CI/CD setup Nginx, Apache, SSL setup Cloud server deployment and maintenance ✅ Network Setup & Administration VLAN, routing, switching, subnetting NAT, port forwarding, DNS, DHCP VXLAN, iptables, router configuration Network troubleshooting and performance fixing Office network and secure remote access setup ✅ VPN & Remote Access WireGuard, OpenVPN, IPSec VPN, L2TP Site-to-Site VPN and Remote Access VPN Secure remote access for users, office branches, and private servers VPN troubleshooting and speed optimization ✅ Linux & Windows Server Administration Ubuntu, Debian, CentOS, Rocky Linux, Arch Linux Windows Server, RDP, SSH Active Directory, Group Policy, users, permissions File sharing, backup, updates, monitoring, logs Server migration and issue fixing ✅ Firewall, Security & NAS Firewall rules, traffic control, access policy pfSense, MikroTik, Fortigate, Linux firewall Synology DSM, shared folders, users, permissions Backup, file sync, remote access, NAS security ▶︎ WHAT I CAN HELP WITH ✅ Linux kernel debugging and system troubleshooting ✅ Linux device driver and kernel module work ✅ Embedded Linux setup and development ✅ OpenWRT, Yocto, and Android Linux support ✅ VPN setup, firewall rules, and secure remote access ✅ Linux/Windows server setup and maintenance ✅ Docker, Kubernetes, CI/CD, Nginx, Apache, and SSL setup ✅ Cloud server setup on AWS, Azure, Google Cloud, VPS, or dedicated server ✅ Synology NAS setup, backup, and file server support ✅ Network performance, server performance, and system analysis ✅ DNS, DHCP, VLAN, NAT, routing, and port forwarding I like to understand the problem first, then check the system carefully and fix it step by step. I can help you keep your network, server, cloud, embedded Linux, NAS, firewall, and system software stable, secure, and high-performing.

Have over 20y of IT experience in the field. Worked on different tasks: from simple to complex. Proficient in different programming languages, system administration and DevOps Available mostly in the evenings/nights and full days in weekends of the GMT +2 timezone as I have already a daily job. Experience: Cloud - AWS (since 2009), GCP (3y), Azure (2y), DigitalOcean, Hetzner, Linode etc Containers: Kubernetes, OpenShift, minikube, kops, Docker, docker-compose Scripting/programming: bash, Python, Ruby, Go, Java, PHP, Groovy etc. CI/CD: Jenkins with Groovy, Gitlab pipelines, Bitbucket pipelines, GitHub actions etc. Monitoring: Elastic stack with various beats, Prometheus, Grafana, Zabbix, Nagios, AWS CloudWatch, Munin, Cacti etc. Configuration managment: Ansible, Puppet, Chef SCM: git, svn, Github, (Bitbucket, GitLab - both hosted and on-prem) IaC: Terraform (medium level), Pulumi (beginner) Databases: MySQL, Elasticsearch, SQLite, MongoDB, PostgreSQL Security: OpenVAS, Lynis, PCI-DSS compliance, CIS hardening, OpenSSL Configuration formats: most configuration formats like HCL, YAML, JSON, JSON-path, working with yq and jq, Jinja etc. Virtual Private Networks: Wireguard, OpenVPN, pptp PHP based CMS: Wordpress, Joomla, Mediawiki, Drupal, Concrete - setup, migration, hardening, version upgrade etc. Backup: Borg, zyxBackup, rsync, self written bash scripts OS: Linux, Windows, MacOS, FreeBSD, OpenBSD Repo: Nexus, Artifactory, most common Docker/npm/maven registries etc. Certified: CNCF Kubestronaut Certified Kubernetes Application Developer (CKAD) Certified Kubernetes Administrator (CKA) Certified Kubernetes Security (CKS) Kubernetes and Cloud Native Associate (KCNA) Kubernetes and Cloud Native Security Associate (KCSA) Linux Foundation Certified Sysadmin (LFCS) Linux Professional Insitute Certification 101/102 (LPIC 101/102) Prometheus Certified Associate (PCA)

DevSecOps Engineer with strong IT security & programming background. 🔒 CompTIA A+, Network+, Security+ ,💣 PenTest+, CySA+, Linux+ Certified, 🐋 Certified Kubernetes Application Developer (CKAD) Experienced with Kubernetes, Helm, Terraform, Google Cloud Platform, Amazon Web Services, Docker, Cilium, Jenkins, Ansible and many other technologies. I have strong Linux🐧, Networking and IT Security skills. 👔 I practice my craft almost every single day in a year: doing CI/CD, engineering, including IT security engineering. Tools and topics I have experience with include: 👉 Infrastructure Provisioning and Configuration Management: Terraform, Ansible, kubeadm, kolla-ansible (openstack) 👉 Container Orchestration: Kubernetes, CRI-O, docker, Rancher, RKE3, K3S 👉 Networking and Security: HashiCorp Vault, Tailscale, OPNSense, WireGuard, OpenVPN, DefectDojo, Microsoft Sentinel, IBM QRadar, IntelMQ, Cilium, nftables, OpenVAS, Maltego, metasploit, nmap, burpsuite, zaproxy, Mikrotik, OWASP SAMM, OWASP WSTG, ISO/IEC 27001, NIST CSF (NIST Cybersecurity Framework), CIS Benchmarks, CIS Controls, CISA SCuBA, yara, Netflow, Autopsy, ESET MC, McAfee ePO 👉 RDBMS: PostgreSQL, MySQL, MariaDB, Galera 👉 Other storage: Redis, Memcached, NATS Jetstream, NATS Core, Clickhouse, Elasticsearch/ELK, Kafka, Clickhouse, Zookeeper, etcd, Consul, ELK 👉 Observability and Monitoring: Jaeger, Fluentd, Graylog, Prometheus, Alertmanager, Grafana, CheckMK, Zabbix, NetData 👉 CI/CD: Bitbucket, Confluence, Gitlab, Github, Github Actions, Bamboo, Jenkins, Groovy, Gradle, Maven, Helm, ArgoCD, GitOps, SonarQube, packer 👉 Programming: PHP, Laravel, Python, Django, Cloudevents

I have 12 years of System Administration experience, in companies providing outsourcing services to Fortune500 enterprises around the world. What can I do for you: - migrate all kind of sites (from Wordpress to more complicated) to Amazon AWS, Ovh.ie, DigitalOcean, and any other providers. - configure various AWS Services (Ec2, CloudFront, RDS, Aurora, S3, SES, SNS, etc); - perform any kind of administrative work on your Linux Servers (install software, configure services, setup backups, etc); - create any kind of automations; - write scripts in Bash, Perl, Python; - configure monitoring systems using Nagios. I know how to install/configure/code: Web: apache, nginx, haproxy. Can recompile if needed, can install and compile modules. DB: Mysql (proficient), SQL Server (proficient), PostgreSQL (moderate). Programming Languages: Perl, Bash, PowerShell, JavaScript, Python. Monitoring Systems: Nagios (and derivatives), munin, monit. DNS: any system. Email: sendmail, exim, postfix. Hosting Panels: cPanel, Directadmin, VestaCP, ISPconfig. Virtualization: Amazon AWS - expert. Any other - can do. I'm an excellent learner, for a task I learned PowerShell in 5 hours (sufficient enough to make a pretty complex automation). For another task I learned JavaScript in 8 hours (sufficient enough to make a great Google Apps Script automation). It took me 3 days (24 cumulated hours) to learn Python. So if there is a technology not listed here, I either know it but didn't list, to save space, or I can learn it very quickly.

🔧 What I Do Best 🐧 Linux & Windows: Full server administration and troubleshooting across large fleets — provisioning, hardening, patching, migrations ⚙️ Automation: n8n workflows, Docker, PowerShell/Bash scripting, CI/CD, infrastructure monitoring (Zabbix, Graylog) 🌐 Networking: DNS, SSL/TLS, firewall configuration, email systems (Outlook, Zextras/Zimbra), mail flow & deliverability 🌍 Web: Nginx, Apache, IIS, reverse proxies, Kestrel/.NET hosting, site administration 🧩 Platforms: Creatio CRM/BPM administration, cross-platform deployments ✅ Why Me? ⏩ Speed — Quick turnarounds with minimal downtime 🎯 Precision — Root-cause fixes, not band-aids 💰 Value — Cost-effective solutions built to last I manage infrastructure at enterprise scale (hundreds of servers across mixed Windows/Linux environments) and automate the repetitive work so systems run themselves. Whether you need a one-off fix, a migration, or an automation pipeline built end-to-end, I deliver reliable, production-grade results. Let's streamline your tech. Contact me today.