(fluent Ukrainian) DevOps Engineer (Poland)

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Requirements:

• 3+ years of experience in system/network administration (primarily Linux servers).
• Knowledge of computer networks and protocols: network topology basics, OSI model, key TCP/IP stack protocols (DNS, IP, TCP, UDP, HTTP/HTTPS, WebSockets).
• Practical experience with Linux.
• Scripting skills in Bash.
• Experience with Docker and docker-compose.
• Hands-on experience building CI/CD with Jenkins and Ansible.
• Administration experience with web servers and load balancers (Nginx, Apache Tomcat, Haproxy).
• Experience configuring Postfix (IMAP, DMARC, SPF, DKIM).
• Familiarity with tools for ensuring availability (Keepalived, Corosync).
• Database management experience with MySQL and PostgreSQL (backing up, restoring, encrypting).
• Knowledge of SQL (syntax, profiling, performance optimization).
• Experience administering ProxySQL, Repmgr, Redis, Memcached, RabbitMQ.
• Familiarity with the Grafana/Prometheus/Promtail/Oncall, Nagios, ELK stack.
• Experience with AWS/S3 and Cloudflare.
• Intermediate English (B1) or higher.

Responsibilities:

• Automate development and testing processes from new project creation to existing project support.
• Build and maintain CI/CD processes.
• Set up and monitor systems (e.g., Grafana, Prometheus, Nagios).
• Support cloud servers including installation, patch management, and troubleshooting.
• Manage databases (backup, replication, profiling, troubleshooting).
• Ensure server and system security (detecting and remediating vulnerabilities).
• Document and maintain system inventory.