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Daniel Duka

@danieelthe

System Administrator with 3+ years infrastructure management experience. Skilled in Linux/Windows, network design, security hardening, and AWS/Azure.

Russian Federation

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What I'm looking for

I'm seeking a remote full-time System or Network Administrator role. Interested in Linux/Windows administration, network design (TCP/IP, DNS, DHCP, VPN, Firewall), security hardening, access control, infrastructure monitoring, and cloud platforms with security focus. Value companies prioritizing infrastructure stability and security. Eager to contribute to secure, reliable systems.

System Administrator with 3+ years of hands-on experience in IT infrastructure management and process automation. I specialize in Linux/Windows server administration, cloud platforms, and DevOps practices. Successfully implemented infrastructure monitoring projects, automation using Python, and cloud services integration. My latest role as System Administrator in an international company (USA-based) provided expertise in corporate infrastructure management, AWS/Azure cloud platforms, and complex automation scenarios. I actively develop my skills in system administration, network technologies, and cybersecurity. Continuously learning new IT tools and technologies. I value opportunities to develop professional skills in complex and interesting projects. Team player, ready for collaboration and knowledge sharing with colleagues. Open to new challenges and opportunities in system administration.

Experience

Work history, roles, and key accomplishments

System Administrator

Visotsky Consulting Inc.

Jan 2024 - Aug 2025 (1 year 7 months)

Managed infrastructure for 2000+ users across AWS/Azure platforms. Implemented Prometheus/Grafana monitoring reducing incident response time from 30 to 2 minutes. Automated business processes with Python, saving 120+ hours annually. Configured VPN, SSL certificates, and access controls. Developed Telegram bots with Docker/Flask.

AWS Azure Prometheus Grafana Docker Python CI CD VPN PostgreSQL

System Administrator

ООО Нестандартные Решения

Jun 2023 - Jan 2024 (7 months)

Administered Cs-Cart e-commerce platform and Linux/CentOS servers. Managed MySQL databases ensuring 99.9% uptime. Integrated external APIs for platform functionality. Set up backup/disaster recovery systems. Oversaw technical department strategy and developer task management. Coordinated with vendors on technical support.

Tech Stack: Linux, CentOS, MySQL, Cs-Cart, APIs, ISPManager, Bitrix24

Ubuntu CentOS MySQL CS Cart API Integration Backup ISPManager Monitoring Notion Bitrix24

System Administrator

ООО Современные Системы Автоматизации

Jul 2022 - Jun 2023 (11 months)

Supported car rental platform infrastructure across multiple branches. Managed server administration and monitoring systems. Provided 3-level technical support to users. Created technical knowledge base and standardized support processes. Trained new technical staff. Tested and improved platform functionality.

Tech Stack: Linux, BPIUM, Kaiten, Monitoring Tools, Google Console, Postman

Monitoring Troubleshooting Linux Postman Process Automation Technical Documentation

Technical Support Specialist

Онлайн школа Тетрика

Jan 2022 - Jul 2022 (6 months)

Ensured stable operation of educational platform. Managed Windows/MacOS systems and user technical issues. Configured office equipment and peripherals. Created technical documentation and user guides. Maintained knowledge base and FAQ. Developed support process automation and trained support staff.

Tech Stack: Windows, macOS, UIS, Omnidesk, Mattermost, Slack, Metabase