Recommended expert

Ioan Liviu Popa

IT Specialist/Application Developer

Ioan Liviu Popa
Kandern, Germany

Experience

Jan 2013 - Dec 2021
9 years
Schliengen, Germany

IT Specialist/Application Developer

HST Systemtechnik GmbH / Axel Zangenberg GmbH

  • Development of web applications and integration with the Work4All ERP/CRM system using Node.js (Express.js, Socket.IO, TypeScript, Angular, Material, Angular Flex)
  • Development of web applications with PHP (without framework)
  • Frontend development with HTML, CSS, SCSS, JavaScript, JSON, Bootstrap, complex forms and data tables
  • Database work with Microsoft SQL Server, MySQL, MongoDB and others
  • Collaborative work using Agile/Scrum and version control with Git
  • Configuration, maintenance, migration and backup of CMS (Joomla, Mediawiki, Piwik/Matomo)
  • System administration until 2019: maintenance and configuration of servers (Windows, Linux), clients and network
  • Virtualization with VMware ESXi and Veeam Backup & Replication
  • Initial steps in the field of artificial intelligence and machine learning.
Jan 2010 - Present
16 years 1 month

IT Specialist

Self-employed

  • System administration: maintenance, configuration and backup of servers (Windows Server 2025 including Active Directory, DNS, Linux, Solaris) and clients (Windows, Linux), network, firewalls and VPN (e.g., with WireGuard or OpenVPN)
  • Virtualization (Proxmox, VMware ESXi, Veeam Backup & Replication)
  • Apache web server, Certbot, server configuration with Plesk and Hestia Control Panel
  • Documentation systems: Nextra, VitePress (static site generators with Markdown), draw.io (diagrams), Atlassian Confluence
  • CMS: TYPO3, WordPress
  • Web scraping with Node.js, Axios and Cheerio
  • Cloud technologies: Oracle Cloud Infrastructure, Amazon Web Services, Hetzner, Akamai
  • DevOps with GitLab, Apache Subversion, testing with Karma/Jasmine and Jenkins, GitLab CI, Docker, Portainer, LXC, Ansible, Karma (alert dashboard)
  • Database administration: Microsoft SQL Server, MySQL, MongoDB, Informix and more
  • Application development (REST APIs/Microservices) with Node.js/JavaScript (NVM, Socket.IO, AJAX, MySQL, MongoDB, JSON), React, Angular, TypeScript, D3.js/SVG, PHP and Python (without framework)
  • AI experiments with PyTorch, TensorFlow and hardware acceleration
  • AI assistance: VSCode with Ollama and local LLMs, Open WebUI and Msty
  • Collaborative work using Agile, Scrum and Kanban; tools: Slack, Atlassian Jira, Trello, Microsoft Teams, Zoom, Matrix with Element, Kopano, Jitsi Meet, OTRS
  • These are all technologies I've used over the years, some more, some less, and some to this day.
  • At home, I have four 19-inch servers for virtualization.
Jan 2000 - Dec 2011
12 years

Volunteer

Various Organizations

  • Volunteer work in various social institutions in Timișoara, Bucharest, Prague, Reykjavík and other places
  • Roles as IT specialist, development aid worker and translator
Jan 1999 - Dec 1999
1 year

Military Service

Military Service

  • Six months of military service

Languages

German
Native
Romanian
Native
English
Advanced
French
Advanced
Italian
Advanced

Education

Oct 1995 - Jun 1999

West University of Timișoara

Bachelor's degree · Computer Science · Timișoara, Romania

Certifications & licenses

Driver's license class B

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