Daniel Winzen

Web developer and Linux system administrator with agency and freelance experience in custom WordPress development, e-commerce integrations and hosting infrastructure. Supported more than 100 WordPress websites at giftGRÜN GmbH. Client work spans marketplace synchronization, business IT migrations, email delivery, server recovery and open source development.

Freelance Web Developer and Linux System Administrator at Self-employed (2021 – Present)

• Develop custom WordPress and WooCommerce features, Shopify customizations, REST API integrations, product imports and booking solutions for business clients.
• Configure and maintain Linux servers, web and email hosting, DNS, VPNs and business networks; carry out hosting and infrastructure migrations.
• Diagnose application and server performance issues, resolve email delivery problems, harden systems and recover compromised websites and servers.
• Provide ongoing maintenance and technical consultation, including software updates, plugin troubleshooting and integration support.

Web Developer at giftGRÜN GmbH (2018 – 2023)

• Developed custom plugins and themes and provided technical support for more than 100 WordPress websites.
• Built API connectors for client-specific internal applications and configured deployment scripts.
• Managed server infrastructure, software updates, DNS configuration, web hosting and email hosting.
• Recovered compromised websites, configured VPNs and resolved technical issues across websites and hosting environments.
• Acted as a technical resource for colleagues, shared knowledge and supported Linux and macOS users.

IT Application Development apprenticeship – giftGRÜN GmbH (2017 – 2018)

Internship – giftGRÜN GmbH (2016 – 2017)

Computer Science coursework, 23 credits in Computer Science – RWTH Aachen University (2015 – 2016)