Freelancer profile translated to English.
Back to original languageAbout Andreas
For over twenty years, including 15 years with my company in Stuttgart, I have been offering comprehensive IT consulting and IT support for Linux and especially OSS. Meanwhile, my portfolio has expanded due to demand to include IT Security (firewalls, cyberattacks, etc.), DevOps techniques, and virtualizations.
All of these have Open Source Software in common. I offer you individual server and software solutions for your challenges with OSS products instead of expensive proprietary products.
- Operating Systems
Debian GNU/Linux, Ubuntu/Kbuntu, Poseidon Linux, SuSE Linux (SLES), RedHat Linux (Enterprise), RedHat Linux-Server, Fedora Linux, Kali Linux, zLinux, Oracle Enterprise Linux, OpenWRT, SELinux, Embedded Linux, Mac OS X, macOS, macOS Server, Android – all versions respectively.
- Server Systems
Apache2, Apache Spark, Tomcat, GlassFish, JBoss Application, WebSphere Application, Asterisk, HylaFax, Courier-IMAP, Crossroads, CUPS, Cyrus-IMAP, DHCP, DNS BIND9), LAMP, FTP, Fuse ESB, MySQL, Postfix, Dovecot, OpenRadius, Fedora Directory Server, 389 Directory Server, OpenLDAP, NIS/NFS, Samba, Squid, Red Hat Cloud Infrastructure, Red Hat CloudForms, Red Hat JBoss Middleware, Red Hat Network Satellite
- Databases
SQL, MySQL, MariaDB, DB2, PostgreSQL, Oracle SQL, Redis
- Virtualization Systems
KVM, Proxmox VE, OpenStack, OpenVZ, Apache CloudStack, XEN, VirtualBox
- Continuous Delivery / Continuous Integration, Deployment
Apache Subversion (SVN), GIT, GITLab, GitHub, Concurrent Versions System (CVS), Cfengine, Puppet, Chef, Ansible, Jenkins, Maven, Ant, Docker
- Penetration Tools
Kali Linux, OpenVas, Nessus, NMAP, NSE, Metasploit, Medusa, MetaGooFil, Harvester, IT-Security Standards (BSI)
Fee Model:
There is a separate support or consulting fee for each different service (including hands-on). In addition, travel expenses, as well as further surcharges for different payment terms or hourly assignments.
English
Conversational
German
Native or bilingual
French
Basic
Can work on-site
Stuttgart (up to 50km), Stuttgart (up to 100km), Frankfurt am Main (up to 20km), Mannheim (up to 20km), Heidelberg (up to 20km), Heilbronn (up to 20km), Ulm (up to 20km), München (up to km)
Experience
- Auf AnfrageConcept and Development of an ERP ProgramLOGISTICS AND SUPPLY CHAINOctober 2022 - April 2023 (6 months)St. Gallen, SwitzerlandThe client has an ERP and invoicing program developed in UniBasic for which they were looking for a replacement. The special requirement of the warehouse space concept, the design of the previous ERP, and the redundant data collection in the form of ISAM files necessitated a new concept.The concept included the migration of ISAM data into a relational database and a completely redesigned GUI for operation via web browser.Subsequent programming and data migration were successfully implemented.
- Auf AnfrageQR Invoice according to Swiss Legal RequirementsLOGISTICS AND SUPPLY CHAINJuly 2022 - August 2022 (1 month)St. Gallen, SwitzerlandThe client requires a QR code for their invoices in PDF format, which must comply with Swiss specifications. This QR code was developed for a Linux system. Particular challenges were an outdated Red Hat Linux system running an ERP system with UniBasic, which could not be changed. Thus, an additional Debian system was installed, which automatically creates the QR code per invoice and makes it available to the old system for integration into the PDF format.
- FinanzdienstleistungenDevelopment and Optimization of Data Analysis and DevOps ProcessesJanuary 2023 - August 2023 (7 months)Frankfurt am Main, GermanyDevelopment and optimization of data-driven analysis and DevOps processes, including automation with GitLab-CI/CD, the use of OpenShift for container orchestration, and the administration of Linux-based system environments. Setup of monitoring with Grafana and Prometheus, implementation of data protection and security requirements, and creation of technical documentation and reporting for quality assurance.
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Certifications
- LPIC (Linux Professional Institute Certificates)Open Source Certification GmbH2015