16.10.2026 aktualisiert
Premiumkunde
100 % verfügbarSystemingenieur und Softwaretester
Taufkirchen (Vils), Deutschland
Weltweit
BSC in Chemie, MSC in InformatikÜber mich
Erfahrener IT-Spezialist mit einer Leidenschaft für Softwarequalität, Automatisierung und komplexe technische Systeme. Ich arbeite strukturiert, lösungsorientiert und gerne an der Schnittstelle zwischen Softwareentwicklung, Testing und Cisco Unified Communications.
Skills
GitHub ActionsISTQBTest-SoftwareAPIsAutomatisierungTest AutomationVoIPCisco Unified Communications ManagerCisco Certified Internetwork ExpertCisco Certified Internetwork Expert (CCIE) VoiceLinuxITILPythonLinux-AdministrationLinux Servers
System-, Test- und Cisco Netzwerk Engineer mit über 15 Jahren Erfahrung in Softwaretesting, Testautomatisierung, Systemintegration und Enterprise-Kommunikationslösungen.
Umfassende Erfahrung in manuellen, explorativen, funktionalen, Integrations-, System-, Regressions- und Abnahmetests sowie in Testdesign, Defect Triage und Backlog-Management. Schwerpunkt auf Python-basierter Testautomatisierung mit pytest, unittest und Selenium sowie API-Testing mit REST, SOAP, Postman und SoapUI. Erfahrung mit CI/CD-Pipelines, GitHub Actions, GitLab und Jenkins sowie mit Linux, Windows Server, Docker, AWS und GCP.
Langjährige Cisco-UC-Erfahrung in Konzeption, Integration, Migration, Automatisierung und Fehleranalyse. Fundierte Kenntnisse in Cisco CUCM, Unity Connection, CUBE, Jabber, Webex, Voice Gateways, SIP-Trunking und verteilten Multi-Cluster-Umgebungen. CCIE Collaboration zertifiziert.
Tiefgehende Kenntnisse in TCP/IP, SIP, SDP, RTP/SRTP und WebRTC sowie umfangreiche Troubleshooting-
Erfahrung mit Wireshark, tcpdump, SIP-Traces, Logs und Paketmitschnitten. Sicher im Umgang mit Jira, Confluence, Git, SQL, JSON und XML sowie erfahren in agilen Teams, SAFe-Umgebungen und großen Wasserfallprojekten.
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit2013
Sprachen
DeutschverhandlungssicherEnglischMuttersprache
Projekthistorie
- Entwicklung Python-basierter Testautomatisierung, Integrationswerkzeuge und kundenspezifischer Softwarelösungen
- Erstellung automatisierter System-, Integrations- und Regressionstests mit pytest, unittest und Selenium
- API-Testing und Entwicklung von Integrationen mit REST, SOAP, WebSockets und Cisco AXL
- Aufbau und Pflege von CI/CD-Testpipelines mit GitHub Actions, GitLab und Jenkins
- Design, Implementierung und Support komplexer Cisco-Unified-Communications-Lösungen
- Technische Betreuung von Cisco CUCM, Unity Connection, CUBE, Jabber, Webex und Voice Gateways
- Planung und Durchführung von Migrationen, Upgrades, SIP-Trunk-Integrationen und Multi-Cluster-Deployments
- Fehleranalyse auf Anwendungs-, System- und Protokollebene mit Wireshark, tcpdump und SIP-Traces
* Technical Design Architect (TDA) for Large Enterprise UC and Video solutions, providing
technical consulting to sales and pre-sales teams and acting as technical lead for all Cisco UC
post-sales systems integration design and deployment
* In-house Collaboration R&D software engineering, focusing on automation tools and script
development with Cisco WebEx and CUCM AXL/Unity APIs, custom reporting with SQL
Significant Projects
* Designed global hosted multi-tenant hybrid-cloud solution for an Enterprise customer with
multiple subsidiary companies acting as tenants.
* Defined Jinja2-based IOS Voice Gateway templates for Ansible-based configuration management and
provisioning
* Migrated various VXML scripts to Tcl by utilizing IOS's VGAPI to unlock dependencies facing
multiple customer hardware refreshes on ISR 4K Series routers which do not support VXML
* Developed Python-bsed SDK for CUCM AXL and RisPort APIs and Unity Connection CUPI API
technical consulting to sales and pre-sales teams and acting as technical lead for all Cisco UC
post-sales systems integration design and deployment
* In-house Collaboration R&D software engineering, focusing on automation tools and script
development with Cisco WebEx and CUCM AXL/Unity APIs, custom reporting with SQL
Significant Projects
* Designed global hosted multi-tenant hybrid-cloud solution for an Enterprise customer with
multiple subsidiary companies acting as tenants.
* Defined Jinja2-based IOS Voice Gateway templates for Ansible-based configuration management and
provisioning
* Migrated various VXML scripts to Tcl by utilizing IOS's VGAPI to unlock dependencies facing
multiple customer hardware refreshes on ISR 4K Series routers which do not support VXML
* Developed Python-bsed SDK for CUCM AXL and RisPort APIs and Unity Connection CUPI API
* Consulted to engineering teams, providing customer advocacy and acting as a conduit between
engineering, marketing, and external Cisco development teams
* Provided expert insight into user journeys of Large Enterprise and Service Provider customers
* Designed reference test environments to model real-world customer reference configurations and
data sets
* Conducted various R&D projects for engineering management to solve challenging production
issues and overcome dev environment provisioning automation roadblocks
Significant Projects
* Designed scaled reference test beds to test the support of 400,000+ VoIP endpoints
* Developed a provisioning solution to generate on-demand dead-net virtual testbeds, adopting a
containerized NAT integration with ESXi
engineering, marketing, and external Cisco development teams
* Provided expert insight into user journeys of Large Enterprise and Service Provider customers
* Designed reference test environments to model real-world customer reference configurations and
data sets
* Conducted various R&D projects for engineering management to solve challenging production
issues and overcome dev environment provisioning automation roadblocks
Significant Projects
* Designed scaled reference test beds to test the support of 400,000+ VoIP endpoints
* Developed a provisioning solution to generate on-demand dead-net virtual testbeds, adopting a
containerized NAT integration with ESXi