Network Engineer (REF4322O)

The largest ICT employer in Hungary, Deutsche Telekom IT Solutions (formerly IT-Services Hungary, ITSH) is a subsidiary of the Deutsche Telekom Group. Established in 2006, the company provides a wide portfolio of IT and telecommunications services with more than 5000 employees. ITSH was awarded with the Best in Educational Cooperation prize by HIPA in 2019, acknowledged as one of the most attractive workplaces by PwC Hungary’s independent survey in 2021 and rewarded with the title of the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.
 

Tribe Voice & Messaging is responsible for the design, development, planning, validation, and operation of all voice and messaging platforms within DT Technik’s fixed and mobile networks throughout their entire lifecycle. We provide innovative and reliable state-of-the-art services to our customers. 
 
The TAS-GK (Telephony Application Server - Business Customers)  environment provides a voice over ip platform for business and wholesale customer (SIP-Trunk 1.0, Wholesale, C.SIP.G). Currently are hosted more than 200,000 business customers from all business segments (S/M/L/XL). 

Applicants support the TAS-GK infrastructure team as application and system manager in the planning, implementation and monitoring of changes in the Telco system environment in accordance with the regulations and specifications of Deutsche Telekom Technik.

• Plan, estimate, coordinate, carry out changes in highest quality on network infrastructure components like Juniper Switches, Broadcom VMware virtual machines and SUSE Linux OS
• Implement the continuous improvement / deployment of specific system module deliveries arriving via the CI/CD pipeline from the supplier
• Ensure that operational activities remain on time, according to the agile roadmaps and quarterly plans 
• Ensure the implementation of security and compliance requirements in the task field (hot fixing, certificate upgrades)
• Carry out pre-change and post-change tests and derive necessary measures to ensure the production stability, availability, and security of applications/systems 
• Maintain constant communication with managers, staff, and vendors to ensure proper implementation of changes
• Perform error analysis and troubleshooting sessions, provide reports according to infrastructure monitoring via Zabbix, Elastic Search and Kibana
• Prepare and administrate the own project repository and application within Magenta CI/CD repository

Must have skills: 

• Good working knowledge of the the IPv4 / IPv6 networking protocols / VLANs/ environments including the associated layers and protocols as well as security / access tools 
• Sound knowledge of real-time IT-systems and IP based telecommunication concepts (Network protocols, SIP / RTP tracing)
• Knowledge and experience of non-cloud-based virtualization technologies (Broadcom VMware vSphere, vCenter, VM)
• Familiar with pre-deployment and post-deployment testing in the Magentea CI/CD pipeline
• Familiar with monitoring tools (Zabbix) and performance analysis (Elastic Search, Kibana)
• Familiar with ITIL Framework to effectively support Incident and Change Management processes of the Deutsche Telekom Technik GmbH
• Ability to manage incidents, changes related to the above mentioned tools and problem resolution  
• Participation in the on-call duties is expected 
• You are accustomed to work in geographically distributed team using online tooling such as JIRA, Confluence, Wiki, Sharepoint, MS teams and alike

Nice to have skills:
 

• Technical degree or have completed vocational training in connection with multiple years of experience in the field of system engineering
• Familiar with infrastructure automation via JFrog, Artifactory and AWX Ansible
• ITIL Framework service operation certification is an advantage
• Familiarity with backup & recovery concepts in the network infrastructure (e.g hardware; NetApp, Juniper, Lenovo Server or OS SUMA/ SLES)  
• Knowledge and ideally practical experience in the areas of: cryptography, PKI and authentication services are advantageous e.g. to be able to identify errors based on troubles with expired certificates 
•  German level B2 considered as an advantage

Ideally you are/can:

• Proactive team player and willing to work in a cross functional agile environment 
• Work independently as well as in a team 
• Ready to learn 
• Able to communicate in more than one language
   

* Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.