System Engineer (VoIP & Network Access)

About the team

WE DELIVER TECHNOLOGY SOLUTIONS CONNECTING YOUR WORLD! Technology Delivery International (TDI) is a key part of Deutsche Telekom, driving innovation across Europe. We deliver the full product lifecycle of telecommunications IT and network technology solutions - from engineering and architecture to development, testing, providing infrastructure, and managing operations. Our international teams work closely with Deutsche Telekom's national companies to bring these solutions to life, ensuring seamless delivery and continuous improvement. Team Members are also working from Hungary within the local organization that we have at Magyar Telekom.

We operate in a chapter-based model that emphasizes skill development and collaboration. This enables us to combine deep expertise with agile delivery, empowering our people while creating real impact for our customers.

We are looking for a motivated, dynamic, and positive System Engineer (VoIP Expert) to join our B2B team. This role focuses on testing, validation, integration, and optimization of CloudPBX telephony and collaboration solutions in a multi-vendor Unified Communications (UC) environment. You will collaborate closely with internal engineering teams, product management, vendors, and international colleagues, especially the German teams, to ensure service stability, interoperability, and innovation across all platforms.

Long-term outlook: you will be increasingly involved in automation activities, including writing test cases and test steps for different terminal development projects.

What you'll be doing

• Test, validate, and troubleshoot CloudPBX, SIP/VoIP services, IMS components, UC clients, and CPE devices.
• Conduct CPE, interoperability, regression, and security testing (including SIP/TLS).

What we're looking for

• University degree (preferred in Computer Science, Telecommunication Engineering, Information Systems, or comparable qualification).
• Fluent in English (German is highly appreciated).
• 2+ years proven experience in the technologies below.
• Strong knowledge of TCP/IP, IPv4/IPv6, OSI model, PPPoE, DHCP, VRRP, L2 VPN, Ethernet, VDSL/SHDSL; experience with SNMP, RADIUS, DNS, SSH.
• Understanding of Wi-Fi, VPN, Fixed Wireless Network technologies, and related performance testing; familiarity with SBC routing, NAT/firewall traversal, and QoS optimization.
• Expertise in VoIP, SIP, RTP, SDP, and codec negotiation (G.711, G.722, Opus).
• Hands-on experience with IMS platforms and CloudPBX/VoIP infrastructures; deep understanding of CloudPBX systems, IP-PBX, CPE routers, Asterisk PBX, and UC platforms (Microsoft Teams, Zoom, RingCentral).
• CPE testing experience (IP phones, UC clients, gateways, routers); knowledge of mobile OS platforms (Android, iOS) for UC client testing.
• Familiarity with HPQC, Jira, or similar QA and defect tracking tools; good understanding of TLS, cipher suites, and secure SIP communication.
• Automation scripting skills (Python or Java) for testing and validation; familiarity with GitLab, CI/CD pipelines, and Linux environments.
• Experience with cloud infrastructure and virtualization (AWS, Azure, Docker, Kubernetes).

• Exposure to Deutsche Telekom & European compliance and regulatory standards (ETSI, CE).
• Experience in test automation frameworks.
• Knowledge of TR-069 / CWMP for remote device management.

Benefits and training opportunities

• Flexible working hours with partial home office options.
• Comprehensive benefits package (laptop, mobile phone, cafeteria, insurance).
• Employee discount rates on Telekom services.
• Modern, multinational working environment with amenities like a sky bar and rooftop gym.
• Access to our Employee Assistance Program.
• Comprehensive Healthcare Package.
• You will receive a minimum of 25 days of basic vacation per year (based on age).
• We offer 15 days of additional vacation if you become a father, with 100% pay.
• You'll have access to thousands of professional and skills development materials from our extensive digital training palette.
• We offer regular internal training sessions and workshops.
• You can learn English and German, even with a native speaker.
• You'll have access to Percipio and Coursera courses.

Jelentkezési határidő: 2026-08-24

Jelentkezés a Magyar Telekom karrieroldalán keresztül.