Stefan Lieberth
Solution Architect at RtBrick Inc
Berlin Metropolitan Area Germany
Summary
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SeniorStefan Lieberth is a Solution Architect with over 20 years’ experience in telecommunications, specializing in service provider networks, IP/MPLS and mobile core architectures. He has led large-scale migrations and deployments—most notably designing an L3-VPN architecture that supported the rollout of around 200 provider-edge routers worldwide—and shaped NFV-based M2M and mobile core solutions for pan‑European operators. Comfortable at the intersection of vendor and operator, Stefan combines hands-on technical design with program-level delivery skills, covering redundancy, load‑balancing, charging (Gx/Gy) and OSS integration. His background spans Siemens, Cisco, Juniper, Alcatel‑Lucent and recent roles advising global enterprise WAN and NFV vendors, giving him rare insight into both legacy migration paths and modern virtualized architectures.
10 years of coding experience
9 years of employment as a software developer
Github Skills (77)
isis10
pppoe10
simulate9
bgp9
icmp9
ospf9
iptv9
python-bindings9
convergence9
yamllint9
yaml8
ncclient8
5g8
python-asyncio8
python8
Programming languages (5)
Github contributions (5)
slieberth/pyrad
Mar 2020 - Feb 2026
Python RADIUS Implementation
Contributions:6 pushes, 4 branches in 5 years 11 months
pythonradius
slieberth/aioRunbook
Dec 2017 - Nov 2018
Contributions:213 commits, 200 pushes, 1 branch in 10 months
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