Senior Network Architect - SP IP/MPLS, BGP, 5G SA transport, multi-vendor (Nokia/Cisco/Juniper). Also IT network PM. JNCIP-SP. Freelance, remote EU
Aktualisiert am 05.06.2026
Profil
Freiberufler / Selbstständiger
Remote-Arbeit
Verfügbar ab: 05.06.2026
Verfügbar zu: 50%
davon vor Ort: 10%
IP/MPLS
Network Architecture
IT Project Management
BGP
MPLS L3VPN
MPLS L2VPN
Multicast VPN
OSPF
IS-IS
Inter-AS
5G SA
GTP
SEPP
IPX/GRX
Nokia 7750 SR
Cisco ASR9k
Juniper MX
SD-WAN
Network Automation
Python
Ansible
Rollout Management
Agentic automation
English
fluent
German
conversational
Hungarian
native

Einsatzorte

Einsatzorte

Budapest (+500km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 years 4 months
2024-03 - now

Global Enterprise Networks

Network Project Manager (part-time) IT Project Management Rollout Management Supplier Management
Network Project Manager (part-time)
  • Project manager for 40+ network demands across 25+ countries (Europe, Americas, APAC) - from assessment and site survey through offers, ordering, change management, implementation, documentation and handover.
  • Supplier and stakeholder alignment: BT (managed network), Wipro, Cancom - offer requests, CRQ handling, quality-gate and design sign-off.
  • Budget per demand: BOM creation, supplier-quote review, board approvals, procurement and order tracking.
  • New-site rollouts (Kärcher Centers Maribor/Split/Ni?, Rennes, Argentina, China KTC Phase III) and post-acquisition integrations (Australia, Spain).
IT Project Management Rollout Management Supplier Management
Kärcher (Alfred Kärcher SE & Co. KG)
Remote
2 years 6 months
2024-01 - now

5G SA Roaming Transport Design - SEPP / N32 over IPX

Network / Transport Architect 5G SA SEPP N32 ...
Network / Transport Architect
Designed the IP transport carrying 5G SA control-plane roaming signaling between A1's SEPP and roaming partners across the IPX/GRX network. Scope covered the N32 reference point - N32-c capability negotiation and N32-f signaling (HTTP/2 over TLS with PRINS application-layer protection) - SEPP placement at the PLMN security edge, BGP peering with IPX carriers, routing, redundancy and capacity planning, and alignment of topology-hiding and message filtering between the transport and security layers. Lab-qualified inter-PLMN connectivity and roaming reachability.
5G SA SEPP N32 IPX/GRX BGP IP/MPLS Inter-PLMN Roaming
A1 Telekom Austria
3 years 2 months
2023-05 - now

IP/MPLS Transport

Network Architect IP/MPLS BGP MPLS L3VPN ...
Network Architect
  • Architect on A1's IP/MPLS core - Nokia 7750 SR and Cisco ASR9k carrying fixed and mobile traffic.
  • Lead architect for the IPX/GRX platform: BGP peering with IPX carriers; designed A1's 5G SA control-plane roaming transport (SEPP).
  • Designed the virtualised PE setup (Nokia vSR, Cisco 8000v) so new PoPs come up without rolling a physical chassis.
  • Designed and lab-tested 5G SA mobile-core transport: GTP proxy and SEPP for inter-PLMN signalling security.
  • Represent A1 in GSMA's Networks Group (IPX); daily contact with Nokia and Cisco engineering on bugs and feature gaps.
IP/MPLS BGP MPLS L3VPN MPLS L2VPN Nokia vSR Cisco 8000v
A1 Austria
Remote / Vienna
2 years 1 month
2021-01 - 2023-01

design across LAN, WLAN and SD-WAN

Responsible Designer / Design Lead
Responsible Designer / Design Lead
  • Lead designer across LAN, WLAN and SD-WAN (Cisco Viptela, Nokia Nuage, Meraki) for multinational customers.
  • Wrote HLD/LLD documents and presented them to customer architects; technical consultant across pre-sales and delivery.
British Telecom, Hungary
2 years
2020-01 - 2021-12

Fixed/Mobile Converged Operations

IP & Transmission Operations Manager IP Networks Transmission Network Operations
IP & Transmission Operations Manager
  • Ran a 14-engineer team for fixed, mobile and enterprise IP, office IP (firewalls, load balancers) and nationwide DWDM/microwave transmission.
  • Reorganised the team for fixed-mobile converged operations after the UPC merger; owned the CAPEX/OPEX budget.
IP Networks Transmission Network Operations
Vodafone, Hungary
Budapest, Hungary
12 years 1 month
2008-12 - 2020-12

Designed and evolved DIGI's IP/MPLS backbone

Principal Network Engineer; Backbone Team Manager (from 2016) IP/MPLS Multicast VPN Inter-AS ...
Principal Network Engineer; Backbone Team Manager (from 2016)
  • Designed and evolved DIGI's IP/MPLS backbone; technical lead on network integration during acquisitions and mergers.
  • Built the nationwide Digital TV multicast VPN and the Inter-AS mVPN for DTV distribution; IPTV over mVPN; mobile RAN backhaul over MPLS-TP.
  • Delivered MPLS L2VPN/L3VPN and IPsec services; introduced GPON, DOCSIS and Carrier Ethernet; ran peering and RIPE allocations; DWDM capacity planning.
IP/MPLS Multicast VPN Inter-AS Carrier Ethernet
DIGI (RCS & RDS)
Budapest, Hungary

Aus- und Weiterbildung

Aus- und Weiterbildung

2 years 9 months
2003-09 - 2006-05

BSc, Computer Engineering

College of Dunaújváros (University of Applied Sciences)
College of Dunaújváros (University of Applied Sciences)

Position

Position

Senior Network Architect and IT Network Project Manager, freelance via Bitbucket Kft. Open to service-provider IP/MPLS, 5G SA and mobile transport, network architecture and design, and IT/network project management. Remote (EU).

Kompetenzen

Kompetenzen

Top-Skills

IP/MPLS Network Architecture IT Project Management BGP MPLS L3VPN MPLS L2VPN Multicast VPN OSPF IS-IS Inter-AS 5G SA GTP SEPP IPX/GRX Nokia 7750 SR Cisco ASR9k Juniper MX SD-WAN Network Automation Python Ansible Rollout Management Agentic automation

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Network architect with 20+ years in IP/MPLS, mostly on the service-provider side. Currently with A1 Austria on their IP/MPLS transport - the virtual PE rollout (Nokia vSR, Cisco 8000v) and 5G SA mobile-core (GTP proxy, SEPP). In parallel, project manager for Kärcher's global enterprise network programme: site rollouts, hardware lifecycle, supplier and budget management across 25+ country organisations. Earlier: principal engineer and backbone team manager at DIGI, IP/transmission operations manager at Vodafone Hungary, and design lead at BT for SD-WAN, LAN and WLAN. JNCIP-SP. Comfortable across BGP, MPLS L2/L3VPN, multicast VPN, and mobile backhaul.


CORE COMPETENCIES

  • IP/MPLS Core
  • BGP & Routing
  • MPLS L2/L3VPN
  • Multicast VPN
  • 5G SA Transport
  • Network Automation
  • Multi-Vendor (Nokia/Cisco/Juniper)
  • Network Project Management


SKILLS

  • Routing & MPLS: BGP, OSPF, IS-IS, MPLS L2VPN (VPLS/VPWS), L3VPN, RSVP-TE, LDP, MPLS-TP, Inter-AS A/B/C
  • Multicast & Mobile: PIM-SM/SSM, mVPN (Rosen, NG-MVPN), 4G/LTE, EPC, IMS, 5G SA (GTP proxy, SEPP), IPX/GRX
  • Vendor Platforms: Nokia 7750 SR / 7210 / vSR, Cisco ASR9k / Nexus / Catalyst / ASA, Juniper PTX / MX / EX, Huawei NE40E
  • Access & SD-WAN: GPON, DOCSIS, Carrier Ethernet, DWDM; Cisco Viptela, Meraki, Nokia Nuage
  • Automation & Infra: Python, Bash, Ansible, Terraform, Linux, KVM/OpenStack, VMware, Docker, Kubernetes
  • Project & Delivery: HLD/LLD, multi-country rollouts, supplier & budget management, vendor PoCs


PROJECTS

  • A1 Austria - Virtualised PE Rollout: New PoPs come up without rolling a physical chassis (Nokia vSR, Cisco 8000v) - faster, cheaper edge expansion.
  • DIGI - Nationwide Digital TV Multicast VPN: Built the Inter-AS mVPN for nationwide DTV distribution plus IPTV delivery over mVPN.
  • Kärcher - Global Enterprise Network Programme: PM for 40+ demands across 25+ countries: site rollouts, hardware lifecycle, post-acquisition integrations, supplier and budget management.
  • Vodafone - Fixed-Mobile Converged Operations: Reorganised a 14-engineer operations team for FMC after the UPC merger (TSA programme).

Branchen

Branchen

  • Telecommunications (primary)
  • Internet / ISP
  • IT Services / IT Consulting
  • Enterprise Networking

Einsatzorte

Einsatzorte

Budapest (+500km)
Deutschland, Schweiz, Österreich
möglich

Projekte

Projekte

2 years 4 months
2024-03 - now

Global Enterprise Networks

Network Project Manager (part-time) IT Project Management Rollout Management Supplier Management
Network Project Manager (part-time)
  • Project manager for 40+ network demands across 25+ countries (Europe, Americas, APAC) - from assessment and site survey through offers, ordering, change management, implementation, documentation and handover.
  • Supplier and stakeholder alignment: BT (managed network), Wipro, Cancom - offer requests, CRQ handling, quality-gate and design sign-off.
  • Budget per demand: BOM creation, supplier-quote review, board approvals, procurement and order tracking.
  • New-site rollouts (Kärcher Centers Maribor/Split/Ni?, Rennes, Argentina, China KTC Phase III) and post-acquisition integrations (Australia, Spain).
IT Project Management Rollout Management Supplier Management
Kärcher (Alfred Kärcher SE & Co. KG)
Remote
2 years 6 months
2024-01 - now

5G SA Roaming Transport Design - SEPP / N32 over IPX

Network / Transport Architect 5G SA SEPP N32 ...
Network / Transport Architect
Designed the IP transport carrying 5G SA control-plane roaming signaling between A1's SEPP and roaming partners across the IPX/GRX network. Scope covered the N32 reference point - N32-c capability negotiation and N32-f signaling (HTTP/2 over TLS with PRINS application-layer protection) - SEPP placement at the PLMN security edge, BGP peering with IPX carriers, routing, redundancy and capacity planning, and alignment of topology-hiding and message filtering between the transport and security layers. Lab-qualified inter-PLMN connectivity and roaming reachability.
5G SA SEPP N32 IPX/GRX BGP IP/MPLS Inter-PLMN Roaming
A1 Telekom Austria
3 years 2 months
2023-05 - now

IP/MPLS Transport

Network Architect IP/MPLS BGP MPLS L3VPN ...
Network Architect
  • Architect on A1's IP/MPLS core - Nokia 7750 SR and Cisco ASR9k carrying fixed and mobile traffic.
  • Lead architect for the IPX/GRX platform: BGP peering with IPX carriers; designed A1's 5G SA control-plane roaming transport (SEPP).
  • Designed the virtualised PE setup (Nokia vSR, Cisco 8000v) so new PoPs come up without rolling a physical chassis.
  • Designed and lab-tested 5G SA mobile-core transport: GTP proxy and SEPP for inter-PLMN signalling security.
  • Represent A1 in GSMA's Networks Group (IPX); daily contact with Nokia and Cisco engineering on bugs and feature gaps.
IP/MPLS BGP MPLS L3VPN MPLS L2VPN Nokia vSR Cisco 8000v
A1 Austria
Remote / Vienna
2 years 1 month
2021-01 - 2023-01

design across LAN, WLAN and SD-WAN

Responsible Designer / Design Lead
Responsible Designer / Design Lead
  • Lead designer across LAN, WLAN and SD-WAN (Cisco Viptela, Nokia Nuage, Meraki) for multinational customers.
  • Wrote HLD/LLD documents and presented them to customer architects; technical consultant across pre-sales and delivery.
British Telecom, Hungary
2 years
2020-01 - 2021-12

Fixed/Mobile Converged Operations

IP & Transmission Operations Manager IP Networks Transmission Network Operations
IP & Transmission Operations Manager
  • Ran a 14-engineer team for fixed, mobile and enterprise IP, office IP (firewalls, load balancers) and nationwide DWDM/microwave transmission.
  • Reorganised the team for fixed-mobile converged operations after the UPC merger; owned the CAPEX/OPEX budget.
IP Networks Transmission Network Operations
Vodafone, Hungary
Budapest, Hungary
12 years 1 month
2008-12 - 2020-12

Designed and evolved DIGI's IP/MPLS backbone

Principal Network Engineer; Backbone Team Manager (from 2016) IP/MPLS Multicast VPN Inter-AS ...
Principal Network Engineer; Backbone Team Manager (from 2016)
  • Designed and evolved DIGI's IP/MPLS backbone; technical lead on network integration during acquisitions and mergers.
  • Built the nationwide Digital TV multicast VPN and the Inter-AS mVPN for DTV distribution; IPTV over mVPN; mobile RAN backhaul over MPLS-TP.
  • Delivered MPLS L2VPN/L3VPN and IPsec services; introduced GPON, DOCSIS and Carrier Ethernet; ran peering and RIPE allocations; DWDM capacity planning.
IP/MPLS Multicast VPN Inter-AS Carrier Ethernet
DIGI (RCS & RDS)
Budapest, Hungary

Aus- und Weiterbildung

Aus- und Weiterbildung

2 years 9 months
2003-09 - 2006-05

BSc, Computer Engineering

College of Dunaújváros (University of Applied Sciences)
College of Dunaújváros (University of Applied Sciences)

Position

Position

Senior Network Architect and IT Network Project Manager, freelance via Bitbucket Kft. Open to service-provider IP/MPLS, 5G SA and mobile transport, network architecture and design, and IT/network project management. Remote (EU).

Kompetenzen

Kompetenzen

Top-Skills

IP/MPLS Network Architecture IT Project Management BGP MPLS L3VPN MPLS L2VPN Multicast VPN OSPF IS-IS Inter-AS 5G SA GTP SEPP IPX/GRX Nokia 7750 SR Cisco ASR9k Juniper MX SD-WAN Network Automation Python Ansible Rollout Management Agentic automation

Produkte / Standards / Erfahrungen / Methoden

PROFESSIONAL SUMMARY

Network architect with 20+ years in IP/MPLS, mostly on the service-provider side. Currently with A1 Austria on their IP/MPLS transport - the virtual PE rollout (Nokia vSR, Cisco 8000v) and 5G SA mobile-core (GTP proxy, SEPP). In parallel, project manager for Kärcher's global enterprise network programme: site rollouts, hardware lifecycle, supplier and budget management across 25+ country organisations. Earlier: principal engineer and backbone team manager at DIGI, IP/transmission operations manager at Vodafone Hungary, and design lead at BT for SD-WAN, LAN and WLAN. JNCIP-SP. Comfortable across BGP, MPLS L2/L3VPN, multicast VPN, and mobile backhaul.


CORE COMPETENCIES

  • IP/MPLS Core
  • BGP & Routing
  • MPLS L2/L3VPN
  • Multicast VPN
  • 5G SA Transport
  • Network Automation
  • Multi-Vendor (Nokia/Cisco/Juniper)
  • Network Project Management


SKILLS

  • Routing & MPLS: BGP, OSPF, IS-IS, MPLS L2VPN (VPLS/VPWS), L3VPN, RSVP-TE, LDP, MPLS-TP, Inter-AS A/B/C
  • Multicast & Mobile: PIM-SM/SSM, mVPN (Rosen, NG-MVPN), 4G/LTE, EPC, IMS, 5G SA (GTP proxy, SEPP), IPX/GRX
  • Vendor Platforms: Nokia 7750 SR / 7210 / vSR, Cisco ASR9k / Nexus / Catalyst / ASA, Juniper PTX / MX / EX, Huawei NE40E
  • Access & SD-WAN: GPON, DOCSIS, Carrier Ethernet, DWDM; Cisco Viptela, Meraki, Nokia Nuage
  • Automation & Infra: Python, Bash, Ansible, Terraform, Linux, KVM/OpenStack, VMware, Docker, Kubernetes
  • Project & Delivery: HLD/LLD, multi-country rollouts, supplier & budget management, vendor PoCs


PROJECTS

  • A1 Austria - Virtualised PE Rollout: New PoPs come up without rolling a physical chassis (Nokia vSR, Cisco 8000v) - faster, cheaper edge expansion.
  • DIGI - Nationwide Digital TV Multicast VPN: Built the Inter-AS mVPN for nationwide DTV distribution plus IPTV delivery over mVPN.
  • Kärcher - Global Enterprise Network Programme: PM for 40+ demands across 25+ countries: site rollouts, hardware lifecycle, post-acquisition integrations, supplier and budget management.
  • Vodafone - Fixed-Mobile Converged Operations: Reorganised a 14-engineer operations team for FMC after the UPC merger (TSA programme).

Branchen

Branchen

  • Telecommunications (primary)
  • Internet / ISP
  • IT Services / IT Consulting
  • Enterprise Networking

Vertrauen Sie auf Randstad

Im Bereich Freelancing
Im Bereich Arbeitnehmerüberlassung / Personalvermittlung

Fragen?

Rufen Sie uns an +49 89 500316-300 oder schreiben Sie uns:

Das Freelancer-Portal

Direktester geht's nicht! Ganz einfach Freelancer finden und direkt Kontakt aufnehmen.