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Core Network Architect

Job in Cardiff, Cardiff City Area, CF10, Wales, UK
Listing for: Nasstar
Full Time position
Listed on 2026-09-23
Job specializations:
  • IT/Tech
    Systems Engineer, Cybersecurity, Network Engineer
Job Description & How to Apply Below
Overview

Duration: 6 months. Department:
Connectivity.

Location:

Remote, UK. Rate:
Negotiable. Role is outside IR35.

Responsibilities
  • A varied role to provide support to the Nasstar Core Network and Security Services.
  • Be agile in managing workload and constantly re-evaluating priorities.
  • Design, implement, and maintain the backbone infrastructure of Nasstar's network.
  • Perform proactive tasks to maximise Core network uptime and prevent recurring issues, including resolving monitoring alerts, deploying security updates, systems maintenance and upgrading customer systems.
  • Opportunity to work with the latest technologies in an agile environment that promotes systems and service excellence.
Key Responsibilities
  • Design and development of core network architecture.
  • Implement best practices for network security, including risk mitigation strategies.
  • Migration of services from legacy environments to Nasstar's new core network.
  • Strong troubleshooting and problem-solving abilities.
  • Embrace continual change and process improvement.
  • Clear and concise communication.
  • Plan and manage own workflow to achieve KPIs.
  • Mentor Junior Core Engineers.
  • Proactively keep up to date with technologies supported by Nasstar.
  • Self-starter with minimal day-to-day supervision.
Skills, Knowledge and Expertise Education & Qualifications
  • Essential: JNCIP-SP
  • Desirable: JNCIE
Experience & Capabilities
  • Experience with in a Service Provider environment.
  • Strong Core Network Design.
  • Juniper, Cisco and Fortinet hands-on experience.
  • Network Analysis:
    Audit / Recommend / Remediate;
    Traffic Measurement.
  • Network Design:
    Vendor Best Practice; HLD / LLD.
Seniority level
  • Mid-Senior level
Employment type
  • Contract
Job function
  • Information Technology
Industries
  • IT Services and IT Consulting
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