Network Designer
Posted 2 days ago by Hydrogen Group
£530 Per day
Inside
Hybrid
England, United Kingdom
Summary: The IP Network Designer role focuses on designing and supporting IP network infrastructure, particularly in large-scale service provider environments. The position emphasizes hands-on experience with DNS (Infoblox) and modern IP infrastructure, requiring a strong background in IP networking. The role is design-heavy, ideal for candidates who enjoy ownership and solving complex network challenges. The contract is until September 30, 2026, with a preference for candidates based in Leeds.
Key Responsibilities:
- Produce high & low-level IP network designs
- Design and support DNS/DHCP platforms (Infoblox preferred)
- Ensure network scalability, resilience & performance
- Support service migrations and new service integration
- Review vendor releases, bugs, and security advisories
- Work closely with vendors, architecture, and operations teams
- Own documentation: HLDs, LLDs, test plans, implementation plans
Key Skills:
- Strong IP networking background (service provider preferred)
- Proven DNS & DHCP experience (recent, hands-on)
- Experience with Infoblox (or similar DNS platforms)
- Solid knowledge of IP protocols (BGP, OSPF, MPLS, etc.)
- Hands-on experience with Cisco and/or Juniper
- Experience producing network design documentation
- Strong stakeholder communication skills
- Background in telecoms / mobile network operator environments (highly desirable)
- Experience with RADIUS, QoS, DNS architecture (highly desirable)
- Exposure to large-scale migrations and transformation projects (highly desirable)
Salary (Rate): £530/day
City: Leeds
Country: United Kingdom
Working Arrangements: hybrid
IR35 Status: inside IR35
Seniority Level: undetermined
Industry: IT
IP Network Designer (DNS / Infoblox) – Contract
Leeds (preferred) | London / Reading / Remote (UK-based)
Up to £530/day (Umbrella)
Contract until 30 Sept 2026
*Important* We have already seen candidates rejected due to outdated DNS/Infoblox experience, recent, hands-on expertise is essential.
We are working with our client on a brand-new opportunity for an IP Network Designer / Technical Design Authority (TDA) to join their Connectivity Engineering team. This is a critical role focused on IP network design across large-scale service provider environments, with a strong emphasis on DNS (Infoblox) and modern IP infrastructure.
The Role
You will be responsible for designing, evolving, and supporting the IP network estate, including:
- Mobile MPLS Core
- Data centres & internet connectivity
- Remote access platforms
- Large-scale enterprise network infrastructure
This is a design-heavy role, not just operations, ideal for someone who enjoys ownership, architecture input, and solving complex network challenges.
Key Responsibilities:
- Produce high & low-level IP network designs
- Design and support DNS/DHCP platforms (Infoblox preferred)
- Ensure network scalability, resilience & performance
- Support service migrations and new service integration
- Review vendor releases, bugs, and security advisories
- Work closely with vendors, architecture, and operations teams
- Own documentation: HLDs, LLDs, test plans, implementation plans
What we are looking for
Essential:
- Strong IP networking background (service provider preferred)
- Proven DNS & DHCP experience (recent, hands-on)
- Experience with Infoblox (or similar DNS platforms)
- Solid knowledge of IP protocols (BGP, OSPF, MPLS, etc.)
- Hands-on experience with Cisco and/or Juniper
- Experience producing network design documentation
- Strong stakeholder communication skills
Highly Desirable:
- Background in telecoms / mobile network operator environments
- Experience with RADIUS, QoS, DNS architecture
- Exposure to large-scale migrations and transformation projects
Working Setup
Leeds preferred (flexible for strong candidates)
Hybrid: occasional office visits - 2x a week but flexible
Some out-of-hours work for network changes