Network Core Engineer (Juniper)

Quickline Communications; England; On-site; GBP 50,000 - 70,000; Full time

Job summary

A UK-based internet service provider is seeking a Network Core Engineer to enhance its core network infrastructure. The role involves tackling complex routing challenges and maintaining high availability across Juniper platforms. The ideal candidate will have significant experience in large-scale network engineering, including strong knowledge of IP routing and MPLS. Key benefits include a 5% pension contribution, health cashback scheme, and generous annual leave options, along with a vibrant work culture promoting team engagement.

Benefits

Pension 5% employer / 5% employee contribution

Health Cashback Scheme

25 days annual leave + bank holidays

Option to buy or sell up to 5 additional days annual leave

Enhanced Paternity/Maternity/Adoption leave

High Street Shopping Discount Scheme

Free Parking on site

Regular Lunch & Learns

Social Events

Customer Obsessed Awards

Qualifications

• Proven experience working in large-scale network engineering, focusing on core or backbone networks.
• Strong hands-on experience with Juniper JunOS.
• Experience with BGP in large-scale or service provider environments.

Responsibilities

• Design, implement, and maintain core IP/MPLS network infrastructure using Juniper platforms.
• Troubleshoot complex network issues across layers 2 and 3 in production environments.
• Collaborate with NOC and systems teams on cross-functional initiatives.

Skills

Juniper JunOS

BGP

IP Routing

MPLS

Problem-solving

Job description

Network Core Engineer (Juniper)

We re Quickline, and we believe everyone deserves great internet. Whoever you are, wherever you are and whatever you do online - our customers are at the heart of everything we do. So we re on a mission to provide lightning fast, reliable broadband that reaches the places other providers leave behind.

Our mission relies on a team full of inspiring, customer obsessed people, and we re looking for a Network Core Engineer with strong Juniper expertise to design, operate, and evolve our core network infrastructure.

Could that be you? If tackling complex routing challenges, troubleshooting mission‑critical Juniper networks, and keeping core infrastructure running smoothly gets you out of bed in the morning, and resolving issues before customers ever notice puts a smile on your face, then we would love to find out more about you.

Here s why you ll love this role

• Contribute to design, implement, and maintain core IP/MPLS network infrastructure using Juniper platforms
• Configure, optimize, and troubleshoot Juniper routers (e.g., MX, ACX series)
• Manage and support routing protocols such as BGP, OSPF, and MPLS
• Manage and support CGNAT and BNG platforms.
• Ensure high availability, redundancy, and performance across the core network
• Perform network upgrades, migrations, and capacity planning
• Troubleshoot complex network issues across layers 2 3 in production environments
• Develop and maintain network documentation, standards, and diagrams
• Collaborate with NOC and systems teams on cross‑functional initiatives

Here s why you ll be great in this role

• You will have proven experience working in large‑scale network engineering, with a focus on core or backbone networks
• Strong hands on experience with Juniper JunOS
• Experience with BGP in large‑scale or service provider environments
• Deep understanding of IP routing, MPLS, and traffic engineering
• Excellent communication skills, with a proactive problem‑solving approach

The benefits

• Pension 5% employer / 5% employee contribution.
• Health Cashback Scheme Can claim back prescription, GP and optician charges, therapy allowance, private outpatient consultations, EAP, 24/7 remote GP service, member discounts.
• 25 days annual leave + bank holidays, your birthday, house move and wedding day off.
• Option to buy or sell up to 5 additional days annual leave
• Enhanced Paternity/Maternity/Adoption leave
• High Street Shopping Discount Scheme - Holidays, food and drink, insurance, sport, tech, high street, Ikea, M&S, cinema etc.
• Free Parking on site.
• Regular Lunch & Learns
• Social Events Summer and End of Year parties etc.
• Customer Obsessed Awards - Regular opportunities to win!

Note to agencies

Quickline have an internal recruitment team. We will not accept unsolicited CVs from any source other than directly from a candidate via our Applicant Tracking System ( ATS ). For further information refer to our careers page.

Please note: You must have the right to work in the UK in order to be successfully appointed to this role