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ROLE OVERVIEW
We are seeking an experienced Juniper L3/L4 Support Engineer to join a high-performing network operations and support practice. This role is suited to a technically deep, customer-focused professional with 5–10 years of hands-on networking experience and a minimum of 3 years in a TAC or equivalent advanced support function. The successful candidate will own complex fault resolution, drive root cause analysis and serve as the escalation authority for high-priority incidents across Juniper-based enterprise and service provider environments. This role demands a thorough command of Junos, spanning routing, MPLS, data centre and security platforms.
KEY DETAILS
Experience Required
5–10 years in Networking; minimum 3 years in TAC / advanced support
Certifications (Required)
JNCIP-SP — Juniper Networks Certified Internet Professional (SP) (mandatory)
Certifications (Preferred)
JNCIE-SP — Juniper Networks Certified Internet Expert (SP) — highly advantageous
Work Location
Fully Remote — dedicated workspace with reliable, high-speed internet required
Core Working Hours
08:00 – 17:00 (UTC+02:00)
After-Hours Work
Required — maintenance windows and on-call support activities outside standard hours
Travel
May be required from time to time
Industry Background
Service Provider experience is mandatory
KEY RESPOSIBILITIES
● Serve as the L3/L4 escalation point for complex, high-priority incidents across Juniper routing, switching and security platforms.
● Perform structured troubleshooting, root cause analysis and document findings with clear, actionable resolution steps.
● Engage directly with Juniper JTAC on product defects, feature requests and escalation cases, driving cases to closure.
● Design and validate lab reproductions of customer issues to isolate faults and verify fixes prior to production deployment.
● Produce high-quality technical write-ups, known-error articles and post-incident reports for internal and customer consumption.
● Support and advise on network design reviews — identifying risks and proposing improvements aligned to best practice.
● Participate in planned maintenance windows, software upgrades and network change activities outside standard business hours.
● Contribute to knowledge base development; mentor L1/L2 engineers and deliver internal training sessions.
● Collaborate with architecture and pre-sales teams on complex solutions, sizing and customer onboarding.
● Maintain current knowledge of Junos software releases, security advisories and Juniper product roadmap.
REQUIRED CERTIFICATIONS & QUALIFICATIONS
The following Juniper Networks certification is mandatory for this role:
● JNCIP-SP — Juniper Networks Certified Internet Professional, Service Provider (mandatory).
Preferred / Highly Advantageous:
● JNCIE-SP — Juniper Networks Certified Internet Expert, Service Provider (hands-on lab exam)
Additional desirable qualifications: CCNP/CCIE (SP or Enterprise), CISSP or equivalent vendor-neutral credentials.
TECHNICAL COMPETENCY FRAMEWORK
Candidates must demonstrate strong working knowledge across the following technology domains:
Core Networking
• Ethernet & Physical Layer Fundamentals
• VLANs (IEEE 802.1Q) & Spanning Tree (STP/RSTP/MSTP)
• Link Aggregation (LACP / 802.3ad)
• IPv4/IPv6 Addressing, Subnetting & Dual-Stack
• QoS/CoS – Classification, Marking & Hierarchical Scheduling
• MTU, Fragmentation & Path MTU Discovery
• Multicast (IGMP, PIM-SM/SSM/DM)
• Bidirectional Forwarding Detection (BFD)
Routing Protocols
• Static & Floating Static Routes
• OSPFv2/v3 – Design, Configuration & Troubleshooting
• IS-IS – Fundamentals, Advanced Design & Multi-Topology
• BGP – EBGP/IBGP, Attributes, Policy & Optimization
• MP-BGP, Route Reflection & BGP Confederations
• Policy-Based Routing (Filter-Based Forwarding)
• Routing Policies (Communities, Prefix-Lists)
• ECMP & Load Balancing
MPLS & SP Technologies
• MPLS Fundamentals, LDP & RSVP-TE
• Segment Routing (SR-MPLS) & SRv6
• MPLS L3 VPNs (BGP/MPLS IP VPN)
• MPLS L2 VPNs (Martini/Kompella), VPLS & VPWS
• EVPN-MPLS
• MPLS Traffic Engineering Design & Optimization
• Carrier Ethernet (MEF Standards)
Data Centre
• EVPN-VXLAN Fabric Design
• Spine-Leaf Architecture
• MC-LAG & Virtual Chassis / VCF
• Apstra Intent-Based Networking
• Data Centre Interconnect (DCI)
Security
• SRX NGFW – Policy Design & Management
• IPSec VPN (Site-to-Site, Hub-Spoke)
• SSL VPN / Remote Access
• NAT (Source/Destination/Static/PAT)
• AppSecure (AppID/AppFW/AppQoS)
• IPS/IDS & Advanced Threat Prevention (ATP Cloud)
• Zero Trust Architecture
• AAA, RADIUS, TACACS+, 802.1X & PKI
Service Provider Solutions
• Carrier-Grade NAT (CGNAT & HA)
• Broadband Network Gateway (BNG) & Subscriber Management
• MPLS Core & Edge Routing (PE Design)
• Internet Peering (IXP, Route Servers)
• Transit Design & Provider Selection
• Mobile Backhaul & 5G Transport
• Gi-LAN Architecture
Automation & Programmability
• Junos Automation Scripts (Op/Event/Commit, SLAX)
• NETCONF, REST API & gRPC/gNMI
• Ansible for Junos & Juniper PyEZ
• Python for Network Automation & JSNAPy
• Version Control
Cloud & Virtualisation
• vSRX, vMX & cSRX Deployments
• Cloud-Native Router (CN2) & Kubernetes Networking
• AWS (Transit Gateway, Direct Connect)
• Azure (ExpressRoute, vWAN)
• Google Cloud (Cloud Interconnect)
• Hybrid Cloud Connectivity Design
• OpenStack Integration
Operations & Monitoring
• Junos CLI Proficiency & Operational Commands
• Syslog, SNMP & Streaming Telemetry (JTI)
• Network Analytics (Paragon Insights / Healthbot)
• Packet Capture & Traffic Analysis
• Structured Troubleshooting Methodology
• Root Cause Analysis
• Performance Optimisation & Tuning
High Availability
• Graceful Restart (GR) & Nonstop Routing (NSR/NSA)
• In-Service Software Upgrade (ISSU)
• Graceful Routing Engine Switchover (GRES)
• Chassis Clustering (SRX HA)
• HA Design Principles
Optical & Transport
• IP over DWDM
• OTN (Optical Transport Network)
• Metro Ethernet Transport
• Transport Network Integration
Architecture & Design
• Enterprise & ISP Network Architecture
• Data Centre Network Architecture
• Security Architecture Design
• WAN Design & SD-WAN Integration (Session Smart Routing)
• Capacity Planning & Migration Strategy
TAC & ADVANCED SUPPORT EXPERIENCE
A minimum of 3 years in a TAC or equivalent advanced technical support function is required. This experience should demonstrate:
● Ownership and resolution of P1/P2 incidents in production service provider or enterprise environments.
● Direct engagement with vendor TAC (Juniper JTAC or equivalent) for software defect escalation and workaround management.
● Lab reproduction and validation of complex, multi-vendor network faults.
● Authoring of detailed technical RCAs, known-error articles and customer-facing post-incident reports.
● Participation in change advisory board (CAB) processes and execution of high-risk network changes.
WORKING ARRANGEMENTS
This is a fully remote position. The successful candidate is expected to maintain a professional, dedicated home workspace equipped with reliable, high-speed internet connectivity throughout all working hours. Standard core hours are 08:00–17:00 UTC+02:00; however, the nature of L3/L4 support requires flexibility — participation in after-hours maintenance windows and emergency support activities will be necessary from time to time. Occasional travel to customer sites or company premises may also be required in support of project delivery or strategic engagements.
PERSONAL ATTRIBUTES & SOFT SKILLS
● Structured, methodical troubleshooter who documents clearly and communicates findings concisely to technical and non-technical audiences.
● Customer-focused and professional under pressure — able to manage customer expectations during high-severity incidents.
● Self-driven with strong time management; capable of handling multiple concurrent cases and escalations without oversight.
● Collaborative team player who contributes to knowledge sharing, mentoring and continuous improvement of support processes.
● Meticulous technical writer; produces documentation and design reviews that are accurate, reproducible and auditable.
EQUAL OPPORTUNITIES
We are an equal opportunity employer and are committed to creating a diverse and inclusive workplace. We welcome applications from all qualified individuals regardless of age, disability, gender, race, religion or sexual orientation.
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