Network Engineer

Visa; Greater London; On-site; GBP 65,000 - 85,000; Full time

Job summary

Visa is seeking a Senior Network Engineer to design and support enterprise WAN, LAN, and wireless networks. The role requires at least 5 years of experience in network engineering and expertise in routing protocols such as BGP and OSPF.

The ideal candidate will collaborate with various teams to enhance network performance, security, and operational efficiency. Being part of Visa means participating in impactful work that shapes payment technology globally.

Qualifications

• Minimum of 5 years of experience in enterprise network engineering.
• Advanced knowledge of enterprise WAN, LAN, wireless, and TCP/IP networking.
• Advanced experience with Cisco VPN networking.

Responsibilities

• Design and implement enterprise WAN, LAN, and wireless network solutions.
• Provide third-level technical support for complex network incidents.
• Collaborate with Information Security to ensure compliance.

Skills

Expert-level knowledge of routing protocols (BGP, OSPF)

Advanced understanding of Cisco routing and switching

Strong troubleshooting, planning, and problem-solving skills

Excellent written and verbal communication skills

Education

Bachelor’s degree in engineering or equivalent professional experience

Tools

Cisco

Python

Arista

MPLS

Job description

About Us

Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.

At Visa, you'll have the opportunity to create impact at scale — tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world.

Join Visa and do work that matters – to you, to your community, and to the world. Progress starts with you.

Job Description

Role Overview

The Network Engineer is responsible for the design, implementation, and operational support of enterprise WAN, LAN, wireless, and secure connectivity solutions within a corporate network environment. This role has the responsibility for the technical delivery of complex network initiatives, provides advanced troubleshooting expertise, and ensures solutions are implemented reliably, securely, and in alignment with established enterprise architecture standards.

The Senior Network Engineer operates with minimal supervision, collaborates closely with Security, Project, and Operations teams, and plays a key role in improving network stability, performance, and operational efficiency.

Key Responsibilities

Network Design & Implementation

• Design, plan, and implement enterprise WAN, LAN, wireless, and remote access network solutions in accordance with approved architecture standards.
• Lead the technical delivery of assigned network projects from detailed design through implementation and operational handoff.
• Create and maintain low‑level network design documentation, including detailed Visio diagrams, implementation plans, and support handover materials.
• Assess network performance and capacity to ensure solutions meet current and near‑term business requirements.

Operations & Advanced Support

• Provide third‑level technical support for complex network incidents, including root cause analysis and permanent corrective actions.
• Analyze network activity and incident trends to identify, remediate, and prevent systemic issues.
• Support major incidents by providing deep technical expertise and coordination with internal teams and vendors.

Security & Compliance

• Collaborate with Information Security to ensure security and compliance requirements are incorporated into all network designs.
• Provide technical assistance for the investigation, analysis, and mitigation of network vulnerability alerts.
• Implement secure networking principles, including segmentation, secure remote access, and policy enforcement.

Vendor & Stakeholder Collaboration

• Work directly with network vendors and service providers to validate designs, troubleshoot complex issues, and support escalations.
• Collaborate with Project Managers, Account Managers, Security, and Network Operations teams to ensure successful end‑to‑end delivery.
• Provide clear technical communication to stakeholders across engineering and support organizations.

Continuous Improvement & Automation

• Research, evaluate, and recommend software and hardware enhancements to improve network reliability, scalability, and performance.
• Use Python and network automation tools to streamline configuration, validation, and troubleshooting tasks.
• Contribute to service improvement plans that enhance operational efficiency and reduce risk.

Knowledge Sharing & Mentorship

• Provide training, guidance, and technical mentorship to network support engineers.
• Contribute to internal knowledge bases, standards, and operational documentation.

Qualifications

Required

• Bachelor’s degree in engineering or equivalent professional experience.
• Minimum of 5 years of experience in enterprise network engineering.
• Expert‑level knowledge of routing protocols (BGP, OSPF).
• Advanced understanding of Cisco routing and switching in large enterprise environments.
• Advanced knowledge of Arista switching.
• Advanced knowledge of enterprise WAN, LAN, wireless, MPLS, and TCP/IP networking.
• Advanced experience with Cisco VPN networking.
• Strong troubleshooting, planning, and problem‑solving skills.
• Excellent written and verbal communication skills.

Preferred

• Experience with SD‑WAN technologies, ideally Silver Peak.
• Working knowledge of SASE solutions.
• Working knowledge of cloud networking concepts, including hybrid connectivity.
• Working knowledge of Python and network automation tools.
• Experience with Citrix NetScaler Access Gateways.
• Knowledge of Unified Communications and MS Teams solutions.
• Cisco certification (e.g., CCNA, CCNP or equivalent experience).

Visa is an EEO Employer

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability or protected veteran status. Visa will also consider for employment qualified applicants with criminal histories in a manner consistent with EEOC guidelines and applicable local law.