📍 Job Overview

Job Title: Network Engineer
Company: Telefónica Tech
Location: Cambridge, Cambridgeshire, United Kingdom
Job Type: On-site, Full-time
Category: Network Infrastructure & Security
Date Posted: June 17, 2025
Experience Level: Mid-level (2-5 years)
Remote Status: On-site

🚀 Role Summary

Manage and maintain network infrastructure, perimeter security systems, and network management platforms.
Troubleshoot complex network issues, optimize network performance, and ensure maximum scalability.
Collaborate with various departments and coordinate with third-party suppliers and partners.
Prepare regular reports on network performance, availability, and security.

📝 Enhancement Note: This role requires a strong background in enterprise-level network management, with a focus on Cisco, HPE, and Aruba technologies. Familiarity with firewall technologies, particularly Fortinet and Cisco, is also essential.

💻 Primary Responsibilities

Network Infrastructure Management: Maintain and support network infrastructure, including LAN, WAN, WLAN, firewalls, and application/VPN services.
Troubleshooting & Optimization: Troubleshoot complex network issues, identify bottlenecks, and implement solutions to ensure optimal network performance and scalability.
Network Documentation & Reporting: Maintain accurate network documentation, including network diagrams, configurations, and inventory records. Prepare regular reports on network performance, availability, and security.
Vendor Coordination: Liaise with various departments within the business and coordinate with third-party suppliers and partners to support, maintain, and implement network systems.
Continuous Improvement: Continuously improve network infrastructure based on changing demands and best practices.

📝 Enhancement Note: This role requires a proactive approach to network management, with a focus on proactive monitoring, troubleshooting, and optimization to minimize downtime and ensure high network performance.

🎓 Skills & Qualifications

Education: Relevant degree or certification in Network Engineering, Computer Science, or a related field.

Experience: Proven experience (2-5 years) in enterprise-level network management, with a focus on Cisco, HPE, and Aruba technologies.

Required Skills:

Experience in enterprise LAN/WAN/WLAN management
Proficiency in Cisco, HPE, and Aruba technologies
Experience with firewall technologies, particularly Fortinet and Cisco
Experience with network monitoring, troubleshooting, and management tools

Preferred Skills:

Cisco certification (CCNA, CCNP, etc.)
Fortinet certification (FCNSA, FCT, etc.)
Aruba certification (ACMP, ACSP, etc.)

📝 Enhancement Note: While certifications are not required, they are highly desirable and demonstrate a commitment to professional development in network engineering.

📊 Network Portfolio & Project Requirements

Portfolio Essentials:

Case studies demonstrating network infrastructure design, implementation, and optimization
Examples of network troubleshooting, including complex issues and resolution strategies
Documentation of network diagrams, configurations, and inventory records
Performance reports showcasing network availability, security, and performance metrics

Technical Documentation:

Detailed network diagrams and configurations, including routing protocols, switching, and firewall rules
Network inventory records, including hardware and software versions
Network performance metrics and optimization strategies
Network security policies and procedures

📝 Enhancement Note: A well-structured network portfolio will demonstrate the candidate's ability to manage and maintain complex network infrastructure, as well as their understanding of network performance optimization and security best practices.

💵 Compensation & Benefits

Salary Range: £35,000 - £45,000 per annum (Based on market research for mid-level network engineering roles in Cambridge, UK)

Benefits:

Competitive salary and benefits package
Opportunities for professional development and career progression
24/7 on-call rotation (rotational basis)
Security clearance requirements may apply (BPSS, including criminal record check)

Working Hours: Full-time (40 hours per week), with on-call rotation for 24/7 network support

📝 Enhancement Note: The salary range provided is based on market research for mid-level network engineering roles in Cambridge, UK. The actual salary may vary depending on the candidate's experience and qualifications.

🎯 Team & Company Context

🏢 Company Culture

Industry: Telefónica Tech is a leading NextGen Tech solutions provider, serving over 5.5 million customers daily in over 175 countries. They specialize in cloud, data & AI, enterprise applications, digital workplace, and cybersecurity & networking.

Company Size: Telefónica Tech has a highly diversified team of over 6,000 exceptionally skilled employees and +60 nationalities, with global strategic hubs in Spain, Brazil, the UK, and Germany.

Founded: Telefónica Tech is part of the Telefónica Group, which was founded in 1924.

Team Structure:

Network Engineering team, responsible for managing and maintaining network infrastructure, perimeter security systems, and network management platforms.
Collaboration with various departments within the business, including IT, cybersecurity, and customer support.
Coordination with third-party suppliers and partners to support, maintain, and implement network systems.

Development Methodology:

Agile/Scrum methodologies for network project management and sprint planning.
Regular code reviews, testing, and quality assurance practices for network configuration and management.
Deployment strategies, including CI/CD pipelines and server management, to ensure optimal network performance and security.

Company Website: https://www.telefonicatech.com/

📝 Enhancement Note: Telefónica Tech's global presence and diverse team provide ample opportunities for career growth and exposure to international network engineering projects.

📈 Career & Growth Analysis

Network Engineer Career Level: This role is suited for a mid-level network engineer with 2-5 years of experience in enterprise-level network management. The primary responsibilities include managing, maintaining, and optimizing network infrastructure, as well as troubleshooting complex network issues.

Reporting Structure: The network engineer will report directly to the network manager or team lead, collaborating with various departments within the business and coordinating with third-party suppliers and partners.

Technical Impact: The network engineer will have a significant impact on network performance, security, and availability, ensuring optimal user experience and minimal downtime for customers and internal users.

Growth Opportunities:

Senior Network Engineer: With increased experience and expertise, the network engineer can progress to a senior role, focusing on network architecture, design, and strategic decision-making.
Network Manager/Team Lead: As the network engineer gains leadership experience, they may advance to a management role, overseeing a team of network engineers and driving network projects and initiatives.
Specialization: The network engineer can specialize in specific network technologies, such as cloud networking, security, or wireless networking, to further develop their expertise and career prospects.

📝 Enhancement Note: Telefónica Tech's global presence and diverse team provide ample opportunities for career growth and exposure to international network engineering projects. The network engineer can progress to senior roles, management positions, or specialize in specific network technologies to advance their career.

🌐 Work Environment

Office Type: Telefónica Tech's Cambridge office is a modern, collaborative workspace designed to foster innovation and teamwork.

Office Location(s): Cambridge, Cambridgeshire, United Kingdom

Workspace Context:

Collaborative Workspace: The office features open-plan workspaces, encouraging collaboration and communication among team members.
Network Infrastructure: The office is equipped with state-of-the-art network infrastructure, including high-speed connectivity, wireless networking, and advanced security systems.
Work-Life Balance: The office provides a flexible work-life balance, with opportunities for remote work and flexible hours.

Work Schedule: Full-time (40 hours per week), with on-call rotation for 24/7 network support. The work schedule may vary depending on project demands and maintenance windows.

📝 Enhancement Note: Telefónica Tech's Cambridge office provides a modern, collaborative workspace designed to foster innovation and teamwork. The office is equipped with state-of-the-art network infrastructure, ensuring optimal performance and security for network engineers.

📄 Application & Technical Interview Process

Interview Process:

Phone/Video Screen: A brief phone or video call to discuss the candidate's experience, qualifications, and career goals.
Technical Assessment: A hands-on technical assessment, focusing on network infrastructure design, implementation, and troubleshooting. The assessment may include live network simulations and case studies.
Behavioral Interview: A structured interview focusing on the candidate's problem-solving skills, communication, and teamwork.
Final Interview: A final interview with the network manager or team lead to discuss the candidate's fit for the role and the team.

Portfolio Review Tips:

Highlight network infrastructure design, implementation, and optimization projects.
Include examples of network troubleshooting, including complex issues and resolution strategies.
Provide detailed network diagrams, configurations, and inventory records.
Showcase network performance metrics and optimization strategies.

Technical Challenge Preparation:

Brush up on network infrastructure design, implementation, and troubleshooting skills.
Familiarize oneself with Cisco, HPE, and Aruba technologies, as well as firewall technologies, particularly Fortinet and Cisco.
Prepare for live network simulations and case studies, focusing on problem-solving, communication, and teamwork.

ATS Keywords: (Organized by category)

Network Infrastructure: LAN, WAN, WLAN, routing, switching, firewalls, VPN, network management, network monitoring, network troubleshooting
Technologies: Cisco, HPE, Aruba, Fortinet, network management platforms
Skills: Network design, network implementation, network optimization, network security, network documentation, network reporting, vendor coordination, continuous improvement
Industry Terms: Network Engineer, Second Line Support, Level 2 Support, CCNA, CCNP, Cisco Certified Network Associate, Cisco Certified Network Professional

📝 Enhancement Note: Telefónica Tech's interview process focuses on the candidate's technical skills, problem-solving abilities, and cultural fit. The portfolio review and technical challenge preparation tips provide actionable insights to help candidates succeed in the interview process.

🛠 Technology Stack & Network Infrastructure

Network Infrastructure Technologies:

Cisco: Cisco routers, switches, and wireless access points for enterprise-level network management.
HPE: HPE servers, storage, and networking equipment for data center and cloud infrastructure.
Aruba: Aruba wireless networking solutions for secure and high-performance wireless networks.
Fortinet: Fortinet firewalls and security appliances for perimeter security and network segmentation.

Network Management Platforms:

Cisco Prime Infrastructure: A unified management platform for Cisco network devices, providing network management, monitoring, and troubleshooting capabilities.
HPE Intelligent Management Center (IMC): A network management platform for HPE network devices, offering network management, monitoring, and automation features.
Aruba Central: A cloud-based network management platform for Aruba wireless networking solutions, providing network management, monitoring, and security features.
Fortinet FortiManager: A centralized management platform for Fortinet firewalls and security appliances, offering network security management, policy-based management, and automated deployment.

📝 Enhancement Note: Telefónica Tech's network infrastructure is built on enterprise-level technologies from Cisco, HPE, Aruba, and Fortinet. Familiarity with these technologies is essential for the network engineer role.

👥 Team Culture & Values

Network Engineering Values:

Performance: Focus on optimal network performance, scalability, and availability to ensure high-quality user experience.
Security: Prioritize network security, implementing robust security measures to protect network infrastructure and user data.
Collaboration: Foster a collaborative work environment, encouraging teamwork and knowledge sharing among network engineers.
Continuous Improvement: Embrace a culture of continuous learning and improvement, staying up-to-date with emerging network technologies and best practices.

Collaboration Style:

Cross-Functional Integration: Collaborate with various departments within the business, including IT, cybersecurity, and customer support, to ensure optimal network performance and security.
Code Review Culture: Participate in regular code reviews and knowledge-sharing sessions to improve network configuration and management practices.
Peer Programming: Collaborate with other network engineers on complex network projects and troubleshooting cases to leverage collective expertise and experience.

📝 Enhancement Note: Telefónica Tech's network engineering team values performance, security, collaboration, and continuous improvement. The team fosters a collaborative work environment, encouraging teamwork and knowledge sharing among network engineers.

📌 Application Steps

To apply for the Network Engineer position at Telefónica Tech:

Submit your application through the application link provided.
Customize your resume and portfolio, highlighting your network infrastructure design, implementation, and troubleshooting projects, as well as your experience with Cisco, HPE, Aruba, and Fortinet technologies.
Prepare for the phone/video screen, technical assessment, behavioral interview, and final interview by brushing up on your network engineering skills and familiarizing yourself with the company's network infrastructure and technologies.
Research Telefónica Tech's company culture, values, and network engineering team to ensure a strong cultural fit and alignment with the company's mission and goals.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and network engineering industry-standard assumptions. All details should be verified directly with Telefónica Tech before making application decisions.

Network Engineer