Job Description

Job Title:

Senior Network Engineer - PTP Services, Low Latency Connectivity & Cyber Security

Company:

Hoptroff London Ltd

Job Type:

Full-Time, Permanent

Location:

UK (Hybrid working from London office)

About Hoptroff

Hoptroff is a leading provider of ultra-precise timing solutions for finance, telecommunications, and other high-performance industries. We deliver accurate, resilient, and secure timekeeping services to organisations operating in mission-critical, compliance-driven environments.

We are seeking a Senior Network Engineer to help evolve and protect our global timing network infrastructure. This role plays a critical part in ensuring ultra-low latency delivery, accurate time synchronisation, and robust cybersecurity.

What You'll Do

Time Synchronisation

Deploy and support PTP (IEEE 1588), NTP, and emerging standards such as White Rabbit. Work with GPS/GNSS, PPS, LEO satellite sources, and national time authorities. Configure and troubleshoot PTP grandmaster, boundary, and transparent clocks.

Core Network Engineering

Build and maintain low-latency L2/L3 networks across global environments. Configure high-performance switching platforms (Cisco Nexus). Maintain Cisco Firepower (FMC / FTD) for secure, scalable operations. Configure IPSec tunnels and secure communication protocols. Produce high-quality technical documentation.

Cyber Security & Risk

Manage IDS/IPS systems and lead threat detection/response efforts. Conduct vulnerability assessments, patching, and penetration test coordination. Support ISO27001/ISO9001 compliance and governance activities. Participate in incident response, recovery, and continuity planning.

Collaboration & Support

Work cross-functionally with Software, Systems, and Project teams. Provide expert troubleshooting and participate in an on-call rotation. Monitor latency, performance, and security using advanced tools. Contribute to continuous improvement through learning and innovation.

What We're Looking For

5-10 years' experience in mission-critical or low-latency network environments (finance, telco, MSP, defence). Degree in Computer Science, Networking, Cyber Security, or related field (or equivalent experience). Cisco CCNP/CCIE (Security or Enterprise) strongly preferred. Proven experience delivering NTP/PTP services. Strong low-latency L2/L3 expertise (STP/RSTP/LACP, OSPF, BGP). Multicast experience (IGMP, PIM-SM/SSM, MSDP). Strong Linux CLI + networking tools (tcpdump, wireshark, nmap). Experience with Cisco Nexus & Firepower. Excellent problem-solving and communication skills. Ability to work under pressure and support global operations. Right to live and work in the UK.

Bonus Experience

Network automation (Python, scripting). AWS/GCP networking exposure. Familiarity with White Rabbit timing networks.

What We Offer

Competitive salary + benefits (including EMI share options & private medical). 25 days holiday + company Christmas shutdown. Hybrid working in Shoreditch FinTech hub. Training, certification support, and continuous learning opportunities. Work with cutting-edge technology in global, high-impact environments. Dog-friendly office, social events, and innovative community culture.

Our Values

Precision o Innovation o Collaboration o Trust o Ambition

Equal Opportunity Employer

We welcome applicants from all backgrounds and do not discriminate based on gender, ethnicity, disability, sexual orientation, or any other protected characteristic.

Apply now and help us create certainty through global precision timing.

#NetworkEngineer #SeniorNetworkEngineer #LowLatency #CyberSecurity #CiscoNexus #PTP #NTP #NetworkSecurity #FinTechJobs #UKJobs

Job Types: Full-time, Permanent

Benefits:

Company pension Private medical insurance Sick pay
Ability to commute/relocate:

London EC2A 4DP: reliably commute or plan to relocate before starting work (required)
Application question(s):

What is your current notice period? Please provide a link to your LinkedIn profile To give us a guide, what are your current salary expectations?
Work authorisation:

United Kingdom (required)
Work Location: Hybrid remote in London EC2A 4DP