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Linux Systems Administrator



Software Engineering, IT
Westminster, London, UK
Posted on Monday, March 11, 2024

The company:

Netcraft is the global leader in cybercrime detection and disruption. We’re a trusted partner for three of the four largest companies in the world, twelve of the fifty largest banks, and five country governments. We’ve blocked almost 200 million malicious sites and perform takedowns on around one-third of the world’s phishing sites.

Our purpose and expertise are focused on just one thing: protecting the world from cybercrime. We carry that passion through into our workplace too. Our people are highly talented, and everyone is valued for their individual contributions. That’s why we make sure Netcraft is a great place to work. From free lunches to wellness to social events; we’ve got you covered.

The role:

Based in either our London, Bath or Manchester office, you’ll be reporting to our DevOps Engineering Team Lead, performing system administration tasks.

Day to day, you’ll be:

  • Performing administration of Linux servers
  • Triaging, and responding to, alerts from systems and services
  • Assisting our engineering and IT teams in debugging networking issues
  • Keeping systems up to date with the latest security patches
  • Ensuring systems have appropriate and functional backups
  • Engaging and liaising with hardware and software vendors
  • Managing our software and hardware licences
  • Administering networking hardware, including firewalls and switches

The reward package:

  • An attractive starting base salary, reviewed annually
  • Flexible and hybrid working options
  • Private health cover with Vitality, including a private GP service
  • Comprehensive wellness provisions
  • Company pension scheme with 4% employer contributions plus NI savings
  • 33 days holiday per year (incl. public holidays)
  • Two days paid Volunteering Leave per year
  • Enhanced family leave benefits
  • Free meals, snacks and drinks in the offices
  • Inclusive culture and environment where you’ll feel genuinely valued and supported

What you’ll need to be successful:

  • Experience administering Linux systems over SSH
  • Strong diagnostic and debugging skills
  • Knowledge of networking and Internet technologies (including IPv4, IPv6, TCP, UDP, DNS, and DHCP)
  • Experience with scripting languages (particularly Bash and Perl)
  • Experience configuring and maintaining networking infrastructure (firewalls, switches, VLAN management, etc.)
  • The ability to identify, and act upon, opportunities for improvement and automation
  • Understanding of cybersecurity principles
  • Absolute integrity and discretion, given your potential level of access to sensitive business data
  • A proactive approach to documentation and knowledge sharing
  • The ability to prioritise multiple tasks of varying urgency, supported by a ticketing system
  • Excellent communication skills, with a high standard of written English

Bonus points if you have experience with:

  • Virtualisation technologies, especially VMware (vSphere, ESXi)
  • RHEL-based Linux distributions (RHEL, CentOS, Rocky Linux, etc.)
  • Configuration management systems (especially Puppet)
  • Mailserver administration (especially Postfix)
  • Atlassian products (especially Jira)
  • Monitoring tools (especially Nagios/Icinga)

A degree or certification in a relevant area (e.g. CCNA) may be useful, but isn’t essential.

If you think this role could be great for you, please do apply. We’d love to hear from you.

Please note Netcraft does not accept any unsolicited approaches from external recruiters.