Senior Linux Platform Engineer: DNS & Automation

Colt Technology Services; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Colt Technology Services is seeking a Senior Infrastructure Engineer to own the design, implementation and lifecycle of Linux-based platforms supporting critical telecommunications services. You will drive automation, establish standards and provide leadership during major incidents.

The role covers DNS, routing control-plane services, authentication, identity management, observability and platform automation. Leadership and collaboration across engineering teams are essential.

Qualifications

• Extensive experience engineering enterprise Linux platforms (RHEL, Ubuntu).
• Deep Linux troubleshooting, lifecycle and platform design skills.
• Strong DNS design, delegation, resolution and governance.
• Solid TCP/IP, IPv4/IPv6, routing concepts (BGP), firewalls and load balancing.
• Knowledge of NTP, PKI, TLS, LDAP and identity management.
• Automation using Ansible, Bash or Python; IaC practices.
• Experience with HA, backup, DR, and continuity solutions.
• Familiarity with ISO 27001/CIS benchmarks and security controls.
• Experience leading complex incidents and RCA for cross-functional teams.
• Excellent communication with technical and non-technical stakeholders.

Responsibilities

• Act as technical authority for Linux platforms and services.
• Lead high/low-level designs for critical infrastructure changes.
• Create reusable engineering patterns and platform standards.
• Lead design reviews, risk assessments and migration planning.
• Mentor engineers and share knowledge across the team.
• Design and improve DNS, routing, auth and directory services.
• Collaborate with Network Engineering, Security, and Architecture teams.
• Define SLIs, health checks, monitoring and capacity metrics.
• Drive upgrades, migrations and platform currency improvements.
• Lead incident troubleshooting and root-cause analysis.

Skills

Linux platforms

DNS

TCP/IP

BGP

NTP

LDAP

Ansible

Python

Automation

High availability

Incident management

Security frameworks

Education

Degree in Computer Science or related

Tools

VMware

KVM

Docker

Podman

SAN/NAS

Azure

Google Cloud Platform

Job description

Colt Technology Services is seeking a Senior Infrastructure Engineer to own the design, implementation and lifecycle of Linux-based platforms supporting critical telecommunications services. You will drive automation, establish standards and provide leadership during major incidents.

The role covers DNS, routing control-plane services, authentication, identity management, observability and platform automation. Leadership and collaboration across engineering teams are essential.