LINUX System Administrator

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At Numerator, we believe tomorrow’s success starts with today’s market intelligence. We empower the world’s leading brands and retailers with unmatched insights into consumer behavior and the influencers that drive it.

ISEC is an ETL data processing platform that powers Worldpanel by Numerator’s UK, Portugal and Spain data delivery for various research panels measuring consumer shopping behaviour. The largest panel in the UK has been running for 30 years and provides industry benchmark data through the continuous collection of shopping trips with each of the 30,000 households that are on the panel scanning barcodes on all products purchased in each trip

Background

We are seeking a proactive and experienced Linux & Oracle DBA to take ownership of our application and database infrastructure across both Production and Non-Production environments.

Working closely with the Application Infrastructure Manager, this role will be responsible for the design, administration, optimisation, and continuous improvement of the Linux and Oracle database platforms.

The successful candidate will play a key role in shaping the technical direction, driving performance and reliability, and delivering scalable solutions that support business growth.

Role description

The Linux Sys Admin will be responsible for reviewing and assessing the existing tech stack and take ownership alongside the Application Infrastructure Manager of the ongoing design, support and administration of both the application and Databases stacks across Production and Non-Production environments.

The person will report to the Application Infrastructure Manager within the Technology pillar whilst also partnering with the wider technology team in terms of strategical direction – this person will be proactive, willing to take the initiative and suggest solutions and approaches that will make a real tangible difference to the platform, the team that support it and the wider business as a whole.

Responsibilities

• Own the administration, support, and optimisation of Linux servers and Oracle database environments.

• Manage Oracle databases including installation, configuration, patching, backup, recovery, and performance tuning.

• Work with the Application Infrastructure Manager to define an effective infrastructure support and maintenance strategy.

• Support and enhance both Production and Non-Production environments ensuring high availability and resilience, including Out Of Hours support where necessary.

• Monitor system and database performance, proactively identifying and resolving issues.

• Design and implement monitoring, alerting, and reporting solutions with meaningful operational metrics.

• Develop automation tools to help teams make the most out of the available infrastructure.

• Support high availability and disaster recovery solutions (e.g., RMAN, Data Guard, clustering, load balancing)

• Maintain comprehensive technical documentation and operational procedures

Experience

• Typically 6+ years in Linux system administration and Oracle DBA roles.

• Experience working in enterprise or complex technology environments.

Requirements

• Strong experience administering Linux systems (e.g., Red Hat, Oracle Linux, CentOS) in virtualised or cloud environments.

• Proven hands-on experience as an Oracle DBA (11g/12c/19c or later)

• Expertise in Oracle backup/recovery, performance tuning, and database optimisation

• Strong scripting skills (Bash or similar) for automation and system management

• Solid understanding of networking, security, and system architecture principles

• Experience supporting production-critical systems with high availability requirements

• Knowledge of infrastructure monitoring, logging, and alerting tools

• Experience configuring and managing services including load balancing and clustering.

• Experience of working in complex, cross-boundary environments

• Excellent experience of working in partnership at all levels of an organisation.

• A broad understanding of Technology (including but not limited to Applications, Development, Testing)

Desirable Skills

• Experience with Oracle RAC and ASM

• Exposure to cloud platforms (OCI, AWS, or Azure)

• Familiarity with Infrastructure as Code and automation tools (e.g., Ansible, Terraform)

• Experience with enterprise monitoring tools (e.g., Oracle Enterprise Manager, Nagios, Prometheus)

• Understanding of CI/CD pipelines and DevOps practices

Soft Skills & Competencies

• Strong problem-solving and analytical thinking

• Ability to work independently and exercise sound technical judgement

• Proactive mindset with a focus on continuous improvement

• Excellent communication skills, including with non-technical stakeholders

• Proven ability to collaborate across teams and influence at all levels

• Comfortable working in fast-paced, complex, and cross-functional environments