Senior Linux - Unix Admin

Company : Morgan Mckinley

Job Type : Full Time

London

Number of Applicants

000+

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Job Description - Senior Linux - Unix Admin

Job Title: Senior Unix/Linux & Database Administrator

Job Purpose

We are seeking a hands-on, experienced Senior Administrator specialising in Unix/Linux environments and database management within the financial services sector. This role is critical to the stability, performance, and scalability of a recently implemented core banking platform (live since October).

The successful candidate will be expected to hit the ground running, supporting a complex, high-availability environment spanning 50+ servers and 15-20 databases, while also contributing to ongoing optimisation and platform maturity.

Key Responsibilities

Database & Platform Management

Administer and optimise enterprise databases (including SQL Server and Oracle environments) supporting core financial applications
Manage and support clustered database environments, including Oracle RAC
Ensure high availability, performance tuning, and data integrity across all database platforms

Application & Web Layer Support

Support and manage front-end application environments, with experience inFlexcube or WebLogic
Participate in web environment testing and ongoing platform stabilisation following recent go-live

Infrastructure & Systems Administration

Manage and maintain Linux and Unix-based servers across a large-scale production estate (50+ servers)
Perform system upgrades, patching, and performance tuning across OS and database layers

Cluster & Resiliency Management

Manage cluster software and high-availability configurations across systems
Support disaster recovery planning, testing, and execution

Automation & Continuous Improvement

Automate routine administrative tasks using shell scripting and modern tooling
Work closely with application and infrastructure teams to troubleshoot production issues and improve system performance

Governance & Operations

Ensure compliance with IT security standards and financial regulatory requirements
Align with ITIL processes and formal change management practices
Provide on-call support and contribute to incident response and operational documentation

Experience & Skills Required

Database Expertise:
- 7+ years in DBA roles, including SQL Server and Oracle
- Strong experience with clustering, storage, and performance tuning
- Hands-on experience with Oracle RAC
Systems Expertise:
- 5+ years administering enterprise Linux/Unix environments
Application Layer Experience:
- Experience supporting Flexcube or WebLogic environments
Technical Skills:
- Advanced SQL and procedural database languages
- Strong Unix/Linux shell scripting skills
Environment Experience:
- Proven background supporting core banking systems
- Experience working in complex, multi-server, multi-database environments
Tooling & Processes:
- Familiarity with automation, monitoring, and log analysis tools
- Strong understanding of ITIL and change management frameworks
Soft Skills:
- Strong problem-solving ability with a proactive, hands-on mindset
- Ability to operate independently in a fast-paced, production-critical environment

Additional Context

Recently implemented core banking system (live since October)
Estate includes 50+ servers and 15-20 databases
Significant focus on stabilisation, optimisation, and scalability
Requires a candidate who can quickly take ownership and deliver impact

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Senior Linux - Unix Admin

Job Description - Senior Linux - Unix Admin

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