Senior/Expert in Cluster/HA Management

EarthStream Global; United Kingdom; On-site; GBP 100,000 - 125,000; Part time

Job summary

A leading technology solutions provider is seeking a Senior/Expert HA/Clustering Engineer for a short-term contract in the UK. The role involves designing and supporting high availability PostgreSQL clusters using Pacemaker on RHEL9/Linux. The ideal candidate will have extensive experience with clustering and replication, strong problem-solving skills, and be available for immediate start. Competitive daily rates are offered.

Benefits

Competitive daily rate

Immediate engagement on a high-impact project

Opportunity to shape HA design

Qualifications

• Deep expertise in RHEL9/Linux environments.
• Proven track record in PostgreSQL HA & replication.
• Strong hands-on experience with Pacemaker clustering.

Responsibilities

• Design, configure, and support high availability clustering.
• Manage hot standby promotion and asynchronous WAL replication.
• Implement fencing in VM-based environments.

Skills

RHEL9/Linux expertise

PostgreSQL HA & replication

Pacemaker clustering

Fencing mechanisms

RabbitMQ HA queues

Problem-solving skills

Job description

Overview

Senior/Expert HA/Clustering Engineer (PostgreSQL + Pacemaker) Contract: 2 weeks (likely extension)
Location: Onsite (details on request)

Start: Immediate

We are seeking an experienced HA/Clustering Engineer to support the implementation of a high availability PostgreSQL cluster using Pacemaker on RHEL9/Linux environments. This is a short-term contract opportunity for a senior specialist who can provide hands-on expertise and guide project delivery.

Key Responsibilities

• Design, configure, and support high availability clustering with Pacemaker and PostgreSQL.
• Manage hot standby promotion using OCF and asynchronous WAL replication to multiple replicas.
• Implement fencing (IPMI/virsh) in VM-based (non-container) environments.
• Configure and support RabbitMQ with HA queues (or similar message queue systems).
• Troubleshoot, optimise, and ensure reliable failover and recovery processes.

Key Skills & Experience

• Deep expertise in RHEL9/Linux environments.
• Proven track record in PostgreSQL HA & replication.
• Strong hands-on experience with Pacemaker clustering and resource management.
• Knowledge of fencing mechanisms (IPMI/virsh).
• Familiarity with RabbitMQ HA queues or equivalent.
• Strong problem-solving and troubleshooting skills.
• Available for immediate start.

What We Offer

• Competitive daily rate.
• Immediate engagement on a high-impact project.
• Opportunity to shape HA design and provide technical leadership.

If you are available and have the expertise required, please apply today with your CV and availability details.