Overseas Contractor

Senior Linux Administrator with Blockchain

Mandatory Skills :CentOS Linux Administrator, RedHat Linux Administrator, Ubuntu Linux Administrator

Mode-Hybrid

Experience 810 Years

Role Summary

We are looking for an experienced Senior Linux Administrator to manage secure and optimize enterprise Linux infrastructure supporting businesscritical applications The role requires strong handson expertise in Linux administration patching security performance management troubleshooting and production support within a 24x7 environment

Key Responsibilities

Administer maintain and support Linux servers across production and nonproduction environments

Perform OS installation configuration upgrades kernel updates patching and lifecycle management

Troubleshoot complex OS applicationhosting performance network filesystem and servicerelated issues

Monitor and optimize CPU memory disk filesystem network and IO performance

Manage user accounts groups permissions sudo access services packages repositories and scheduled jobs

Manage filesystems LVM mounts disk allocation and storage utilization

Implement Linux security hardening and remediate vulnerabilities and compliance findings

Plan and execute patching activities including readiness checks postpatch validation and rollback support

Automate routine administration patching monitoring compliance and serverprovisioning activities

Support backup restore disaster recovery high availability and infrastructure maintenance activities

Coordinate with application database network storage security and virtualization teams

Handle incidents service requests problems and changes in line with ITIL processes

Perform root cause analysis and implement preventive and continuous improvement actions

Maintain technical documentation operating procedures knowledge articles and infrastructure inventories

Participate in oncall support and manage critical production incidents within agreed SLAs

Technical Skills

810 years of handson Linux system administration experience in enterprise environments

Strong knowledge of Red Hat Enterprise Linux Ubuntu or equivalent distributions

Strong understanding of Linux architecture kernel boot process system services and package management

Experience with OS patching upgrades security hardening and vulnerability remediation

Proficiency in Bash or Shell scripting

Experience with Ansible Puppet or similar configurationmanagement tools

Knowledge of Red Hat Satellite or equivalent patch and lifecyclemanagement platforms

Strong experience with user administration access controls sudo configuration and filesystem management

Working knowledge of LVM DNS NTP SSH TCPIP system logging and Linux network configuration

Experience in capacity management and performance troubleshooting across CPU memory disk network and IO

Understanding of enterprise monitoring backup storage high availability and disasterrecovery concepts

Experience working with incident problem change and servicerequest management processes

Ability to support businesscritical systems within a 24x7 production environment

Strong troubleshooting documentation communication and stakeholdermanagement skills

GoodtoHave Skills

Blockchain Solutions

Exposure to infrastructure supporting enterprise blockchain or distributedledger platforms

Familiarity with Hyperledger Fabric Ethereum R3 Corda Quorum or similar technologies

Understanding of blockchain nodes peers certificates wallets consensus mechanisms and ordering services

Experience with blockchain platform deployment monitoring patching backup recovery and security

Automation

Advanced experience with Ansible Puppet Terraform Python or similar automation technologies

Experience automating server builds patching compliance checks health checks and operational workflows

Familiarity with infrastructure as code Gitbased version control and CICD pipelines

Additional Preferred Skills

DB Postgres v13 and later

Message Broker WMQActiveMQ

Apache

ProxySquid

DNSBind

FTPSFTP