Note: The job is a remote job and is open to candidates in USA. Prosum is seeking a Principal Linux Platform Engineer who is passionate about Linux, virtualization, automation, and enterprise infrastructure. This role will be responsible for engineering and operating highly scalable Linux environments that support mission-critical healthcare applications across their enterprise.

Responsibilities

• Administer and maintain large-scale Red Hat Enterprise Linux environment deployed to our High-Performance Compute infrastructure
• Design, deploy, and support KVM-based virtualization platforms
• Build and maintain automation solutions using Ansible, Python, and shell scripting
• Configure and support IBM Spectrum Scale (GPFS) storage environments
• Implement system security, hardening, encryption, and compliance controls
• Manage Linux networking including:
• Bonding
• Bridging
• VLANs
• Macvtap
• Configure and administer Linux storage technologies including:
• LVM
• Dm-crypt
• LUKS2
• Troubleshoot complex operating system, virtualization, networking, and storage issues
• Collaborate with Kubernetes, network, security, and application teams to deliver reliable infrastructure services
• Drive platform modernization through automation and standardization initiatives

Skills

• Bachelor's degree or equivalent experience
• 10+ years of Linux systems administration and engineering experience
• Deep expertise with Red Hat Enterprise Linux
• Strong experience deploying and supporting KVM virtualization environments
• Expert-level knowledge of:
• Linux operating systems
• SELinux
• Linux firewalls
• Package management
• System performance tuning
• Experience with Ansible automation and Infrastructure-as-Code methodologies
• Proficiency in shell scripting and at least one programming language such as Python, Go, Rust, Java, or C
• Strong knowledge of storage, encryption, and Linux filesystem technologies
• Excellent troubleshooting and analytical skills
• Strong verbal and written communication skills
• Experience implementing and supporting enterprise monitoring, logging, and alerting solutions using Grafana, Prometheus, Loki, AlertManager, and Thanos
• Strong experience automating infrastructure deployment, configuration, and operational processes using Ansible, scripting, and Infrastructure-as-Code practices
• Demonstrated security-first mindset with expertise in platform hardening, identity and access management, vulnerability remediation, encryption, and regulatory compliance
• Experience administering Red Hat Identity Manager (IdM), including LDAP, Kerberos, SSSD, certificate management, and enterprise authentication services
• Experience with cross-datacenter, high availability failover, and load balancing (F5 & haproxy) between multiple datacenters and K8s clusters
• Red Hat certifications or equivalent practical experience
• Experience with large-scale KVM virtualization deployments
• Knowledge of Kubernetes and OpenShift environments
• Experience with disaster recovery, resiliency, and high-availability solutions
• Familiarity with distributed storage platforms such as IBM Spectrum Scale (GPFS)
• Experience supporting enterprise-scale Linux environments in regulated industries
• Candidates with experience in any of the following will stand out:
• IBM LinuxONE and IBM Z environments
• S390x Linux architecture
• Logical Partitions (LPARs)
• OSA, FCP, RoCE, and Crypto Express adapters
• HMC administration and DPM mode
• SAN architectures and Brocade zoning

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