PERN Linux Systems Engineer

Position PERN Linux Systems Engineer Location Madison, WI-hybrid Duration 1 years Interview Method MS Teams (1-2 Rounds)

LinkedIn Id & Government exp must have

NOTE: Candidate MUST be CURRENT WI resident. NO RELOCATION ALLOWED. All work must be done within the State of Wisconsin. 100% remote work is an option. Can accommodate if candidate wants to work onsite

Description

Our client is looking for a PERN Linux System Engineer to manage, maintain, and optimize our on-premise commercial software applications built on PostgreSQL, Express.js, React, and Node.js. The ideal candidate will be responsible for deploying, monitoring, securing, and scaling the PERN stack infrastructure within a Linux-based virtualized environment. This role requires expertise in database administration, Linux system management, scripting/automation, and security best practices. This role also includes app administration, installation, deployments, configurations, versioning, app patching, performance monitoring and optimizations.

Tasks

Platform Administration & Maintenance

• Manage and optimize PostgreSQL databases, including backups, replication, indexing, and query performance tuning.
• Deploy, configure, and maintain Express.js, React, and Node.js applications on Linux virtual machines. This includes NGINX and PM2 platforms.
• Oversee on-premises system infrastructure, ensuring high availability and performance.
• Implement and maintain CI/CD pipelines for automated deployments.
• Troubleshoot and resolve system, application, and network issues.
  
  

Security & Operations

• Review system hardening, data encryption, and access control policies align with security best practices.
• Work with other teams to monitor vulnerabilities and apply security patches and updates.
• Assist in defining firewall rules, intrusion detection, and role-based access control (RBAC).
• Review compliance with data governance and regulatory requirements.
• Ensure proper backup, disaster recovery, and redundant configurations.
  
  

Support & Documentation

• Provide technical support for platform-related issues and troubleshooting.
• Maintain clear documentation for deployments, configurations, and troubleshooting guides.
• Train and support developers and IT staff on best practices and operational procedures.
  
  

Skills Required

• 5-7 years - Strong expertise in PostgreSQL administration, including replication, backup strategies, and performance tuning.
• 5-7 years - Experience deploying PERN stack (Postgre SQL, Express, React, Node.js) applications in a cloud or on-premises environment.
• 5-7 years - Knowledge of CI/CD tools like GitHub actions, Azure Devops pipelines, or Ansible for automation.
• 5-7 years - Scripting and automation experience with Bash, Python or similar scripting.
• Prior experience in IT infrastructure, DevSecOps, or SRE roles.
• Proficiency in Linux app and database server administration, with experience such as Ubuntu or RHEL.
• Understanding of network security, firewalls, VPNs, and SSH hardening.
• Knowledge of OpenID Connect (OIDC) or LDAP as well as IAM tools such as Entra ID, Okta, Active Directory, or centralized authentication mechanisms.
• Familiarity with virtualization platforms (VMware or Hyper-V).