[Hiring] Sr. Linux & OCI Administrator @Mitratech

Role Description

We are seeking an experienced Sr. Linux & Oracle Cloud Infrastructure (OCI) Administrator to support a production application hosted on OCI. The role focuses on Oracle Linux administration, OCI networking and security, Terraform-based automation, and operational support for SFTP and mail services.

Essential Duties & Responsibilities:

• Administer and support Oracle Linux systems (patching, tuning, troubleshooting)
• Manage OCI resources: compute, VCNs, subnets, routing, load balancers
• Configure and maintain OCI security (IAM, NSGs, security lists, compartments)
• Design and troubleshoot OCI networking and connectivity issues
• Provision and manage infrastructure using Terraform (IaC)
• Support SFTP and mail services (secure access, monitoring, troubleshooting)
• Perform system monitoring, backup coordination, and DR support
• Participate in production support, incidents, and on-call rotations
• Maintain operational documentation and runbooks

Qualifications

• 7+ years professional experience administering Linux in production (preferably Oracle Linux or closely related RHEL)
• Strong hands-on experience with OCI administration (compute, networking, IAM, security)
• Experience supporting Oracle WebLogic Server
• Working knowledge of Oracle Database environments
• Deep proficiency with Terraform (modules, workspaces, remote state, testing) and Ansible (roles, collections, idempotency, vault)
• Kernel, systemd, SELinux/AppArmor, LVM/filesystems (xfs/ext4/btrfs), iSCSI/NFS, SSH/hardening
• Package and patch management (yum/dnf, repo mirrors, Ksplice), vulnerability management, and baseline hardening (CIS/STIG)
• Solid understanding of Networking Fundamentals: TCP/IP, routing, DNS, DHCP, load balancing, proxies, firewalls/security groups, PKI/certificates (TLS)
• Proficiency in Bash
• Experience with SFTP and SMTP/mail services
• Comfortable with both modern (immutable, pipelines, containers) and older practices (in-place upgrades, change windows, maintenance runbooks)
• Proven ability to diagnose and resolve complex incidents across OS, network, and platform layers
• Clear written/verbal communication; ability to author design docs, runbooks, and RFCs

Requirements

• OCI certifications
• Experience with monitoring tools and CI/CD pipelines
• High availability and disaster recovery experience

Benefits

• Health, Dental & Vision Insurance
• 401 (k) + Employer Match
• Unlimited PTO + 11 Paid Holidays + 4 Annual Paid Global Wellness Days Off
• STD, LTD & Group Life Insurance
• Paid Parental Leave
• Pet Insurance
• FSA & HSA Options
• Employee Assistance Program