Intermediate Software Engineer developing and maintaining live - service virtual worlds for Big Viking Games. Collaborating on TypeScript and PHP codebases and employing AI - forward workflows.
About the role
- Sr. Linux & OCI Administrator at Mitratech managing production applications on Oracle Cloud Infrastructure, focusing on Oracle Linux administration and operational support.
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
Requirements
- 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
- IaC & Automation: Deep proficiency with Terraform (modules, workspaces, remote state, testing) and Ansible (roles, collections, idempotency, vault).
- Systems Expertise:
- 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).
- Scripting: Proficiency in Bash
- Experience with SFTP and SMTP/mail services
- Deployment Experience: Comfortable with both modern (immutable, pipelines, containers) and older practices (in‑place upgrades, change windows, maintenance runbooks).
- Troubleshooting: Proven ability to diagnose and resolve complex incidents across OS, network, and platform layers.
- Documentation & Communication: Clear written/verbal communication; ability to author design docs, runbooks, and RFCs.
Benefits
- Mitratech is an equal-opportunity employer that values diversity at all levels. All qualified applicants will receive consideration for employment without regard to race, colour, religion, gender, national or ethnic origin, age, sex, sexual orientation, gender identity or expression, marital status, family status, disability, or veteran status. Mitratech will work with applicants requesting accommodation at any stage of the hiring process.
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