Pretoria: Senior Linux Infrastructure & Network Engineer (On Site – Pretoria) (Production Systems & Platform Ownership)

ENVIRONMENT A specialist medical technology company with its own on-prem infrastructure is seeking a very senior, hands-on Linux Infrastructure & Network Engineer to take full ownership of its production environment. This is not a corporate DevOps role and not a ticket driven operations position. This is a founder led, non-corporate business that values practical engineering ability, autonomy and accountability. The environment is Linux first, open source focused, and not Microsoft heavy. You will report directly to the owner and take responsibility for the stability, security and performance of mission critical medical web systems hosted within the company’s own infrastructure. This role requires someone comfortable making decisions, building systems properly and taking end to end responsibility. ROLE OVERVIEW You will design, secure and maintain the company’s Linux based infrastructure and Docker powered application platform. The role blends Linux systems engineering, networking, security and automation. You will work closely with developers and manage client infrastructure environments while ensuring uptime, resilience and performance across the platform. DUTIES Design, build and maintain Linux server infrastructure Own and manage Docker based application environments Automate configuration and deployments using Ansible and Bash Administer and optimise PostgreSQL databases Implement and maintain infrastructure security controls Manage HAProxy load balancing and high availability configurations Configure and maintain Mikrotik networking equipment Support internal and client on prem infrastructure environments Maintain connectivity to JINX and NAPAfrica Collaborate closely with developers on infrastructure design and platform stability REQUIREMENTS Minimum 5 years’ experience in a senior Linux Infrastructure or Network Engineering role Strong Linux and Unix background, Ubuntu essential Strong Bash scripting capability Hands on Ansible and Docker experience Working knowledge of PostgreSQL Strong understanding of Linux security principles Solid on prem networking experience Comfortable working fully in office in Pretoria Strong English communication skills, Afrikaans advantageous Advantageous Experience with ZFS Experience with HAProxy Experience with Mikrotik Exposure to Asterisk Experience in NAC heavy environments Experience in high availability or regulated environments