Job offer: LINUX SYSTEM AND SECURITY ADMINISTRATOR H/F

python linux cissp postgresql programmation bash http scripting rigueur oscp mongodb dns ccna tcp-ip pfsense smtp rhcsa rabbitmq redis mariadb lpic kubernetes experience methode ceph serait d’initiative débrouillardise communiquer

The aim of our network and security system administrator will be to ensure the availability, reliability and security of the infrastructure, networks and applications used by Coffreo.

In addition, he or she will have to maintain the performance, stability and scalability of the company's ecosystem, while optimising costs and complying with standards and good practice.

He or she will have 5 main tasks: 

1 - Infrastructure management: 

• Deploy and maintain a stable, secure and scalable Kubernetes infrastructure.
• Installing, configuring and monitoring physical and virtual servers, operating systems (Linux), network services (DNS, NTP, etc.) and containerisation tools (Kubernetes, Docker).
• Implementing monitoring, alerting and logging tools to quickly detect and resolve infrastructure-related problems.
• Backing up and restoring sensitive and critical data.

2 - Security management : 

• Implementing security policies operationally in line with the company's requirements and current standards and regulations (RGPD, ISO 27001, etc.).
• Configuring and maintaining pfSense firewalls to protect the company against external and internal attacks.
• Configuring and maintaining intrusion prevention systems (IPS) and application firewalls (WAF) to detect and block threats.
• Analyse security logs and events

3 - Network management : 

• Configuring and maintaining local area networks (LANs) and wide area networks (WANs) to ensure stable and rapid connectivity between the company's various departments.
• Configuring and maintaining DNS servers to ensure domain name resolution.
• Configuring and maintaining VPN services to enable remote users to connect securely to the company's infrastructure.

4 - Database management: 

• Configure and maintain clustered databases on MongoDB, MariaDB and PostgreSQL to ensure high availability and optimal performance.
• Monitor database performance, diagnose and resolve latency, congestion or contention problems.
• Configuring and maintaining backup and restore mechanisms to protect data against accidental loss or corruption.

5 - Service management :

• Configuring and maintaining cache services (Redis) to improve application performance.
• Configuring and maintaining RabbitMQ queues to ensure communication between the various infrastructure components.
• Monitoring service performance, diagnosing and resolving bottlenecks or malfunctions.