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Job Description - Network & Security Engineer
Job Title: Network & Security Engineer
Job Description:
1. Overall design, configure and manage company’s network devices.
2. Responsible for building, maintaining, and optimizing the company's network security system to ensure the secure and stable operation of information systems.
3. Deploy, configure, and manage various security devices such as firewalls, intrusion detection and prevention systems, and vulnerability scanning tools.
4. E2E design, configure and manage VPN, include related security, routing and switching.
5. Monitor network security events, analyze and respond to security incidents promptly, and identify and remediate security vulnerabilities.
6. Participate in developing and improving company security policies, procedures, and emergency response plans.
7. Manage security vulnerabilities, patch management, and security hardening tasks.
8. Conduct security training and awareness programs to enhance overall security awareness.
9. Keep up with the latest network security technologies and threat trends to continuously improve security defenses.

Must have:
1. Bachelor’s degree or above in Computer Science or related fields.
2. Proficient in TCP/IP protocol stack, subnetting, VLAN, VPN, and other basic networking concepts.
3. Understanding of the OSI seven-layer model and the functions of each layer.
4. Configuration and management of routing protocols such as OSPF, BGP, RIP, etc.
5. Switch configuration and management, including VLAN segmentation, Spanning Tree Protocol (STP), and link aggregation.
6. Firewall configuration and management (e.g., Cisco ASA, Juniper).
7. Deployment and maintenance of Intrusion Detection and Prevention Systems (IDS/IPS).
8. VPN technologies and encryption protocols (IPSec, SSL VPN, etc.).
9. Security incident response and log analysis.
10. Vulnerability scanning and patch management.
11. Good communication in English and teamwork abilities.

Good to have:
1. Knowledge of network topology design and optimization.
2. Familiarity with scripting languages such as Python and Shell for automating network device management.
3. Experience with network automation tools like Ansible and Terraform.
4. Understanding of cloud platform network architectures (AWS, Azure, GCP) and their security configurations.
5. Cloud security policies and compliance requirements.
6. Use of cloud security tools and services (e.g., cloud firewalls, cloud-based IDS/IPS).
7. Good communication in Japanese.
8. Relevant certifications preferred, such as CCNA/CCNP, CISSP, CEH, etc.