Network Security

Viettel Cyber SecurityQuận Nam Từ Liêm, Hà Nộiglintszveřejněno 13. 12. 2025

Nutné:DockerCloudSecurity

Operate and monitor infrastructure for Information Security (IS) solutions provided to MASS/SME clients (e.g., WAF, Anti-DDoS). This includes ensuring service stability and security, and handling a full range of infrastructure-related incidents from basic to advanced.
Optimize and upgrade the architectural design of IS solution infrastructure (WAF, Anti-DDoS, etc.) to ensure stability and scalability, meeting the business needs of MASS/SME clients.
Handle DDoS and web attacks, ensuring compliance with client SLAs. This involves analyzing logs and utilizing Anti-DDoS and WAF solutions to defend against attacks.
Participate in IS incident response drills for clients, specifically those related to web and DDoS attacks.
Tune and update rules for IS solutions serving MASS/SME clients (e.g., WAF and Anti-DDoS).
Research technologies and the latest optimization/defense techniques to improve and update solutions.
Continuously update knowledge on new network security and web attack techniques, then develop defense strategies and optimize solutions accordingly.

2.1 Qualifications

Bachelor’s degree or higher in Computer Science, Information Technology, Mathematics-Informatics, or related fields
English proficiency equivalent to TOEIC 650 or higher

2.2 Requirements/Competencies:

3+ years of experience in network or network security.
Knowledge of Linux servers, web servers, and virtualization systems like VMware ESXi, vCenter, or similar.
Knowledge of monitoring tools such as Grafana, TICK, Prometheus, or equivalent.
Basic understanding of Cloud Computing, Docker, and Containers.
Fundamental understanding of common web security risks based on the OWASP Top 10.
In-depth knowledge of DDoS attack types, from Layer 3, Layer 4 to Layer 7. You should regularly research and update new attack techniques to propose solutions that ensure client service availability.
Understand the concepts and methods for analyzing and monitoring network-level alerts and threats.
Strong teamwork skills and ability to work well under pressure.
Good information-gathering skills.
Excellent troubleshooting skills for network and network security issues, including the ability to analyze and handle vulnerabilities in a company’s network system.

Competitive annual total income package
Opportunity to work with diverse domestic and international clients
Annual salary review in March
MIC health and personal accident insurance (coverage up to 600 million VND/year)
Annual health check-up
Awards recognizing performance and timely outstanding contributions
100% sponsorship for in-depth international professional certification based on position (in case of unsuccessful attempt, don’t worry, VCS will support 50% of the exam fee), special bonuses for employees achieving international professional certifications
Continuous investment in the latest and most up-to-date learning materials in the field of Information Security from leading global vendors and institutes
100% of employees are provided with an Udemy eLearning account – learn anytime, anywhere
Free participation in professional knowledge sharing programs and seminars from leading domestic and international speakers 12 days of annual leave according to Labor Law and 3 days of company vacation, traditional holiday on 22/12
Personal birthday celebrations: Gifts and birthday cake from the Company
Participation in company events: Quarterly team building activities, monthly birthday celebrations, Year End Party, vacations, International Women’s Day (March 8th), Vietnamese Women’s Day (October 20th) (female employees recieve ½ day off), Viettel Group birthday on June 1st, etc

Working in a Grade A office – Landmark 72 building (Nam Tu Liem, Ha Noi) with a green space complex and a private area for gym and entertainment (billiards, PES, café, reading, Pingpong)
30-minute relaxation daily with Happy hours (4:00 PM – 4:30 PM)

Skills: Vmware Esxi, English Language, Docker, Linux, Ddos, Vcenter