POSTED AT 05/08/2025 15:34:43
Network Security
Department
Security Dept
Location
Hanoi
Employment type
Full-time
Work experience
Experienced
End date
Application until 31/12/2026
Security
Overview
Viettel Cyber Security (VCS) is a leading cyber security firm, dedicated to protecting digital infrastructures worldwide while conducting in depth research and analysis for security solutions.
Leveraging 100% in house development, VCS offers a comprehensive range of cutting-edge cyber security solutions, protecting governments, financial institutions, large corporations and SMEs against sophisticated cyber threats in the digital age.
VCS is
internationally recognized for its Champion titles at Pwn2Own 2023 & 2024, consistent Top 5 global rankings, the discovery of400+ zero-day vulnerabilities, and multiple prestigious honors, including
Gold – Best Cyber Security Company in Asia.
Responsibilities
– 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.
Qualifications
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.
- Bachelor's degree or higher in Computer Science, Information Technology, Mathematics-Informatics, or related fields
Benefits & perks
- Competitive annual total income package
- Annual salary review in March
- Bao Viet health and personal accident insurance
- Annual health check-up
- Special support for female employees during maternity leave.
- 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.
- Opportunity to work with diverse domestic and international clients
- Working in a Grade A office – Landmark 72 building 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)
- Sports activities: Swimming, Pickleball, Billiards, Poker, PES, etc.
- Twelve (12) days of annual leave according to Labor Law, three (3) days of company vacation and one (1) traditional holiday on 22/12.
- Personal birthday celebrations: Gifts and birthday cake from the Company
- Gift and 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 receive ½ day off), Viettel Group birthday on June 1st, etc
- Care parents and children of employees on special occasions.
APPLICATION FORM
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In accordance with the provisions of the Law on Protection of Personal Data No. 91/2025/QH15 dated June 26, 2025, by checking the boxes below, the Candidate confirms that they have read, understood, and agree to allow Viettel Cyber Security One Member Limited Liability Company (VCS) to process their personal data for each specific purpose stated below. If the Candidate does not agree, we regret that we cannot process the application. The Candidate may withdraw their consent at any time through Customer Service channels, including the hotline +84 382 360 360 or email [Confidential Information].
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- 1. Executing the full recruitment and onboarding cycle: from screening, background checks, and assessments to contract finalization, talent pool management, and internal reporting.
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