Job Overview
| Particulars | Details |
|---|---|
| Position | Network Security Engineer – L1 / L2 / L3 |
| Company | Codevirus Security |
| Location | Lucknow, Uttar Pradesh, India |
| Job Type | Full-Time |
| Experience | 0 - 1 years |
| Category / Department | IT |
| Application Mode |
🏢 About Codevirus Security
About Codevirus Security
Codevirus Security is a cybersecurity company and training organization established in 2018 and based in Lucknow, Uttar Pradesh.
The company focuses on helping organizations protect their digital infrastructure against evolving cyber threats through cybersecurity solutions, security operations, risk management, and security training. Its services include network security, vulnerability assessment and penetration testing, security audits, digital forensics, IoT security, and Security Operations Center (SOC) services.
Cybersecurity Services
Codevirus Security provides solutions across areas including:
Network Security
Firewall Protection
Security Operations Center (SOC)
Vulnerability Assessment
Penetration Testing
Data Protection & Privacy
Cloud Security
System Security Audits
IT Security Audits
Digital Forensics
IoT Security
Networking Audits
Incident Response
Threat Intelligence
Security Operations
The company's cybersecurity operations approach focuses on:
24/7 security monitoring
Threat detection
Incident response
Security event analysis
Proactive threat detection
Security analytics
Compliance and governance
Protection of digital infrastructure
Company Mission:
The company's mission is to help organizations identify risks, defend critical infrastructure, and respond effectively to cyber threats through practical cybersecurity consulting, managed security services, and continuous risk improvement aligned with business objectives.
Company Vision:
Codevirus Security aims to become a trusted cybersecurity partner for enterprises by enabling secure digital operations through proactive, scalable, and intelligence-driven security solutions.
Codevirus Security
Lucknow, Uttar Pradesh, India
💡 Editor's Note / Preparation Tip
Resume Tips:
Network Security candidates should clearly highlight:
Firewall administration
Firewall troubleshooting
WAF
IPS/IDS
SSL/TLS
DNS Security
Anti-DDoS
NBAD
SOC monitoring
Security incident response
Network troubleshooting
Security event analysis
SIEM tools, if applicable
Network security architecture
Security policy implementation
For L2/L3 candidates, emphasize complex troubleshooting, incident investigations, security architecture, escalations, and enterprise-scale security implementations.
Interview Preparation:
Prepare for questions covering:
Network Security
OSI Model
TCP/IP
TCP vs UDP
Common network protocols
VLANs
Routing
NAT
VPN
Network segmentation
Network security architecture
Firewalls
Stateful vs stateless firewall
Firewall policies
NAT policies
Security zones
Rule ordering
Firewall troubleshooting
High availability
Firewall logging
WAF
What is WAF?
WAF vs Firewall
OWASP Top 10
SQL Injection
Cross-Site Scripting
HTTP security
WAF rule management
False positives
IPS/IDS
IDS vs IPS
Signature-based detection
Anomaly-based detection
IPS policies
Alert investigation
False positives
Security Monitoring
SIEM
Log analysis
Security events
Alert triage
Incident response
Threat detection
Event correlation
DNS & SSL
DNS security
DNS attacks
DNS tunneling
SSL/TLS
Certificates
Certificate validation
TLS handshake
DDoS
DoS vs DDoS
Volumetric attacks
Application-layer attacks
DDoS detection
DDoS mitigation
Professional Tips:
Candidates should be ready to explain:
A complex network security incident they investigated.
How they troubleshoot firewall connectivity issues.
How they investigate suspicious traffic.
How they handle security alerts.
How they distinguish false positives from real threats.
Their experience with WAF and IPS.
How they respond to DDoS attacks.
Their experience with DNS and SSL security.
Their experience with security monitoring or SOC operations.
How they escalate critical incidents.
📝 Job Description
Position Overview
Codevirus Security is expanding its cybersecurity team and is looking for talented Network Security Professionals across three levels:
L1 Network Security Engineer
L2 Network Security Engineer
L3 Network Security Engineer
The selected professionals will contribute to protecting enterprise networks and infrastructure against evolving cyber threats.
The roles involve network security monitoring, firewall administration, security event analysis, threat detection, troubleshooting, and implementation of security controls depending on the engineer's experience level.
Core Technology Areas
Candidates should have knowledge or hands-on experience with:
Firewall Management
Web Application Firewall (WAF)
Intrusion Prevention Systems (IPS)
SSL Security
DNS Security
Anti-DDoS Protection
Network Behavior Anomaly Detection (NBAD)
Security Monitoring
L1 Network Security Engineer
An L1 engineer would typically focus on first-level security monitoring, alert analysis, incident identification, basic troubleshooting, ticket management, and escalation of complex security events.
L2 Network Security Engineer
An L2 engineer would typically handle more advanced security event investigation, firewall and security-device troubleshooting, incident analysis, configuration support, and escalation of complex issues.
L3 Network Security Engineer
An L3 engineer would typically be responsible for advanced troubleshooting, security architecture support, complex incident investigations, optimization of security controls, and resolving escalated enterprise security issues.
Important Note
The original job announcement does not specify separate experience ranges, qualifications, salary, working hours, or detailed responsibilities for L1, L2, and L3. Candidates should confirm the level-specific requirements with the hiring team.
🎯 Key Responsibilities
- ✓ Depending on the assigned L1/L2/L3 level, responsibilities may include:
- ✓ Monitor enterprise network security infrastructure.
- ✓ Analyze security alerts and events.
- ✓ Manage and troubleshoot firewall environments.
- ✓ Support Web Application Firewall (WAF) operations.
- ✓ Monitor and manage Intrusion Prevention Systems.
- ✓ Investigate suspicious network activity.
- ✓ Monitor DNS security events.
- ✓ Support SSL/TLS security configurations.
- ✓ Monitor and respond to DDoS-related threats.
- ✓ Analyze Network Behavior Anomaly Detection alerts.
- ✓ Perform security event investigation.
- ✓ Identify potential security incidents.
- ✓ Troubleshoot network security issues.
- ✓ Escalate complex incidents to higher-level engineers.
- ✓ Maintain security incident documentation.
- ✓ Support security policy implementation.
- ✓ Perform security device configuration and optimization.
- ✓ Participate in incident response activities.
- ✓ Support continuous security monitoring.
- ✓ Collaborate with SOC and cybersecurity teams.
- ✓ Contribute to improving enterprise security posture.
💡 Required Qualifications & Skills
🚀 Career Guidance & Interview Insights
To help you succeed, we've compiled original preparation guides, resume keywords, and growth analytics for this category of role.
Joining as a Network Security Engineer – L1 / L2 / L3 offers a fantastic opportunity to work at the forefront of technological innovation. You will be exposed to modern software development lifecycles, collaborate with cross-functional product teams, and design scalable architectures that directly impact end-users. The continuous learning curve in tech ensures that your programming, debugging, and system engineering skills remain highly marketable and sharp.
The career roadmap in technology is highly rewarding. Typical progression starts as a Junior Software Engineer, moving to Associate Developer and then Senior Software Engineer (3-6 years). From there, professionals choose between an individual contributor track—becoming a Tech Lead, Staff Engineer, and Principal Architect—or a management track, advancing to Engineering Manager, Director of Engineering, and Chief Technology Officer (CTO).
Expected Technical & Behavioral Questions:
- Q1: How do you optimize database query performance?
Answer Tip: Talk about indexing strategies, query execution plan analysis, avoiding N+1 queries, and implementing caching layers (like Redis). - Q2: Explain the differences between Microservices and Monolithic architecture.
Answer Tip: Highlight scaling advantages, loose coupling, independent deployments, network latency considerations, and data consistency challenges in microservices. - Q3: How do you handle merge conflicts in Git?
Answer Tip: Explain checking out the local branch, pulling the latest main branch, running git merge, opening the conflicted files to resolve blocks manually, and committing the resolved merge.
To pass automated ATS (Applicant Tracking System) screening and catch the recruiter's eye, tailor your resume with the following tips:
- Keywords to include: Software Engineering, SDLC, OOP, CI/CD Pipelines, SQL databases, Agile, Unit Testing, Code Review, Cloud Architectures (AWS/Azure).
- Format: Use a clean, single-column resume format. Avoid graphics, text boxes, or tables which can scramble ATS parser outputs.
- Quantify Results: Instead of writing 'wrote code', write 'Developed a caching system that reduced server response times by 35%.'
Estimated compensation for this role type in India is ₹3,50,000 - ₹6,00,000 per annum (Freshers/Entry level). The actual salary package offered depends on factors such as company size, work mode (remote or on-site), individual technical proficiency, and negotiations during final HR rounds.
Highly recommended certifications include: AWS Certified Solutions Architect, Microsoft Certified: Azure Fundamentals, Certified Kubernetes Administrator (CKA), Oracle Certified Professional Java SE, or tech-stack specific achievements (e.g. Meta Front-End Developer certification).
Frequently Asked Questions
1. What positions are Codevirus Security hiring for?
Codevirus Security is hiring L1, L2, and L3 Network Security Engineers.
2. Where is the company located?
Codevirus Security is based in Lucknow, Uttar Pradesh, India.
3. What are the primary skills required?
The key areas include Firewall Management, WAF, IPS, SSL, DNS Security, Anti-DDoS, NBAD, and Security Monitoring.
4. Is firewall experience required?
Firewall Management is one of the preferred skill areas for these positions.
5. What is WAF?
A Web Application Firewall (WAF) helps protect web applications by monitoring and filtering HTTP/HTTPS traffic and blocking malicious application-layer requests.
6. What is NBAD?
Network Behavior Anomaly Detection (NBAD) identifies unusual network activity by analyzing network behavior and traffic patterns.
7. Are there multiple experience levels?
Yes. The company is hiring at L1, L2, and L3 Network Security Engineer levels.
8. Are specific experience requirements provided?
The original announcement does not provide separate experience ranges for L1, L2, or L3. Candidates should confirm level-specific requirements with the hiring team.
9. How can I apply?
Send your updated CV to ankit@codevirussec.in.
10. Is the work mode specified?
The original job advertisement does not specify whether the positions are remote, hybrid, or work-from-office.
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