Senior Network Engineer – Load Balancer Specialist NetScaler and F5

Infosys; Chennai District; On-site; INR 1,500,000 - 2,500,000; Full time

Job summary

A leading IT solutions provider is seeking an experienced professional to manage load balancing technologies, primarily F5 BIG-IP and NetScaler ADC, in Tamil Nadu. The role requires over 8 years of hands-on experience, strong troubleshooting skills, and knowledge of traffic management. Certifications like F5 CTS and CCNP are preferred. Responsibilities include installation, configuration, and optimization of load balancers, ensuring compliance, and collaborating on application delivery support. The ideal candidate thrives in high-pressure environments.

Qualifications

• 8+ years hands-on experience in load balancing technologies.
• Strong knowledge of application delivery and traffic management.
• Experience with automation tools for deployment.

Responsibilities

• Deploy, configure, and upgrade F5 BIG-IP modules.
• Perform daily health checks and optimize traffic flows.
• Maintain security on ADC/F5 and enforce compliance.

Skills

Load Balancers (F5 BIG-IP & NetScaler ADC)

L4-L7 Traffic Management

L2/L3 Networking

Troubleshooting

Scripting (Python, Bash, PowerShell)

Automation Tools (Ansible, Terraform)

Education

Relevant IT Certifications (F5 CTS/CA, Citrix CCA-N/CCP-N)

CCNP/CCIE (Routing & Switching or Enterprise)

ITIL Foundation

Tools

F5 BIG-IP modules

NetScaler ADC

SSL Offload

Job description

Required Skills

• 8+ years hands‑on experience in load balancers (F5 BIG‑IP & NetScaler ADC).
• Strong knowledge of L4–L7 traffic management, SSL, TCP profiles, and application delivery.
• Solid L2/L3 networking: switching, routing, OSPF, BGP, VLANs, trunks.
• Experience with HA, clustering, GSLB, WAF, and ADC security.
• Strong troubleshooting via packet captures, logs, and CLI tools.

Preferred Skills

• Scripting knowledge (Python, Bash, PowerShell).
• Experience with automation tools (Ansible, Terraform, AS3, F5 DO/FAST).
• Cloud load balancing (Azure Traffic Manager, AWS ALB/NLB/ELB, GCP LB).

Responsibilities

1. Load Balancer Installation & Configuration:
   • Deploy, configure, and upgrade F5 BIG‑IP modules (LTM, GTM/DNS, ASM, APM).
   • Configure NetScaler ADC (Gateway, Load Balancing, Content Switching, GSLB).
   • Build VIPs, pools, health monitors, SSL offload, and traffic steering policies.
2. Load Balancer Administration & Optimization:
   • Perform daily health checks, certificate renewals, SSL/TLS hardening, and cipher suite updates.
   • Optimize traffic flows, persistence profiles, connection limits, and HTTP/HTTPS tuning.
   • Maintain iRules, traffic policies, responder policies, rewrite/redirect logic.
3. High Availability & Global Traffic Management:
   • Configure HA pairs, sync‑failover groups, clustering, and device service clustering.
   • Implement global load balancing (GSLB) and DNS traffic distribution.
   • Validate failover, redundancy, and DR routing resilience.
4. Switching & Routing (Core Networking):
   • Configure Layer 2/3 technologies: VLANs, STP, VTP, EtherChannel, OSPF, BGP, EIGRP.
   • Troubleshoot routing loops, broadcast storms, flapping ports, and uplink issues.
   • Support WAN routing, MPLS, SD‑WAN, and QoS.
5. Security & Compliance:
   • Enforce security on ADC/F5: WAF policies, DoS protection, bot mitigation.
   • Implement ACLs, segmentation, secure access, and encryption standards.
   • Support audits, compliance checks, and secure configuration baselines.
6. Troubleshooting & RCA:
   • Diagnose issues across the application delivery stack (L2–L7).
   • Troubleshoot certificates, health monitors, connection resets, latency, and failover events.
   • Analyze logs, tcpdumps, performance graphs, and system alerts.
7. Integration & Application Delivery Support:
   • Work with application teams to onboard services using blueprints and templates.
   • Configure load balancing for web, app, API, microservices, and on‑prem/cloud workloads.
   • Support hybrid integration with Azure/AWS/GCP load balancers.
8. Monitoring & Operations:
   • Configure alerts, dashboards, and analytics using F5 iHealth, NetScaler MAS, SNMP, Syslog.
   • Maintain device backups, version control, and configuration archives.
9. Decommissioning & Lifecycle Management:
   • Decommission legacy VIPs, devices, or clusters.
   • Clean up unused certificates, objects, and routing entries.
   • Update CMDB, network diagrams, and documentation.
10. 3rd‑Party & Vendor Coordination:
    • Engage with F5/Citrix TAC, network carriers, ISP providers, and OEMs.
    • Track support tickets, implement fixes, and validate patches.

Certifications (Preferred)

• F5 CTS/CA, Citrix CCA‑N/CCP‑N.
• CCNP/CCIE (Routing & Switching or Enterprise).
• ITIL Foundation.

Behavioral Competencies

• Analytical, detail‑oriented, and proactive.
• Strong communication and documentation discipline.
• Ability to work in high‑pressure environments.

Shift Requirements

• Business hours with on‑call rotation.
• Availability for maintenance windows and change deployments.

Location: CHN and BLR