Senior Network Engineer

Senior Network Engineer – Load Balancer Specialist NetScaler and F5

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 (Ansible, Terraform, AS3, F5 DO/FAST). - Cloud load balancing (Azure Traffic Manager, AWS ALB/NLB/ELB, GCP LB). 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 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.