F5 Network Engineer

Role Overview As a Senior F5 Engineer, you will lead the architecture, engineering, and migration of complex application delivery solutions. The primary focus of this role is the large-scale migration of legacy Citrix NetScaler environments to F5 BIG-IP (LTM/GTM). You will be responsible for the full lifecycle of the project, from initial data gathering and High-Level Design (HLD) to hands-on implementation and post-migration troubleshooting. Key Responsibilities Design & Architecture: Develop High-Level (HLD) and Low-Level Designs (LLD) for F5 LTM and GTM/DNS infrastructure across multi-site data centers. NetScaler to F5 Migration: Lead the technical conversion of NetScaler configurations (Virtual Servers, Service Groups, Policies) into F5 BIG-IP equivalents (VIPs, Pools, iRules). Traffic Management: Design and implement intelligent traffic steering using F5 GTM (Global Traffic Manager)and complex load balancing logic via LTM (Local Traffic Manager). Programmability: Write, test, and deploy advanced iRules (TCL-based) to handle header manipulation, URI switching, and custom persistence requirements that were previously handled by NetScaler policies. Lifecycle Management: Manage F5 hardware/virtual platforms (Viprion, iSeries, or rSeries) and perform OS upgrades, licensing, and vCMP guest provisioning. Security Integration: Configure SSL offloading, certificate management, and basic security profiles (WAF/ASM integration is a plus). Stakeholder Collaboration: Work with application owners to understand traffic flows and requirements, ensuring zero-downtime migrations through meticulous cutover planning. Technical Skills & Qualifications 1. Core F5 Expertise F5 BIG-IP LTM: Expert knowledge of Profiles (TCP, HTTP, SSL), Persistence (Cookie, Source-IP), Monitors, and SNAT. F5 BIG-IP GTM/DNS: Experience with Wide-IPs, Distributed Cloud/Global Server Load Balancing (GSLB), and iQuery communication. iRules Development: Proficiency in writing custom scripts to solve complex traffic steering challenges. Platform Mastery: Hands-on experience with vCMP (Virtual Clustered Multiprocessing) and high-availability (HA) failover clusters. 2. Migration Specifics NetScaler Proficiency: Strong understanding of Citrix ADC/NetScaler concepts (Content Switching, Responder/Rewrite policies, AppExpert) to effectively map them to F5. Migration Tools: Familiarity with manual conversion methods or automation scripts (Python/Ansible) to expedite configuration porting. 3. Network & Troubleshooting Protocol Depth: Deep understanding of the OSI model, specifically TCP/IP, HTTP/S, DNS, and SSL/TLS. Tools: Expert-level use of Tcpdump, Wireshark, and F5's internal bash and tmsh shells for deep packet analysis. Experience & Education Experience: 6-8 years in Network Engineering, with at least 4+ years dedicated strictly to F5/ADC technologies. Proven Track Record: At least one major migration project (NetScaler to F5 or vice-versa) successfully delivered. Certifications: F5 Certified Technology Specialist (LTM/GTM) or F5 Certified Solution Expert (preferred). Soft Skills Analytical Thinking: Ability to decompose complex legacy NetScaler policies into clean, efficient F5 logic. Communication: Able to explain technical migration risks to non-technical business stakeholders. Project Leadership: Experience leading technical workstreams within a larger infrastructure transformation program.

Created: 2026-03-10