Senior Network Engineer - Application Delivery & Security
Pittsburgh, PA, U.S.A Hybrid
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About the role
The Network Engineering team at Teraswitch designs and operates our low-latency global backbone and the network services layered on top of it. This role leads the rollout and ongoing operation of our F5 application delivery and security platform across 25+ points of presence — global server load balancing, L4–L7 application delivery and SSL/TLS termination, WAF, and DDoS mitigation — for a multi-tenant, service-provider environment. You'll own the F5 fleet end to end: architecture and standardization, device onboarding and provisioning at scale, day-to-day operations, and automation. This role reports to the Principal Network Architect. Title and level will be calibrated to your experience, technical depth, and demonstrated scope of ownership.
What you'll bring
- Deep, hands-on experience designing and operating F5 BIG-IP in production, including LTM (L4–L7 load balancing and SSL/TLS termination) and iRules
- Strong applied networking fundamentals across the L2–L7 path — TCP/IP, DNS, HTTP/HTTPS, and TLS
- Working knowledge of BGP and dynamic routing, and how they integrate with application delivery (e.g., route health injection, anycast)
- F5 automation experience (iControl REST and/or declarative config via AS3 and Declarative Onboarding)
- Configuration management (Ansible) and/or scripting experience (Python, bash)
- Comfortable working in a fast-paced, results-oriented environment
- Committed to operational best practices and security by design
- A balance of AI-assisted development and actual understanding of the technologies in use.
- You do not need all of these — depth in a few areas plus strong fundamentals is sufficient:
- F5 experience in a service or hosting provider environment specifically — multi-tenant design, automation-first operations, and scalable, secure delivery (as distinct from single-tenant enterprise)
- Global server load balancing at scale with BIG-IP DNS / GTM
- WAF policy design and tuning, including bot defense, with F5 Advanced WAF / ASM