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I empower ISPs and Enterprises by resolving complex routing issues, designing high-availability architectures, and eliminating manual overhead through Python and AI-driven automation. Precision, zero downtime, and scalable results.
// Companies & Projects I’ve Supported
I work as an independent consultant delivering high-impact network and infrastructure solutions. Every engagement is focused on one thing: solving your problem fast, with zero guesswork.
Designing scalable, high-availability networks (BGP, OSPF, Datacenter, Azure Cloud) tailored to your specific business needs and growth projections.
Eliminating manual tasks and human error through custom Python scripting and API integrations, saving your engineering team hundreds of hours a month.
Rapid identification and resolution of complex routing and switching bottlenecks in Service Provider and Enterprise environments to ensure stability.
Deploying custom AI tools—such as RAG-based systems for log analysis—to modernize your network operations and accelerate incident resolution.
Every project starts with a free 30-minute technical call. No sales pitch — just an honest assessment of what you need.
I am an Independent Telecommunications Engineer and Consultant with over a decade of experience specializing in Service Provider and Datacenter networking. My technical core lies in IOS-XR (Cisco 8000, NCS5500), BGP, OSPF, Segment Routing, EVPN/VXLAN, and Python automation.
I bring a methodical, investigative approach to network problems — I don’t stop until the root cause is isolated. Whether it is troubleshooting a complex BGP policy anomaly or diagnosing a fabric-level hardware fault, I apply the same analytical depth to ensure zero downtime.
Throughout my career, I have led critical infrastructure projects for global industry leaders, including Cisco, Microsoft, NBC Universal, and major telecom operators across the Americas. I hold 3× CCNP (Enterprise, Service Provider, Data Center), alongside CCNA, DevNet Associate, and AWS Technical accreditations.
Available for freelance consulting in network design, IOS-XR troubleshooting, SP/DC architecture, and Python automation. Based in Mexico City, I operate remote-first worldwide. With valid US and Australian visas, I am also fully equipped for international on-site engagements when required.
Real-world engagements. Problem → Solution → Result.
Global Azure datacenter fabric required IOS-XR platform upgrades and 8818 Fabric Card replacements across 7 sites with no tolerance for service interruption.
Designed phased MOP per-site with rollback procedures, pre/post validation scripts in Python, and coordinated execution windows with Microsoft NOC teams.
100% of upgrades completed with zero unplanned downtime across Phoenix, Chicago, Des Moines, San Jose, Campinas, and Querétaro sites.
NBC Universal required a full EVPN/VXLAN migration of their Hollywood datacenter fabric with strict broadcast windows and complex legacy dependencies.
Created detailed MOP documentation for Nexus platform migration, covering pre-migration validation, cutover steps, and full rollback procedures for each segment.
Migration executed on schedule within planned maintenance window with all legacy services verified operational post-cutover.
Manual pre/post upgrade validation across NCS5500 fleet was time-consuming and error-prone, requiring engineers to check hundreds of state parameters per device.
Developed Python automation framework using Netmiko with auto-discovery of OSPF/BGP/ISIS processes, config capture/restore, and device-agnostic JSON config.
40% reduction in upgrade validation time. Consistent, repeatable process across all NCS5504/5508 platforms with full audit trail.
Full badge wallet → credly.com/users/gabrielcastrocabrera
// Blue pins = Microsoft Azure Datacenter deployments · Cyan pins = On-site project locations
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Available for freelance engagements worldwide. Based in Mexico City — remote-first, on-site when needed. Permanent resident of Mexico. Tourist visas: USA & Australia.
Gabriel has been studying, experimenting, and applying AI technologies before ChatGPT became a household name. From early transformer architectures to modern LLMs, his understanding goes beyond surface-level — he grasps the underlying mechanics that make these systems work.
This depth allows him to leverage AI in ways most engineers cannot: not just using tools, but designing systems around them to solve real engineering problems.
Gabriel specializes in advanced prompt engineering — crafting precise, structured prompts that unlock the full potential of AI models for complex engineering tasks:
The combination of 10+ years of deep networking expertise with advanced AI skills creates a truly unique profile — intelligent systems tailored to SP and datacenter environments.