---
title: "Andrew Wiggey (@irexta) | Hashnode"
description: "Technical Team @ iRexta | Decoding High-Performance Bare Metal & GPU Infrastructure for the AI Era. Read the latest articles by Andrew Wiggey on Hashnode."
url: "https://hashnode.com/@irexta"
---

@irexta

# Andrew Wiggey

@irexta · Joined April 2026

Technical Team @ iRexta | Decoding High-Performance Bare Metal & GPU Infrastructure for the AI Era.

### [The Chips Got Faster, The Stack Didn't: Fixing AI Infrastructure Bottlenecks](https://irexta.hashnode.dev/ai-infrastructure-bottlenecks?utm_source=hashnode&utm_medium=feed)

Stop paying the Hypervisor Tax. Discover why cloud latency, missing NVLink topologies, and network congestion starve GPUs, and why true AI scalability demands Dedicated Bare Metal.

10 min read · [irexta.hashnode.dev](https://irexta.hashnode.dev/ai-infrastructure-bottlenecks?utm_source=hashnode&utm_medium=feed)

[Oct 22](https://hashnode.com/posts/ai-infrastructure-bottlenecks/6ad9ec249b94fb66ea0bcc4e)

### [How to Optimize LLMs: RAG vs. Fine-Tuning Implementation](https://irexta.hashnode.dev/rag-vs-fine-tuning-llm?utm_source=hashnode&utm_medium=feed)

A hands-on MLOps guide. Implement Semantic Chunking, configure QLoRA Fine-Tuning, sanitize Prompt Injections, and deploy Hybrid AI natively on iRexta Bare Metal.

9 min read · [irexta.hashnode.dev](https://irexta.hashnode.dev/rag-vs-fine-tuning-llm?utm_source=hashnode&utm_medium=feed)

[Oct 22](https://hashnode.com/posts/rag-vs-fine-tuning-llm/6ad9b5f743a4ff0aed7caa44)

### [Istio Ambient Mesh: Definitive Guide to Ztunnel](https://irexta.hashnode.dev/istio-ambient-mesh-architecture?utm_source=hashnode&utm_medium=feed)

Deep dive into the post-sidecar era. Discover Ztunnel kernel mechanics, HBONE routing, Gateway API integration, and Bare Metal wire-speed.

10 min read · [irexta.hashnode.dev](https://irexta.hashnode.dev/istio-ambient-mesh-architecture?utm_source=hashnode&utm_medium=feed)

[Oct 22](https://hashnode.com/posts/istio-ambient-mesh-architecture/6ad9a7e654a13348b162e77e)

### [Build & Test a Kubernetes Operator with Go and CircleCI](https://irexta.hashnode.dev/kubernetes-operator-go-circleci?utm_source=hashnode&utm_medium=feed)

A hands-on SRE guide. Learn how to scaffold with Kubebuilder, master Server-Side Apply (SSA), automate tests in CircleCI, and maximize IOPS on Bare Metal.

8 min read · [irexta.hashnode.dev](https://irexta.hashnode.dev/kubernetes-operator-go-circleci?utm_source=hashnode&utm_medium=feed)

[Oct 22](https://hashnode.com/posts/kubernetes-operator-go-circleci/6ad9a2caddbaedaadf92409f)

### [Beyond Docker: Building Sub-Millisecond Microservices with WebAssembly (Wasm) on Bare Metal](https://irexta.hashnode.dev/beyond-docker-wasm-microservices-bare-metal?utm_source=hashnode&utm_medium=feed)

Escape the AWS Lambda egress tax and Docker bloat. Deploy WebAssembly (Wasm) microservices on Bare Metal for 10,000x density and zero cold starts.

9 min read · [irexta.hashnode.dev](https://irexta.hashnode.dev/beyond-docker-wasm-microservices-bare-metal?utm_source=hashnode&utm_medium=feed)

[Oct 22](https://hashnode.com/posts/beyond-docker-wasm-microservices-bare-metal/6ad9955867bfaeebdaf7e4e6)