Self-hosting a custom CI/CD platform sounds simple until you hit the real-world operational bottlenecks: freezing the HTTP thread during heavy Docker builds, exposing internal databases, or managing build-time secrets across multi-tenant Webhooks. In this interactive Unconference Roundtable, we examine the production architecture of DeployStack—a fully self-hosted, Docker-orchestrated deployment platform built with Flutter Web, Node.js, Apache Kafka, and Socket.io. Core Architectural Topics We'll Unpack & Debate: 1. Asynchronous Job Offloading (Kafka): Why offloading CPU-intensive container compilation to a Kafka producer/consumer pattern is mandatory to prevent API thread starvation. 2. Real-Time Log Streaming: Pipe stdout/stderr logs from isolated build workers to a Flutter Web terminal via Socket.io channel subscriptions. 3. Zero-Trust Infrastructure & Security Hardening: Mathematically isolating internal infrastructure (MongoDB on 27017, Kafka broker on 9092) to 127.0.0.1 while exposing only reverse-proxied entrypoints. 4. Flutter Web Environment Compilation: Injecting dynamic host parameters at compile time using --dart-define-from-file and serving optimized nginx:alpine static bundles.