I Built a WebAssembly Runtime in 5 Days Because I Was Tired of Paying for Cloud Run
Summary
This article is a technical case study detailing how a bootstrapped hardware startup built a self-hosted, multi-tenant WebAssembly runtime (Badwater) to replace expensive cloud services. It covers architecture decisions for isolation, sandboxing with bubblewrap, JIT vs precompiled WASM for performance, and the operational challenges of running secure, low-latency workloads on commodity hardware, plus future multi-tenant considerations.