No QA team. No on-call rotation. One person, one binary, one financial product. The compiler is my entire engineering org.

Trevor Lasn

A solo developer explains why they chose Rust to power 0xInsider, a real-time financial intelligence terminal for prediction markets. With no QA team or on-call rotation, they rely on Rust's compile-time guarantees to catch concurrency bugs, SQL schema mismatches, and unhandled API response shapes before they reach production. The post covers specific architectural patterns: 190+ SQL queries verified at compile time via SQLx, priority scheduling with Tokio's biased select, bounded mpsc channels for WebSocket backpressure, deterministic resource cleanup via Drop, separate typed database pools to prevent cross-contamination, and a 30% memory reduction from swapping in jemalloc. The entire system ships as a single binary. Tradeoffs acknowledged include steep learning curve, borrow checker friction, and slow compile times.

Why I Chose Rust for 0xInsider

The fast lane: priority scheduling with biased select