I Sniped a Solana Token in 400ms — Here's the Full Tech Stack When Solana's latest meme token dropped last week, I executed a snipe transaction in just 400 milliseconds. Here's the exact technical breakdown of how I built this MEV (Maximal Extractable Value) sniper bot using Jito bundles, Jupiter routing, and Helius RPC—with real code and hard-won lessons. The Problem: Solana’s Speed Requires Extreme Optimization Solana’s 400ms block times mean traditional Ethereum MEV strategies won’t work. You need: Sub-100ms RPC latency (Helius) Pre-emptive transaction bundling (Jito) Optimal swap routing (Jupiter) Pre-signed transactions to bypass wallet confirmation delays The Stack: From Detection to Execution 1. Token Detection (50ms) I used a custom websocket listener on Solana’s programSubscribe to catch new token mints in real-time: const connection = new Connection ( HELIUS_RPC_URL , " confirmed " ); connection .…