I Rewrote Our Payment Gateway in Rust. Revenue Impact Surprised Me

Cutting 47ms from payment processing didn’t just improve latency — it boosted conversion rates by 12% and added $2.1M in annual revenue I Rewrote Our Payment Gateway in Rust. Revenue Impact Surprised Me Cutting 47ms from payment processing didn’t just improve latency — it boosted conversion rates by 12% and added $2.1M in annual revenue Milliseconds matter in payments — small latency improvements translate directly into measurable revenue gains and customer satisfaction. When our payment gateway started timing out during Black Friday traffic, I thought we had a scaling problem. Turned out, we had a language problem. After six months of wrestling with Node.js memory leaks and unpredictable garbage collection pauses, I made the decision to rewrite our core payment processing engine in Rust. The performance gains were expected. The revenue impact wasn’t. What started as a technical migration to solve stability issues ended up delivering a 12% increase in payment conversion rates and $2.1M