Ramp engineers are using OpenAI’s Codex with GPT-5.5 to supercharge code reviews, cutting wait times from hours to minutes. The tool provides deep reasoning against the codebase, catching bugs that human reviewers and other AI tools miss. It’s become a mandatory part of their workflow, with engineers actually looking forward to its feedback. Beyond reviews, Ramp is also building an On-Call Assistant agent that handles complex incident management and on-call rotation tasks, leveraging Codex’s reasoning to wrangle concurrency bugs and evolving incident details. The result: faster development, higher code quality, and less burnout for engineers. Why it matters: This shows how AI can move from simple code suggestion to acting as a genuine collaborative partner in the software lifecycle, reducing cognitive load and enabling engineers to focus on higher-level problems.