New Developer Onboarding: How Metrics Show the Ramp-Up to Full Productivity

You've just hired a senior developer. They start Monday. When will they be fully productive? HR says "30 days." The hiring manager says "a few weeks." The developer themselves says "give me the codebase and I'll be fine." Reality is different. Coding activity data tells a more honest story about what new developer ramp-up actually looks like — and it's longer than most organizations plan for. The Uncomfortable Truth About Ramp-Up Most companies treat onboarding as a one-week event: laptop setup,