The impact of onboarding efficiency on developer retention is significant. Research shows that effective onboarding can increase employee retention rates by up to 82% and boost productivity by 60%. Poor onboarding, however, can lead to significant financial losses, with companies losing up to 60% of their workforce within the first year. A well-structured mentorship program directly addresses this challenge, with statistics showing that employees who experience positive onboarding are more likely to remain with a company for three or more years. Implementing strategies like personalized experiences, strong mentorship programs, clear role expectations, secure onboarding practices, and feedback mechanisms can transform engineering onboarding from mere orientation to strategic advantage. Tools like Gitpod can streamline developer onboarding by creating consistent, ready-to-code environments that eliminate common friction points.