How can we onboard remote developers quickly without sacrificing quality?

Remote onboarding starts before day one. Prepare access, environment setup, architecture diagrams, and a short product overview in a central place. Assign a buddy who checks in frequently during the first weeks and reviews early pull requests quickly. Begin with a few small tasks that are clearly defined but touch important areas of the system, so the new developer learns by doing rather than by reading alone. Capture repeated questions in your documentation, and update it as you go; good onboarding docs are living documents, not one off PDFs.