Developed automated per-user provisioning for the kolyma-labs/instances repository, focusing on reproducible and secure environment setup for developer workstations. Leveraging NixOS and Home Manager, the work introduced a user-specific configuration import that defines hashed credentials, group memberships, and automated retrieval of SSH authorized keys from a GitHub URL. This approach streamlined onboarding by ensuring that user environments are consistently configured across deployments. The implementation emphasized traceability and maintainability, with all changes tracked in version control. The project demonstrated practical application of Nix, system configuration, and user management skills to enhance both security and operational efficiency for targeted users.