During August 2025, Tipogi developed and launched an ephemeral testnet capability for the pubky/pubky-core repository, enabling homeservers to be initialized with randomly generated keypairs. This work involved refactoring the homeserver creation flow in Rust to support secure, on-demand keypair generation, and updating the test suite to ensure robust coverage of the new randomization paths. By introducing defensive checks and improving documentation, Tipogi enhanced reliability in CI environments and streamlined the feedback loop for backend testing. The project demonstrated depth in backend development and testing, addressing security modeling for test environments and laying groundwork for more flexible testnet scenarios.