Worked on the gravitational/teleport repository to deliver a new GitHub Join Tokens API, focusing on improving token lifecycle management for enterprise workflows. Used Go and TypeScript to implement API changes that return GitHub-specific configuration and support token parsing, ensuring join-method tokens do not expire to accommodate long-running use cases. Enhanced test coverage to include enterprise token types and existing GitHub token scenarios, increasing reliability and preventing regressions. Performed targeted backend refactoring by refining tokenId handling and removing redundant header checks, which streamlined validation and reduced potential misconfigurations. Emphasized API consistency, security, and developer experience throughout the development process.