Shape Xsolla's authentication and authorization stack. As Principal Engineer, you will lead the evolution of this and enable developers and players to connect safely and effortlessly across the Xsolla ecosystem. You will architect and lead the design of Xsolla’s next-generation identity platform. Develop high-performance Golang microservices that manage user identity, access tokens, and permission enforcement at global scale. Integrate modern IAM standards and protocols (OAuth2, OIDC, SAML, SCIM) to enhance developer experience and partner integrations. Mentor and coach engineering teams on secure service design, identity best practices, and cross-service communication patterns. Ensure that identity-related features are scalable, compliant, and user-friendly.