Middle/Senior Backend Engineer

ABOUT US Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game. For more information, visit xsolla.com. ABOUT THE PROJECT Xsolla ID is a strategic core service — the centralized identity provider for the entire Xsolla ecosystem. It is not just a login form; it's a comprehensive IAM platform enabling authentication and authorization across all B2C products, including Xsolla Wallet, Xsolla App, Web Shops, and partner integrations. Tech Stack: Language: Go Databases: CockroachDB Infrastructure: Docker, Kubernetes, Nginx Protocols: OAuth 2.0, OpenID Connect, WebAuthn Architecture: Microservices, High Availability design Key Technical Challenges: Building Web2 & Web3 authentication flows (OTP, passkeys, biometrics, wallet-based login) High availability and scaling for millions of concurrent users SDK development and integration with multiple Xsolla products