• Contribute hands-on to critical platform services (user and session management, communications systems, etc) • Drive architectural decisions for scalability, performance, reliability, and security in high-throughput , business-critical infrastructure • Establish and maintain architecture standards, patterns, and best practices • Collaborate with other senior engineers to evaluate technical tradeoffs and design decisions • Identify risks and reduce technical debt in legacy systems, re-architecting where necessary • Evaluate and introduce new technologies thoughtfully, partnering with Product and Operations to limit risk and monitor new rollouts • Communicate clearly and effectively, including with non-technical audiences, with a strong sense of ownership • Contribute to on-call rotation and production support for team-owned services