• Own major backend components of the Messaging platform, including business logic, APIs, data models, and supporting infrastructure. • Design, build, test, and ship high-quality production code using TypeScript and GraphQL. • Architect and implement scalable messaging workflows that handle growing volume, complexity, and new product use cases. • Build and maintain production-level AI/LLM integrations, including message orchestration, prompt execution, response handling, and system observability. • Design and optimize Postgres schemas and queries to support messaging state, auditing, and performance at scale. • Implement modern testing, monitoring, and observability practices to improve reliability, performance, and developer velocity. • Create reusable abstractions and internal tooling that enable faster and safer product development across the Messaging platform.