• Design, implement, and maintain backend services in a modern TypeScript/Node.js ecosystem. • Build and evolve event-driven pipelines, task orchestration, and asynchronous workflows. • Own relational data modeling and migrations using PostgreSQL and ORM-based schema management. • Develop robust APIs (REST and WebSocket) with clear versioning and backward-compatibility guarantees. • Implement and enforce security, authentication, and authorization patterns appropriate for regulated environments. • Partner closely with frontend, DevOps, and product stakeholders to translate requirements into durable backend solutions. • Establish and uphold engineering standards around testing (unit, integration, BDD), code quality, and documentation. • Diagnose and remediate production issues, including performance bottlenecks, data integrity issues, and deployment failures.