• Own full-stack features end-to-end — from database models and APIs to frontend integration and UX correctness. • Design and extend backend systems that power complex agent orchestration — subagents, skills, knowledge base retrieval, parallel execution, and long-running workflows. • Build and evolve REST APIs that are stable, well-typed, and easy for the frontend and agents to consume. • Integrate and debug LLM-powered workflows — prompts, tools, retrieval, evaluation loops — with a strong focus on reliability and observability. • Ensure frontend and backend systems interoperate cleanly: tight contracts, predictable data flow, and minimal friction. • Improve performance, resilience, and security across the stack as usage and complexity grow. • Use coding agents (Claude Code, Cursor, etc.) as force multipliers to move faster and push quality higher. • Collaborate closely with product and design to turn ambiguous ideas into shipped, production-grade features. • Raise the technical bar through thoughtful code reviews, architectural discussions, and mentorship of junior engineers.