This full-time AI Interfaces Engineer role supports a Bay Area-based startup specializing in 5G location positioning software, offering remote flexibility. The position focuses on designing and building agent-mediated interfaces for both customer-facing products and internal tooling, bridging the gap between concept and production. Key responsibilities include developing AI chat interfaces, creating product-facing MCP servers to safely expose platform data, and establishing evaluation methodologies for agent performance. The role appeals to engineers who enjoy blending prompt engineering with full-stack development in TypeScript and Python. It offers the opportunity to shape a new AI-native frontend pattern within a collaborative culture founded by Stanford graduates, allowing individuals to take ownership of initiatives from early discovery through deployment.