About us Sierra is the leading platform for customer-facing AI agents, working with many of the world's biggest brands — including The GAP, Rocket Mortgage, SoFi, Sutter Health, and SoftBank — to transform how they…
Software Engineer on Sierra’s Horizon team builds production AI agents that learn and improve over long horizons across voice, SMS, email, and other channels. The role involves creating feedback loops, evaluation systems, memory, signals, and decisioning infrastructure, plus designing reusable agent platforms and orchestration systems. Core technologies include Python, TypeScript, Go, React, LLMs,
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