Software Engineer, Model Routing & Inference

<p style="min-height:1.5em">Our mission is to automate coding. The first step in our journey is to build the best tool for professional programmers, using a combination of inventive research, design, and engineering. Our organization is very flat, and our team is small and talent dense. We particularly like people who are truth-seeking, passionate, and creative. We enjoy spirited debate, crazy ideas, and shipping code.</p><h2><strong>About the Role</strong></h2><p style="min-height:1.5em">As a Software Engineer on the <strong>Model Routing &amp; Inference</strong> team at Cursor, you'll build the inference platform that powers every AI interaction in the product. </p><p style="min-height:1.5em">This team owns the full inference path: making Cursor's AI faster, more reliable, and more cost-effective at a scale few teams in the world get to operate at. Every agent session, every tab completion, and every chat message flows through your stack.</p><p style="min-height:1.5em"></p><h3>Example projects include...</h3><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Building and evolving our inference gateway, a single abstraction over every provider's API semantics, so model onboarding becomes a config change.</p></li><li><p style="min-height:1.5em">Designing intelligent cross-provider failover so no single provider outage causes user-visible degradation.</p></li><li><p style="min-height:1.5em">Designing routing backpressure and admission control so traffic spikes don't cascade into providers.</p></li></ul><p style="min-height:1.5em"></p><h2>You may be a fit if</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">You have deep experience building high-throughput, low-latency distributed systems, especially in inference serving, traffic routing, or real-time data pipelines.</p></li><li><p style="min-height:1.5em">You're comfortable reasoning about cost/performance tradeoffs at scale (GPU utilization, provider economics, capacity planning).</p></li><li><p style="min-height:1.5em">You have strong software engineering fundamentals and enjoy shipping production systems that handle millions of requests.</p></li><li><p style="min-height:1.5em">You make good calls in the gray area: weighing reliability, cost, latency, and user experience when there isn't a single "right" answer.</p></li></ul><p style="min-height:1.5em"></p><h2>Applying</h2><p style="min-height:1.5em">If there appears to be a fit, we'll reach to schedule 2-3 short technicals. After, we'll schedule an onsite in our office, where you'll work on a small project, discuss ideas, and meet the team.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em">#LI-DNI</p>