Senior / Staff+ Software Engineer, Voice Platform

<div class="content-intro"><h2><strong>About Anthropic</strong></h2> <p>Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems.</p></div><h2 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">About the role</h2> <p class="font-claude-response-body break-words whitespace-normal leading-[1.7]">We're building the infrastructure that lets people <em>talk</em> to Claude—real-time, bidirectional voice conversations that feel natural, responsive, and safe. This is foundational work for how millions of people will interact with AI.</p> <p class="font-claude-response-body break-words whitespace-normal leading-[1.7]">The Voice Platform team designs and operates the serving systems, streaming pipelines, and APIs that bring Anthropic's audio models from research into production across Claude.ai, our mobile apps, and the Anthropic API. You'll work at the intersection of real-time media, low-latency inference, and distributed systems—building infrastructure where every millisecond of latency is felt by the user.</p> <p class="font-claude-response-body break-words whitespace-normal leading-[1.7]">We partner closely with the Audio research team, who train the speech understanding and generation models, and with product teams shipping voice experiences to users. Your job is to make those models fast, reliable, and delightful to talk to at scale.</p> <h2 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">What you'll do</h2> <ul class="[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)ul]:pb-1 [&amp;:not(:last-child)ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3"> <li class="whitespace-normal break-words pl-2">Design and build the real-time streaming infrastructure that powers voice conversations with Claude—ingesting microphone audio, orchestrating model inference, and streaming synthesized speech back with minimal latency</li> <li class="whitespace-normal break-words pl-2">Build low-latency serving systems for speech models, optimizing time-to-first-audio and end-to-end conversational responsiveness</li> <li class="whitespace-normal break-words pl-2">Develop the public and internal APIs that expose voice capabilities to Claude.ai, mobile clients, and third-party developers</li> <li class="whitespace-normal break-words pl-2">Own the audio transport layer—codecs, jitter buffers, adaptive bitrate, packet loss recovery—so conversations stay smooth across unreliable networks</li> <li class="whitespace-normal break-words pl-2">Build observability and quality-measurement systems for voice: latency distributions, audio quality metrics, interruption handling, and turn-taking accuracy</li> <li class="whitespace-normal break-words pl-2">Partner with Audio research to move new model architectures from experiment to production, and feed real-world performance data back into research</li> <li class="whitespace-normal break-words pl-2">Collaborate with mobile and product engineering on client-side audio capture, playback, and the end-to-end user experience</li> </ul> <h2 class="text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold">You may be a good fit if you</h2> <ul class="[li&amp;]:mb-0 [li&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3"> <li class="whitespace-normal break-words pl-2">Have 6+ years of experience building distributed systems, real-time infrastructure, or platform services at scale</li> <li class="whitespace-normal break-words pl-2">Have shipped production systems where latency is measured in tens of milliseconds and users notice when you miss</li> <li class="whitespace-normal break-words pl-2">Are comfortable working across the stack—from transport protocols and serving infrastructure up to the APIs product teams build on</li> <li class="whitespace-normal break-words pl-2">Are results-oriented, with a bias toward flexibility and impact</li> <li class="whitespace-normal break-words pl-2">Pick up slack, even if it goes outside your job description</li> <li class="whitespace-normal break-words pl-2">Enjoy pair programming (we love to pair!)</li> <li class="