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  <jobs>
    <job>
      <externalid>c76014f6-557</externalid>
      <Title>Senior Software Engineer, Backend (AI Agent Runtime)</Title>
      <Description><![CDATA[<p>Build real-time AI agent infrastructure: Design and operate the stateful, low-latency runtime that powers voice and chat AI agents , from LLM streaming and conversation state management to graceful recovery and multi-channel support.</p>
<p>Solve distributed systems problems: Own session management across scaled-out workers , including affinity, checkpointing, crash recovery, and consistency under concurrent access.</p>
<p>Build a function execution platform: Own a serverless-style runtime where customers deploy custom logic , build orchestration, container lifecycle, autoscaling, and versioned rollouts.</p>
<p>Own developer experience and test infrastructure: Build CLI tools, local development environments, and test execution frameworks that let engineers iterate quickly and ship with confidence.</p>
<p>Raise the bar on production quality: Drive observability, incident response, and engineering best practices across the team.</p>
<p>We&#39;re looking for a senior software engineer with 5+ years of experience in infrastructure, platform, or systems work. You should have strong Python and Go skills, as well as a deep understanding of distributed systems, consistency, fault tolerance, state management, and concurrency.</p>
<p>Experience with Kubernetes and cloud-native infrastructure is also required. You should be able to build developer-facing tooling, such as CLIs, SDKs, local dev environments, or internal platforms.</p>
<p>A high bar for code quality, thorough testing, thoughtful code review, and sustainable engineering practices are essential. You should be comfortable operating what you build, on-call, incident response, and production ownership.</p>
<p>AI-native workflow is a must, and you should actively use LLMs and AI-assisted tools in your daily development.</p>
<p style="margin-top:24px;font-size:13px;color:#666;">XML job scraping automation by <a href="https://yubhub.co">YubHub</a></p>]]></Description>
      <Jobtype>full-time</Jobtype>
      <Experiencelevel>senior</Experiencelevel>
      <Workarrangement>remote</Workarrangement>
      <Salaryrange></Salaryrange>
      <Skills>Python, Go, Distributed systems, Kubernetes, Cloud-native infrastructure, Developer-facing tooling, Code quality, Testing, Code review, Sustainable engineering practices, LLMs, AI-assisted tools, Real-time voice or streaming media systems, Hands-on with LLM integration, Serverless or function-as-a-service platforms, Workflow engines, Infrastructure-as-code and GitOps workflows</Skills>
      <Category>Engineering</Category>
      <Industry>Technology</Industry>
      <Employername>Cresta</Employername>
      <Employerlogo>https://logos.yubhub.co/cresta.ai.png</Employerlogo>
      <Employerdescription>Cresta is a company that combines AI and human intelligence to help contact centers discover customer insights and behavioural best practices.</Employerdescription>
      <Employerwebsite>https://www.cresta.ai/</Employerwebsite>
      <Compensationcurrency></Compensationcurrency>
      <Compensationmin></Compensationmin>
      <Compensationmax></Compensationmax>
      <Applyto>https://job-boards.greenhouse.io/cresta/jobs/4675293008</Applyto>
      <Location>Canada (Remote)</Location>
      <Country></Country>
      <Postedate>2026-04-18</Postedate>
    </job>
  </jobs>
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