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Senior Software Engineer, Backend (AI Agent Runtime)

Cresta· Engineering
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Remotefull-timePosted 3mo ago

About the role

Senior backend engineer focused on real-time AI agent runtime, distributed systems, and developer tooling at Cresta. Remote Canada role building stateful, low-latency infrastructure for AI agents, with On-call and production ownership.

Responsibilities

  • 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.
  • Solve distributed systems problems: own session management across scaled-out workers — including affinity, checkpointing, crash recovery, and consistency under concurrent access.
  • Build a function execution platform: own a serverless-style runtime where customers deploy custom logic — build orchestration, container lifecycle, autoscaling, and versioned rollouts.
  • 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.
  • Raise the bar on production quality: drive observability, incident response, and engineering best practices across the team.

Qualifications

  • 5+ years of software engineering experience, with meaningful time spent on infrastructure, platform, or systems work.
  • Strong Python and Go — both are core to this role, not one primary and one secondary.
  • Deep understanding of distributed systems: consistency, fault tolerance, state management, concurrency.
  • Experience with Kubernetes and cloud-native infrastructure.
  • Experience building developer-facing tooling — CLIs, SDKs, local dev environments, or internal platforms.
  • Strong communicator who can drive technical decisions, write clear design docs, and mentor others.
  • High bar for code quality — thorough testing, thoughtful code review, and sustainable engineering practices.
  • Comfort operating what you build — on-call, incident response, and production ownership.
  • AI-native workflow — actively use LLMs and AI-assisted tools in daily development.

Skills

Required:PythonGoDistributed Systems

Benefits

  • Medical, dental, and vision plans
  • Paid parental leave
  • Monthly Health & Wellness allowance
  • Work from home office stipend
  • Lunch reimbursement for in-office employees
  • PTO: 3 weeks in Canada
Last updated Sep 17, 2026. Interested? Apply on the company site.

About Cresta

AI Agents for Every Customer Conversation | Cresta

AI Agents for Every Customer Conversation | Cresta

AIAI AgentAutomationCXCrestaCustomer ExperiencePlatformorchestration
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