Senior Backend Engineer - AI Agent Runtime (Remote)

FDE Times; Canada; Remote; CAD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, dental, and vision plans

Parental leave

Health & Wellness allowance

Remote work stipend

Lunch reimbursement

PTO: 3 weeks in Canada

Job summary

Cresta is seeking a senior software engineer in Canada to design and operate real-time AI agent infrastructure, delivering low-latency runtimes for voice and chat agents and a serverless-style function platform. You will own session management and multi-channel support in a Kubernetes-based environment.

You will build developer tooling, CLI tools, SDKs, and local dev environments, improve production observability, on-call readiness, and code quality, and mentor others as part of a collaborative,

Qualifications

• 5+ years of software engineering experience.
• Strong Python and Go proficiency with focus on infrastructure, platform, or systems work.
• Experience with distributed systems concepts such as consistency and fault tolerance.

Responsibilities

• Build real-time AI agent infrastructure and low-latency runtimes.
• Solve distributed session management and crash recovery across scaled-out workers.
• Develop a serverless-style function execution platform with orchestration and autoscaling.
• Create developer tools, CLIs, and testing frameworks to speed engineering cycles.
• Improve production quality through observability and incident response.

Skills

Python

Go

Distributed systems

Kubernetes

Cloud-native infra

Developer tooling

Communication

Testing & code review

On-call

AI/LLM workflows

Tools

CLI tools

SDKs

Local dev environments

Internal platforms

Job description

Cresta is seeking a senior software engineer in Canada to design and operate real-time AI agent infrastructure, delivering low-latency runtimes for voice and chat agents and a serverless-style function platform. You will own session management and multi-channel support in a Kubernetes-based environment.

You will build developer tooling, CLI tools, SDKs, and local dev environments, improve production observability, on-call readiness, and code quality, and mentor others as part of a collaborative,