Senior Backend Engineer - AI Agents & Real-Time CCaaS

FDE Times; Canada; Remote; CAD 110,000 - 160,000; Full time

Job summary

Cresta is seeking a backend engineer in Canada to design and build production-grade infrastructure for AI Agents operating inside enterprise CCaaS environments. You will work on real-time, distributed systems that manage conversation state, context propagation, and secure API integrations across voice and chat channels.

You will collaborate with ML research teams to operationalize AI capabilities, ensure reliable handoffs to human agents, and maintain high availability in mission-critical

Qualifications

• Strong backend engineering experience for production-grade systems.
• Experience building real-time, low-latency services at scale.
• Experience integrating with CCaaS platforms and enterprise systems.

Responsibilities

• Design and build scalable backend services integrating Cresta’s AI Agents with CCaaS platforms.
• Manage real-time conversation state and session lifecycle across channels.
• Implement seamless AI-to-human handoff with full context transfer.
• Collaborate with ML/AI teams to operationalize capabilities in live environments.

Skills

Backend engineering

Distributed systems

Real-time systems

CCaaS integrations

API design

Tools

CCaaS APIs

Job description

Cresta is seeking a backend engineer in Canada to design and build production-grade infrastructure for AI Agents operating inside enterprise CCaaS environments. You will work on real-time, distributed systems that manage conversation state, context propagation, and secure API integrations across voice and chat channels.

You will collaborate with ML research teams to operationalize AI capabilities, ensure reliable handoffs to human agents, and maintain high availability in mission-critical