Senior Software Engineer, Backend; AI Agent Integrations

Cresta is on a mission to turn every customer conversation into a competitive advantage by unlocking the true potential of the contact center. Our platform combines the best of AI and human intelligence to help contact centers discover customer insights and behavioral best practices, automate conversations and inefficient processes, and empower every team member to work smarter and faster. Born from the prestigious Stanford AI lab, Cresta's co-founder and chairman is Sebastian Thrun, the genius behind Google X, Waymo, Udacity, and more.

Our leadership also includes CEO, Ping Wu, the co‑founder of Google Contact Center AI and Vertex AI platform, and co‑founder, Tim Shi, an early member of Open AI.

Cresta’s AI Agent team is building enterprise‑grade AI Agents that can operate inside real‑world contact center environments. A critical part of that mission is enabling our AI Agents to seamlessly integrate with customers’ CCaaS platforms (Contact Center as a Service), including voice and digital channels — and to smoothly transition conversations between AI and human agents when needed.

This role is focused on building the backend systems that allow our AI Agents to:

• Integrate deeply with leading CCaaS platforms
• Participate in live customer conversations across voice and chat
• Maintain full conversation state and context
• Perform real‑time actions within the CCaaS ecosystem
• Seamlessly hand off conversations to human agents — without losing context, history, or workflow state
• Support human agents with AI assistance after transfer

We are looking for strong backend engineers who want to work at the intersection of distributed systems, real‑time communication, enterprise integrations, and AI Agent orchestration.

This is not a pure research role — it is about building production‑grade infrastructure that enables AI Agents to operate reliably in mission‑critical customer environments.

• AI + Real‑Time Systems:
  Work on infrastructure that enables AI Agents to participate in live conversations at scale.
• Enterprise‑Grade Integrations:
  Design robust integrations with major CCaaS platforms and customer systems.
• Human‑AI
  
  Collaboration:
  
  Build the systems that make AI‑to‑human handoff seamless, contextual, and reliable.
• High‑Impact Engineering:
  Your work directly determines how smoothly AI Agents operate in production environments.

• Design and build scalable backend services that integrate Cresta’s AI Agents with customers’ CCaaS platforms.
• Architect systems that manage real‑time conversation state, context propagation, and session lifecycle.
• Implement seamless AI‑to‑human handoff mechanisms, ensuring full context transfer and minimal disruption to the customer experience.
• Develop secure and reliable integrations with CCaaS APIs (voice, chat, messaging, routing, agent desktop, etc.).
• Collaborate closely with ML engineers and AI researchers to operationalize AI Agent capabilities in live environments.
• Ensure high availability, low latency, and strong observability for real‑time conversation systems.
• Implement authentication, authorization, compliance, and enterprise security best practices across integrations.
• Drive improvements in reliability, performance, and scalability in production environments handling high interaction volumes.

• Bachelor’s degree in Computer Science or related field.
• 5+ years of experience building scalable backend systems in production environments.
• Strong experience designing and maintaining robust APIs (REST, gRPC).
• Solid understanding of distributed systems and real‑time communication architectures.
• Experience integrating with third‑party enterprise platforms and APIs.
• Experience working with CCaaS platforms or contact center systems is a strong plus.
• Familiarity with AI Agents, Virtual Agents, or LLM‑based systems is a plus.
• Experience with containerized environments (Kubernetes, Docker).
• Experience with cloud platforms such as AWS, GCP, or Azure.
• Strong understanding of system reliability, observability, and security in enterprise environments.

• We offer Cresta employees a variety of medical, dental, and vision plans, designed to…