Senior Software Engineer, Backend - Platform Team

Cresta provides a unified AI platform for conversational AI agents, real-time human agent augmentation, and conversation intelligence. The Senior Software Engineer will build and scale backend systems for agent assist integrations, authentication, security, and real-time conversation processing while supporting enterprise customer integrations and platform reliability.

Responsibilities:

• Contribute to building the best-in-class company in addition to building the best-in-class product
• Architect systems that manage real-time conversation state, context propagation, and session lifecycle
• Play a substantial role in the agent assist integration process (chat and email) and authentication engineering team
• Work with Cresta product and engineering teams, build and continuously improve the Cresta platform and new product requirements
• Stay closely with customers and their requirements, analyze the technical tradeoffs, own the customer facing deliverables
• Demonstrate the engineering best practices in deliverables and daily work. Uphold others to the same high standards
• Technical ownership in a substantial part of the Cresta authentication stack
• 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

Requirements:

• 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 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
• 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 in building authentication systems is a plus