Senior Software Engineer, Backend - Platform Team Cresta unlocks the true potential of the customer experience, turning every conversation into a competitive advantage. Cresta’s unified AI platform combines conversational AI agents, real-time human agent augmentation, and comprehensive conversation intelligence to drive revenue and efficiency gains across every channel. The world’s leading companies, including United Airlines, Cox Communications, and Marriott, use Cresta to power world-class customer experiences every day.

Born from the Stanford AI Lab, Cresta has raised more than $270 million from the world’s leading investors, including a16z, Greylock, and Sequoia. Cresta’s leadership includes some of the leading minds in AI today. Our CEO, Ping Wu , founded and led Google’s Contact Center AI and Vertex AI platforms before joining Cresta to build the future of AI-driven customer experiences.

Over the next few years, AI is going to redefine how people all over the world interact with businesses every day. Our long term vision is to build a robust, reliable, secure, and extensible foundation that supports continued innovation, satisfies enterprise customer requirements, and keeps operational costs in check. This role is focused on building various backend systems needed to enable successful customer integrations: Enable agent assist integration for chat and email.

This involves working with the frontend platform team, ML teams, infra team and other backend services. Expand our backend agent assist services to meet customer requirements and feature requests. Address any customer issues that block integrations, affect user experience or system performance.

Work with the auth and security team to meet Cresta’s diverse authentication and security needs for internal workflows and external customer facing integrations.



We are looking for strong versatile backend engineers who want to work at the intersection of distributed systems, real-time communication, enterprise integrations, and IAM systems. Design robust integrations with major CCaaS platforms and customer systems.

Specialized Auth Experience : Join the Cresta auth team and help build specialized authentication systems to authenticate users, service accounts, virtual agents, server workloads, cloud based authentication for external integrations, etc. Work directly with the frontend platform team to build solutions for agent assist integrations for various channels such as chat and email and help rollout these integrations in customer environments. If you’re a robust backend engineer who wants to apply your expertise to real-world AI systems operating inside complex enterprise ecosystems, and expand your expertise in auth, this role offers that opportunity.

Contribute to building the best‑in‑class company in addition to building the best‑in‑class product. Play a substantial role in the agent assist integration process (chat and email) and authentication engineering team. Stay closely with customers and their requirements, analyze the technical tradeoffs, own the customer facing deliverables.

Technical ownership in a substantial part of the Cresta authentication stack. 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. ~ Solid understanding of distributed systems and real‑time communication architectures. ~ Familiarity with AI Agents, Virtual Agents, or LLM‑based systems is a plus. ~ Experience with cloud platforms such as AWS, GCP, or Azure. ~ Experience in building authentication systems is a plus. ~ We offer Cresta employees a variety of medical, dental, and vision plans, designed to fit you and your family’s needs ~ Paid parental leave to support you and your family ~ Work from home office stipend to help you succeed in a remote environment ~ Lunch reimbursement for in‑office employees ~ Compensation for this position includes a base salary, equity, and a variety of benefits. Actual base salaries will be based on candidate‑specific factors, including experience, skillset, and location, and local minimum pay requirements as applicable.

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📌 Senior Software Engineer, Backend - Platform Team (Toronto)
🏢 Cresta
📍 Toronto