Staff/Senior Software Engineer (Voice AI Platform)

Join Toast, a company dedicated to building a restaurant platform that empowers restaurants to thrive. As a Staff Software Engineer on the Voice AI Team, you will play a crucial role in shaping the future of voice AI at Toast. You will design and build scalable backend services, lead complex projects, and mentor engineers at all levels. This is a unique opportunity to work in a greenfield space and make a significant impact on the company and the industry.

• Conceive and lead complex, cross-cutting projects from design through production, owning outcomes and driving alignment across stakeholders.
• Design, build, deploy, and maintain highly resilient and scalable backend services, applications, and core platform components supporting Toast's Voice AI platform.
• Shape the technical direction on your team and beyond by making architectural decisions, defining patterns, and reducing complexity for the engineers and teams that depend on your work.

• Experience with voice or conversational AI platforms is a plus, but not required
• Deep understanding of distributed systems, scalability, and production reliability
• Experience shipping complex, mission-critical production services and owning them long-term
• Track record of leading multi-person and multi-team projects end-to-end, from design through rollout
• Actively uses AI coding tools (e.g., Claude Code, Cursor) in day-to-day development and have caused others to become more proficient with AI coding tools
• Experience building and reasoning about AI-powered systems, including nondeterminism, evaluation strategies, observability, and cost management
• Bachelor’s degree in Computer Science, Software Engineering, Computer Engineering, or related field
• Basic familiarity with frontend development
• Experience developing AI-integrated products or features, with a practical understanding of how to ship and iterate on systems that incorporate LLMs or other AI capabilities
• 8+ years of experience with object-oriented languages such as Java or Kotlin
• Strong cross-team communication and collaboration skills; able to influence direction without formal authority both within your team and across the broader organization