Principal Software Engineer, IQ Grow

Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. At Toast, the IQ Grow team is on a mission to scale new, high-impact go-to-market initiatives. By combining the cutting-edge innovation of AI agentic solutions with human-in-the-loop workflows and touchpoints, we are redefining how restaurants connect with their guests. Our goal is to deliver a truly personalized marketing experience that empowers Toast customers to build lasting relationships, drive engagement and grow their businesses. If you're excited about pioneering at the intersection of advanced AI and human-centered design to make a real-world impact, we’d love to have you on the team! You will be a key part of a high-impact, high-ownership engineering team solving complex challenges in a fast-moving product space. Your engineering leadership will be balancing technical excellence alongside a strong product mindset to solve for continuous growth within both the team and our product space. A day in the life (Responsibilities) Design, build and maintain high performing, flexible, and scalable solutions that help restaurants deliver a best-in-class guest experience : define and execute the technical architecture for AI agents within Marketing and Demand Generation domains, ensuring systems are scalable, reliable, and secure. Collaborate closely with Product, Design and Engineering stakeholders Maintain a strong hands-on presence, writing code, prototyping new patterns, and resolving complex technical bottlenecks under load. Collaborate with Principal and Senior Principal Engineers across Toast to align on best practices, agent patterns, and spec-driven development paradigms. Guide, mentor, and elevate engineers within the Team area, fostering a culture of technical excellence and continuous lear