Process, Questions & AI Prep Tips
Toast is the leading restaurant technology platform, providing point-of-sale systems, payment processing, online ordering, and restaurant management software for over 100,000 restaurants. Engineering challenges include building reliable POS hardware-software systems that work even when internet connectivity is lost, the payment processing infrastructure for restaurant transactions, and the data platform that gives restaurant owners insights into their business.
A 30-minute call about your background in point-of-sale systems, fintech, or restaurant technology.
A 60-minute coding interview covering algorithms and data structures.
Design a Toast system such as the offline-capable POS order management system, restaurant payment processing, kitchen display system, or the restaurant analytics platform.
Two to three rounds covering deeper design, coding, and behavioral interviews emphasizing restaurant operator empathy.
Design Toast's offline-capable POS system that continues processing orders during internet outages.
How would you build a kitchen display system (KDS) that routes orders to the right station in real time?
Design the Toast payment processing system that handles split checks, table tabs, and tip processing.
How would you build Toast's inventory management system that decrements stock when menu items are sold?
Design a restaurant analytics dashboard that shows real-time sales, labor cost, and menu performance.
How would you implement menu management that handles complex modifications, 86'd items, and time-based menus?
Design Toast's online ordering system that integrates with third-party delivery platforms.
How would you build a loyalty and rewards program that works across multiple restaurant locations?
Design the Toast data sync system that reconciles local POS transactions with the cloud when connectivity restores.
Tell me about a time you built a system that had to work reliably in environments with unreliable connectivity.
Study offline-first application patterns — Toast POS must work during internet outages and sync data when connectivity returns. CRDTs, local-first data, and conflict resolution are key concepts.
Understand restaurant operations at a practical level — service flow, kitchen coordination, check management, and how busy restaurants use technology. Genuine restaurant empathy is valued.
Review payment processing for POS systems including card present transactions, EMV chip processing, and how tips are added post-authorization.
Toast operates with Android-based hardware — knowledge of Android development and embedded-style reliability engineering is valuable for hardware-facing roles.
Restaurant technology has a high reliability bar — a POS failure during the dinner rush is a serious business impact. Design for exceptional reliability and graceful degradation.
AissenceAI provides AI-powered interview coaching tailored specifically to Toast's interview process. Practice with realistic mock interviews that mirror Toast's 4-round format, get real-time feedback on your coding solutions, and receive personalized tips based on your performance.
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