# Toast Interview Guide (2026): Restaurant Tech Engineering

Source: https://www.techinterview.org/companies/toast-interview-guide/
Updated: 2026-07-12 · techinterview.org

**TL;DR —** Toast's engineering interview moves through a recruiter screen, a technical coding screen, and a final loop that combines coding, system design, and behavioral rounds. Expect problems rooted in real restaurant operations — order flow, payments, and offline-tolerant point-of-sale behavior — rather than abstract puzzles, and be ready to reason about trade-offs the way a working engineer would. Toast builds on a JVM stack with Android on its handheld hardware, so depth in one core language plus strong fundamentals counts more than chasing breadth.

Toast is the dominant US restaurant POS platform — over 100K restaurants, hardware and SaaS combined. The interview values offline-first thinking and payments expertise. They specifically hire engineers who can reason about hardware constraints, network unreliability, and the chaos of a Friday-night dinner rush.

## Process

Recruiter screen → 45-minute [coding phone](/algorithm-patterns-cheat-sheet/) (DSA-flavored but practical) → onsite virtual: 2 coding, 1 [system design](/category/system-design/), 1 [behavioral](/post/3233460379/behavioral-interview-questions-2026-star-method-amazon-leadership-principles-and-winning-answers/), 1 hiring manager. Some roles add a domain round (payments, hardware integration, or Android for KDS team). Cycle: 3–4 weeks.

## What they actually ask

- Design an offline-capable POS that [syncs orders when network returns](/post/3233460997/system-design-collaborative-editing/). Focus on how a terminal keeps taking orders and payments with the network down, then reconciles on reconnect. Interviewers probe your conflict-resolution strategy — what happens when two terminals edit the same open check, and how you avoid double-charging on replay.

- Design payment processing with PCI compliance and tokenization. Know why card data never touches your servers in the clear — the terminal or gateway tokenizes it, and you store the token, not the card number. Expect follow-ups on scope reduction, the settlement flow from authorization to capture, and how you handle refunds and disputes.

- Design online ordering with real-time menu sync across hundreds of locations. The hard part is propagating a menu or price change to every location's devices fast without hammering a central service. Talk through push vs. pull, per-location caching, and what happens to in-flight carts when an item goes 86'd mid-order.

- Coding: queue/stack/heap [problems](/problems-by-topic/), often framed around order processing or kitchen display. Expect a priority queue for ticket routing, a stack for order undo, or a heap for the next N tickets by prep time. Practice mapping a restaurant-flavored prompt to the right structure fast and stating its [time complexity](/big-o-cheat-sheet/) out loud.

- Concurrency: handle simultaneous orders from POS, online, and third-party (DoorDash) channels. The core question is how three channels write to the same check without corrupting it — locking, optimistic concurrency, or an event log. Be ready to reason about race conditions on inventory (last item sold twice) and idempotency when a channel retries.

## Levels and comp (2026)

- SE I: $145K–$175K total. Entry level for new grads and early-career engineers; you're judged mostly on coding fundamentals and whether you can ship well-scoped tasks with guidance.

- SE II: $190K–$240K. The bar shifts to owning features end to end and handling ambiguity without hand-holding; most external hires with a few years of experience land here.

- Senior SE: $260K–$340K. Expect a real system design round plus questions on mentoring and cross-team impact, not just clean code. These bands are wide, and where you land inside them usually comes down to [negotiation](/post/3233474669/salary-negotiation-2026/).

- Staff: $360K–$470K. Interviews probe technical strategy and org-wide influence; you'll be asked to defend architectural bets and explain how you drive alignment across teams.

## Prep priorities

- Read up on offline-first sync (CRDTs, vector clocks, last-write-wins). Be able to explain the trade-off — last-write-wins is simple but silently drops data, while CRDTs and vector clocks preserve concurrent edits at the cost of complexity. Interviewers want to hear you pick the right one for a POS, not recite all three.

- Understand payment terminology: tokenization, settlement, chargebacks, EMV. Don't just define the terms — know the flow they sit in, from an EMV chip read through authorization, capture, and settlement to a chargeback that can land weeks later. Fluency here signals you understand where Toast makes its money.

- Toast is mission-driven — talking about restaurant industry pain points wins points

## Frequently Asked Questions

### Does Toast hire mobile engineers?

Yes. The KDS (Kitchen Display System) and Toast Go handheld run Android, so dedicated Android teams interview separately.

### How much does Toast pay vs FAANG?

Base is competitive but equity is smaller post-IPO. [Total comp](/total-comp-calculator/) lands ~70–80% of FAANG at the same level.

### What is the dress code for the interview?

Casual. Toast culture is relaxed. Show up in something you would wear to a coffee shop.