Coding fluency
Implement an LRU cache. Explain your data structures, test capacity one, and walk through an eviction.
What a strong answer demonstrates
Correctness, edge cases, and time / space complexity.
Prepare for Toast with a focused mix of coding, design, and communication. Start with your job description and confirm the interview loop with your recruiter.
6 Practice picks
2 Interview reports
5 Levels mapped
01 / MAKE YOUR NEXT SESSION COUNT
Your preparation, made concrete.
System design
Design a notification service. Clarify delivery guarantees, model the data, then handle retries and duplicate events.
What a strong answer demonstrates
Clear requirements, a working baseline, and explicit trade-offs.
Behavioral storytelling
Describe a technical decision you changed after receiving feedback. Explain your contribution and the outcome.
What a strong answer demonstrates
Specific actions, honest reflection, and measurable impact.
BEFORE YOU PRACTICE
Ask your recruiter.
Get the details that a generic company guide cannot know.
- Which team and level is this opening for, and what does success look like?
- What rounds, durations, and evaluation criteria should I prepare for?
- Which languages, tools, and AI assistance are permitted?
- Will design focus on frontend, backend, infrastructure, or another specialty?
- Are there accommodations or preparation materials I should request?
Toast practice problems
Company-linked challenges and related lessons from our library. Not a prediction of your interview.
Challenge
Difficulty 6/10
Two Stack Queue
Challenge
Difficulty 4/10
Least Missing Positive Number
Challenge
Difficulty 5/10
Merge Sorted Linked Lists
Challenge
Difficulty 8/10
The Coin Change Problem
Challenge
Difficulty 4/10
Bottom Left Node Value
Challenge
Difficulty 6/10
Next Greater Element in a Circular Array
Real interview experiences
2 reports from candidates who interviewed at Toast.
What people at Toast say
Reviews originally posted on Glassdoor.
Toast offers an environment full of interesting problems and exciting innovations in our field. If you are a newer engineer, you will find mentorship all around and plenty of opportunities to test and grow your skills. If you are a more seasoned engineer, you'll be able to practice what you've learned on a scaling architecture.
All Pros here - I worked in the DevX Engineering team, they were all amazing people, all willing to help and set you up for success. If you're in need of help, they will give it and be there for you. Really an amazing time, thank you for the opportunity.
Great product, great culture, great leadership. Interesting technology choices. Company is shifting to event-driven architectures which would be a good learning experience.
Cross-team collaboration is a must and everyone is helpful. Other engineers will stop what they're doing to explain their part of the business if you need clarification
The opportunity that we have to become the leader in the restaurant POS industry is the kind that you're lucky to see even once in your career. It remains a privilege to work alongside the incredibly talented team here.