9 Toast Software Engineer Intern Interview Questions (2026)
Toast's SWE intern loop in 2026 is a recruiter screen, an online assessment, and a two-round virtual interview. Toast converts a high share of strong-performing interns to full-time new-grad offers, so the intern bar is calibrated as a future-hire signal. Restaurant-domain interest helps in the behavioral round.
By Sam K., Founder, InterviewChamp.AI · Last verified
Loop overview
Intern flow: recruiter → HackerRank OA (2 problems, ~60 minutes) → two 45-minute virtual rounds (one coding, one mixed coding + behavioral). Some interns get an additional 30-minute team-fit chat. Timeline is typically 3-5 weeks. Internships are based in Boston with remote options in select US states.
Behavioral (4)
Walk me through your favorite course project. What did you build?
Frequently askedOutline
Pick a project you know cold. Walk problem → design choices → implementation → results → lessons learned. Toast wants real reflection, not rehearsed answers. Be ready for 'what would you do differently'.
Why are you interested in interning at Toast?
Frequently askedOutline
Reference vertical SaaS, restaurant industry, or operational software interest. Mentioning a Toast restaurant you have visited adds authenticity. Show you understand Toast is more than POS — payroll, payments, online ordering, marketing.
How would you debug a slow API endpoint?
Occasionally askedOutline
Methodology answer. Reproduce, measure (logs, timings), isolate the slow component (DB query, external call, in-process work). Discuss tools: APM, slow-query log, profiler. Pick a concrete past example if you have one.
Tell me about a time you worked on a team where there was disagreement.
Occasionally askedOutline
STAR. Be specific about the disagreement, your role, how it resolved. Avoid villainizing teammates. Show you can advocate while staying open to other views. Restaurant tech requires constant collaboration with non-engineers.
Coding (LeetCode patterns) (4)
Given an array of integers, find the maximum sum of a contiguous subarray.
Frequently askedOutline
Kadane's algorithm. Track current_sum (reset to 0 if it goes negative) and max_sum. O(N) time, O(1) space. Edge cases: all negatives (return the max single element), empty array. Walk through the intuition before coding.
Implement a function that returns whether parentheses in a string are balanced.
Frequently askedOutline
Stack-based. Push opening brackets; on closing, pop and check it matches. Return true only if stack is empty at end. Handle (), [], and {}. O(N) time, O(N) space. Edge cases: empty string, unbalanced closing first.
Given two sorted arrays, merge them into one sorted array.
Frequently askedOutline
Two pointers. Compare arr1[i] vs arr2[j], append smaller, advance pointer. Append remainder at end. O(N + M) time, O(N + M) space for the output. Walk through edge cases: empty input, duplicates.
Given a 2D grid representing tables in a restaurant and a target table, return the shortest path from the kitchen to that table.
Occasionally askedOutline
BFS from the kitchen. Use a queue, track visited cells, return distance when target is reached. O(rows × cols) time and space. Discuss obstacles (walls, occupied tables). Walk through 4-direction vs 8-direction movement.
Technical (1)
Given a list of restaurant tables with capacity and a party size, return the smallest table that fits.
Frequently askedOutline
Sort tables by capacity. Binary search for the smallest capacity >= party size. O(N log N) sort + O(log N) search. Alternative: keep tables in a sorted structure (TreeSet/SortedList) for O(log N) per lookup. Discuss tradeoff if assignments are repeated.
Toast interview tips
- The OA gates everything. Practice HackerRank-style problems with timed runs.
- Toast intern interviews lean practical — domain-flavored prompts (restaurant scheduling, table assignment, menu parsing) appear regularly.
- Have one strong story about a debugging or shipping experience ready for the behavioral round.
- Java/Kotlin and TypeScript are the dominant stacks. Knowing one well is enough — coding rounds are language-agnostic.
- Intern conversion to full-time at Toast is strong for high performers. Treat the internship as a 12-week extended interview.
Frequently asked questions
How long is Toast's SWE intern interview process in 2026?
Most reports show 3-5 weeks from OA to offer. Intern hiring moves faster than new-grad because team-match happens during the internship.
How many rounds are in Toast's SWE intern onsite?
Two virtual rounds in 2026, typically 45 minutes each. One coding, one mixed coding + behavioral.
Does Toast hire international SWE interns?
Yes, Toast has sponsored F-1 OPT/CPT and J-1 for interns. Confirm with your recruiter for 2026.
What is Toast's intern conversion rate?
Publicly reported anecdotal numbers from 2026 suggest strong performers convert at high rates. Internships function as extended interviews.
Do I need restaurant experience to intern at Toast?
No, but even brief food-service or hospitality exposure helps you ground answers in real operator scenarios. Reading Toast's engineering blog or trying a Toast restaurant before the interview is enough.