Postmates coding interview
questions, leaked.
3 problems reported across recent Postmates interviews. Top patterns: string, sorting, hash table. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Postmates' coding assessment is a short sprint. Three problems, one easy and two medium, no hard rounds to tank you. String and sorting dominate the question pool, which means pattern-matching and frequency-counting logic are their bread and butter. You're looking at hash tables, binary search, and sliding windows as supporting tools. The compressed scope is both good and bad: good because you can drill the real patterns in a week, bad because any blind spot gets exposed fast. If you hit a wall on the live OA, StealthCoder runs invisibly during screen share and surfaces a working solution in seconds, so you stay ahead of the clock.
Top problems at Postmates
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Determine if Two Strings Are Close | MEDIUM | 100.0 | 54% | Hash Table · String · Sorting |
| 02 | Most Beautiful Item for Each Query | MEDIUM | 98.1 | 62% | Array · Binary Search · Sorting |
| 03 | Find the K-Beauty of a Number | EASY | 98.1 | 62% | Math · String · Sliding Window |
Frequencies derived from public community-tagged interview reports. Click a row to view on LeetCode.
You have a week, maybe less. You can't out-grind the list above. StealthCoder runs invisibly during the actual Postmates OA. The proctor cannot see it. Screen share cannot detect it. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage.
Get StealthCoder- string2 · 67%
- sorting2 · 67%
- hash table1 · 33%
- counting1 · 33%
- array1 · 33%
- binary search1 · 33%
- math1 · 33%
- sliding window1 · 33%
The dataset is small but tells a clear story. String problems appear twice, sorting twice, and both are foundations for the medium-difficulty items. 'Determine if Two Strings Are Close' chains hash tables and counting to solve a frequency-matching puzzle. 'Most Beautiful Item for Each Query' layers array traversal with binary search, testing whether you can optimize beyond brute force. The easy problem, 'Find the K-Beauty of a Number', uses sliding windows and math on a string representation, a warm-up that builds confidence. Drill string manipulation and frequency maps first, then lock in binary search logic for range queries. Sorting isn't just a topic here, it's the backbone of half the problems. When you sit down for the OA, you'll recognize the patterns immediately. StealthCoder is your hedge if a variant catches you off guard and you need a reference solution in real time.
Companies with similar patterns
If you prepped for Postmates, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Postmates.
Memorizing every problem above in a week is a fantasy. StealthCoder is the hedge: an AI overlay that's invisible during screen share. It reads the problem on screen and surfaces a working solution in under 2 seconds. Built by an engineer who got tired of watching his cohort grind for six months and still get filtered at the OA stage. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Postmates interview FAQ
Should I focus on string problems for Postmates?+
Yes. String appears in 2 of 3 problems, and both require clean frequency counting or substring logic. Pair string drills with hash-table and sorting basics. The easy problem uses strings too, so mastery here is a baseline.
Do I need to be strong at binary search for this assessment?+
Binary search shows up in one medium problem, 'Most Beautiful Item for Each Query', which tests range queries on a sorted array. It's not the focus, but it's a differentiator between passing and strong performance. Drill it after string patterns lock in.
How many hash-table problems should I solve before the OA?+
Hash tables appear in one medium problem alongside string and sorting. Since Postmates' pool is small, solve 5 to 10 solid frequency-counting problems. One of the three questions directly tests this pattern, so don't skip it.
Is the easy problem worth practicing if I'm strong at medium?+
Yes. 'Find the K-Beauty of a Number' combines math, string, and sliding windows in a compact way. It's a confidence builder and a warm-up for the harder problems. The OA starts easy, so lock it in and build momentum.
What's the best order to study for Postmates?+
String manipulation and sorting first, then hash-table frequency patterns. Add binary search and sliding window last. With only three problems, depth beats breadth. Solve variants of each topic rather than grinding different topics shallow.