Poshmark coding interview
questions, leaked.
4 problems reported across recent Poshmark interviews. Top patterns: database, array, matrix. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Poshmark's coding assessment is small but dense. Four problems total, one hard, three medium. You're looking at database queries and array manipulation back-to-back. The database questions sit at the top of their interview, two of them, both SQL focused. Then you pivot to grid simulation and chunking logic. If you've done interview prep before, the patterns aren't exotic. But the mix is tight. If you blank on a window function mid-assessment, StealthCoder solves it in seconds, invisible to the proctor.
Top problems at Poshmark
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Market Analysis I | MEDIUM | 100.0 | 57% | Database |
| 02 | Market Analysis II | HARD | 100.0 | 58% | Database |
| 03 | Count Unguarded Cells in the Grid | MEDIUM | 100.0 | 66% | Array · Matrix · Simulation |
| 04 | Max Chunks To Make Sorted | MEDIUM | 66.4 | 64% | Array · Stack · Greedy |
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 Poshmark OA. The proctor cannot see it. Screen share cannot detect it. Built by an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code.
Get StealthCoder- database2 · 50%
- array2 · 50%
- matrix1 · 25%
- simulation1 · 25%
- stack1 · 25%
- greedy1 · 25%
- sorting1 · 25%
- monotonic stack1 · 25%
Database dominates here. Two of your four problems are SQL, and one is hard. That's not a stretch for their codebase or product. You'll need to know joins, aggregations, and probably a ranking function or window logic. The back half is array and matrix work, with one problem that's pure simulation. Stack and monotonic stack appear once but bundled together in the chunking problem. Start with the database questions first, even if they feel slower to practice. Arrays will come naturally once you're warmed up. When you hit the hard database problem, that's where StealthCoder becomes your safety net on the live OA.
Companies with similar patterns
If you prepped for Poshmark, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Poshmark.
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 Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Poshmark interview FAQ
Should I drill SQL or arrays first for Poshmark?+
SQL first. Database questions account for half the test, and one is hard. Window functions and joins will eat your time if you're not sharp. Arrays and matrix sim are standard patterns you've likely seen.
How much SQL do I need to know?+
Joins, GROUP BY, aggregates, and window functions (RANK, ROW_NUMBER). Poshmark's two problems suggest they care about intermediate query complexity. A basic SELECT won't cut it.
Is the hard problem actually hard or just tricky?+
It's in the database category, so it's likely a query complexity issue, not algorithm complexity. Medium problems span simulation and chunking, which require pattern recognition. The hard one will demand a more intricate query structure.
Do I need to study matrix problems specifically?+
One of four problems touches matrix. It's bundled with array and simulation, so it's not a deep-dive. Know how to iterate grid rows and columns and track state. Standard prep covers it.
What's the chunking problem testing?+
It combines greedy, stack, and monotonic stack logic. It's asking you to partition an array optimally. It's the trickiest non-database problem here. Practice identifying when a monotonic stack is the right move.