Patreon coding interview
questions, leaked.
3 problems reported across recent Patreon interviews. Top patterns: string, stack, dynamic programming. The list below is what most reported candidates actually saw, plus the honest play if you can't grind all of it.
Patreon's coding assessment hits you with three problems across the full difficulty spectrum, and the gap between easy and hard is steep. You're looking at string manipulation with a stack, a rate-limiter design question, and a hard tree traversal problem that demands both DFS and dynamic programming. The good news: the dataset is small enough that you can map every angle before your OA. If you blank on the tree problem mid-assessment, StealthCoder surfaces a working solution invisibly while the proctor watches your screen.
Top problems at Patreon
| # | Problem | Diff | Frequency | Pass % | Patterns |
|---|---|---|---|---|---|
| 01 | Simplify Path | MEDIUM | 100.0 | 48% | String · Stack |
| 02 | Logger Rate Limiter | EASY | 76.2 | 77% | Hash Table · Design · Data Stream |
| 03 | Binary Tree Maximum Path Sum | HARD | 68.2 | 41% | Dynamic Programming · Tree · Depth-First Search |
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 Patreon OA. The proctor cannot see it. Screen share cannot detect it. Built by a senior engineer who knows the OA is theater. This is the script.
Get StealthCoder- string1 · 33%
- stack1 · 33%
- dynamic programming1 · 33%
- tree1 · 33%
- depth first search1 · 33%
- binary tree1 · 33%
- hash table1 · 33%
- design1 · 33%
- data stream1 · 33%
Patreon leans toward data structures that trip up mid-level engineers: stacks, trees, and hash tables. String problems appear once, but the stack component of Simplify Path is where candidates slip. Design and data-stream concepts surface in the rate-limiter question, which tests both your API thinking and your hash-table instincts. The hard problem, Binary Tree Maximum Path Sum, is the filter. It combines tree traversal, DFS, and DP reasoning in one shot. Drill that one first. When you hit the live OA, the easy and medium should fall in under 30 minutes, leaving time for the hard. StealthCoder is your hedge if the tree recursion gets tangled or your DP state logic breaks under pressure.
Companies with similar patterns
If you prepped for Patreon, these companies recycle ~60% of the same topics.
You've seen the list.
Now make sure you pass Patreon.
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 a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Patreon interview FAQ
Should I study the rate-limiter design problem first or the tree problem?+
Start with Binary Tree Maximum Path Sum. It's marked hard and requires multiple pattern layers (DFS, DP, tree logic). The rate-limiter is more straightforward once you understand hash-table time windows. Patreon's assessment weights the hard problem heavily in signal.
Is one stack problem enough to prepare for Patreon's string question?+
Simplify Path is the only stack problem reported in Patreon's dataset, so drilling Simplify Path directly is mandatory. Understand path normalization, edge cases (double slashes, dots), and how to build the result after popping. One problem, full focus.
How much time should I spend on hash-table design before the OA?+
The Logger Rate Limiter combines hash tables with design thinking. Spend 20-30 minutes understanding the API contract (what happens on repeated timestamps, how you expire old entries). Hash tables appear in one problem here, so it's not a volume game.
What's the biggest trap in Patreon's assessment for mid-level engineers?+
The jump from medium to hard. Simplify Path and Logger Rate Limiter are solvable with standard patterns. Binary Tree Maximum Path Sum requires you to track both max-path-ending-here and global max in the same DFS pass. Missing that transition loses you the hard problem.
Can I skip the easy problem and focus on medium and hard?+
No. Logger Rate Limiter tests design chops and hash-table muscle memory under time pressure. Patreon interviewers watch your speed on easy to early-signal your confidence. Solve all three, but time-box the easy at 10-12 minutes.