Amazon
15 problems · 30% easy, 55% medium, 15% hard
DPArraysTrees And Graphs
Open company guideGuide + top problems on one page
Prep
Seven days before the loopstarts talking back.
Start with one email plan from Fin and Coco, then use company guides and practice reps when the interview target gets real.
The library is open on any device. The live coding rep opens on desktop.
- Free plan
- 7 days
- Company guides
- 103
- Articles
- 58
How to start
One plan. Then the real rep.
Fin handles pressure. Coco handles the sound of your thinking. Company guides come in when you know the target.
- 7 days. 7 emails. One habit you can use in the next live rep.
- When a company becomes real, jump into the guide and mapped problems.
- Practice out loud before the notes cool back into reading.
Free 7-Day Practice Primer
Not ready? Get the 7-day version by email.
One email a day for seven days. Learn what to say before and after the code, then decide if you want live coaching with Fin and Coco.
FinPressure habits
CocoCommunication shapeOne email per day for 7 days. Unsubscribe anytime.
Company Prep
Target a company.
Use company-specific context when you have a real target. This is the bridge from general reps to the interview you actually have scheduled.
Pick one company guide, skim the sourced context, then review the mapped problems from that same page.
Microsoft
14 problems · 30% easy, 60% medium, 10% hard
DPArraysTrees
Open company guideGuide + top problems on one page
VMware
14 problems · 13% hard, 80% medium, 7% easy
ArraysHash TablesGraphs
Open company guideGuide + top problems on one page
NVIDIA
14 problems · 25% easy, 60% medium, 15% hard
C++ArraysLinked Lists
Open company guideGuide + top problems on one page
13 problems · 35% easy, 52% medium, 13% hard
GraphsArraysDP
Open company guideGuide + top problems on one page
Netflix
13 problems · 20% easy, 60% medium, 20% hard
System Design AdjacentArraysTrees
Open company guideGuide + top problems on one page
Apple
12 problems · 25% easy, 60% medium, 15% hard
Design OopLinked ListsGraphs
Open company guideGuide + top problems on one page
DeepMind
12 problems · 38% hard, 54% medium, 8% easy
GraphsDPTrees
Open company guideGuide + top problems on one page
Articles & Guides
Close one weak spot.
Use the notes when you know exactly what needs tightening: one pattern, one system-design angle, one interview blind spot.
View all 58 articlesGuide11 min read
Binary Tree Interview Questions — return values where candidates drown
Most tree-round failures are not recursion bugs. They are helper-contract bugs. Here are the engineers, textbooks, and open-source trees that teach the return-value discipline tree rounds actually grade on.
Read article
Pattern11 min read
DP stops being scary when you name the state
DP is a compression problem, not a recursion trick. Ask one question — what does the future need to know from the past? — and state, recurrence, and iteration order fall out. Here are the engineers and open textbooks that teach it.
Guide10 min read
Five graph shapes and I've seen them all
BFS and DFS are the same algorithm with a different container. That reframe, plus five shape-names, covers most graph coding rounds. Here are the engineers and open textbooks that taught it.
Pattern16 min read
Sliding Window Algorithm — the pattern I learned the hard way
Sliding window is not a LeetCode trick. It is the pattern that has moved every TCP packet since 1981 and the pattern that powers every major API rate limiter in production today. Here are the engineers, RFCs, and open-source implementations that teach it.
Guide11 min read
The behavioral round grades whether you've shipped
A curator pass through the public writing that actually shapes how senior engineers think about behavioral rounds — Gergely Orosz, Lara Hogan, Will Larson, Charity Majors, Alison Green — plus the forum threads where real candidates compare notes. Use this as the map; the linked sources are the territory.
Next move
When you feel warm, practice out loud.
strongyes.io matters when the answer leaves the notebook and has to sound clear in real time.
Try Two Sum freeBrowse the problem library
The library is open on any device. The live coding rep opens on desktop.