Senior
Full senior loop prep. All patterns, hard problems, the complete SD bank, every production technique and tradeoff, and behavioral that probes leadership, judgment, and strategic thinking.
Overall progress
0 / 27
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All 22 patterns
Be able to triage AND solve from every pattern.
Browse all patterns
Hard problems
0/11 · 0%The hardest in the bank — interview-grade for senior loops.
Minimum Window Substring
hard · blind75
First Missing Positive
hard
Reverse Nodes in k-Group
hard
Find Median from Data Stream
hard · blind75
Sliding Window Median
hard
Merge k Sorted Lists
hard · blind75
Smallest Range Covering K Lists
hard
Alien Dictionary
hard
Word Search II
hard · blind75
Largest Rectangle in Histogram
hard
N-Queens
hard
Full SD prompt bank
All 10 canonical prompts including the long tail.
Browse all prompts
All production techniques
Backoff, idempotency, hedged requests, leases, quorum — the senior-engineer toolbox.
Browse all techniques
All tradeoffs
Including the deeper ones like 2PC vs Saga, multi-leader replication.
Browse all tradeoffs
Senior behavioral
0/16 · 0%Leadership without authority, conflict, strategic thinking, hiring, hard feedback.
Tell me about a time you strongly disagreed with a peer's technical decision. How did you handle it?
Conflict & Influence
Describe a time you disagreed with your manager. What did you do?
Conflict & Influence
Tell me about a technical decision you made that turned out to be wrong. What was the impact and what did you learn?
Failure & Ownership
Describe how you've helped a junior or struggling engineer grow.
Leadership & Mentorship
Tell me about a time you led a project where you had no direct authority over the contributors.
Leadership & Mentorship
Tell me about a time you had to cut scope to hit a deadline.
Prioritization & Tradeoffs
Describe a time you had to decide between rewriting a system and improving it incrementally.
Technical Judgment
Tell me about a time you said no to a significant request from leadership or a major stakeholder.
Prioritization & Tradeoffs
Walk me through a production incident you led the response to.
Crisis & Operations
Tell me about a multi-quarter technical vision or architecture you drove. What was the long view?
Strategic Thinking
Tell me about a hire you advocated for who didn't work out, or one you opposed who did.
Hiring & Team
Describe a time you worked closely with an underperforming engineer (peer or report). What happened?
Hiring & Team
Describe a time a security review or compliance requirement forced you to change a design late.
Cross-Functional Collaboration
Tell me about a time you gave someone difficult feedback. How did they receive it?
Growth & Feedback
Tell me about a piece of feedback you received that was hard to hear. What did you do with it?
Growth & Feedback
Tell me about a time you had to say 'I don't know' in a high-stakes setting.
Self-Awareness
Big O — full quiz
Every question, including the multi-input and amortized cases.
Open Big O Quiz
Mock interview loops
Run the Senior preset under timer pressure. Identify gaps, drill weakest patterns.
Start a senior mock