Scaling Writes: Part 4 of 4 — Batching & Aggregation

Scaling Writes: Part 3 of 4 — Queues & Load Shedding

Scaling Writes: Part 2 of 4 — Sharding & Partitioning

Scaling Writes 1: Part 1 of 4 — Vertical Scaling & Database Choice

How to Design ChatGPT

CAP theorem in system design interviews

Kafka in 60s

4 ways to push real-time updates to clients. Most engineers only know 1.

Why System Design Interviews Ask You to Count Billions of Users Without a HashSet

Network Delay Time | Dijkstra's algo

Bloom Filters: Why They Allow False Positives But Never False Negatives

One ad goes viral and takes down your database — here's the fix

Minimum Window Subsequence | DP | Hard

Database transactions explained

Jump Game | Greedy

REST vs GraphQL vs gRPC: Which API wins in system design interviews?

Cursor pagination

YouTube Upload

Longest Valid Parentheses | Hard

Why your upload server should never touch the file bytes

Distributed transactions

4 Ways to Fix Cache Stampede

Paint House | Dynamic Programming | Hello Interview

B-tree vs LSM tree: which database index wins for your workload?

5 ways to scale reads. Most engineers only know 2.

Word Search Explained: Backtracking Is Just Two Lines of Code

How Instagram handles celebrities with 500M followers without melting their servers

Partition Equal Subset Sum Explained | Dynamic Programming (Subset Sum Pattern)

Most engineers get this wrong in an interview

Maximum Profit in Job Scheduling | Dynamic Programming Explained

What interviewers actually expect at mid-level vs senior vs staff engineer

Longest Increasing Subsequence | Dynamic Programming Explained

Maximal Square DP in under 60 seconds

How Slack scaled MySQL to 1.5 billion messages a day

Dynamic Programming in under 60 seconds

Intervals most important patterns

Binary Trees in under 60s

ACID Databases

Scaling reads in a distributed system

Consistent hashing in under 60s

"Give an Example of Critical Feedback You Received"

Top 3 database Indexes every engineer should know

Just Use Postgres

Tips for Technical Project Retrospectives

Advice for experienced engineers stuck at Senior

Are AI's going to take over behavioral interviews?

What are People Manager interviewers assessing?

Do I need back of the envelope calculations?