Algorithm patterns & code templates
End-to-end architecture problems
Design patterns & practical code
Deep dives into core tech
Production systems & operations
TCP, HTTP, TLS, DNS & more
Consensus, replication & more
Kernel, networking & system calls
Quick reference cards for interviews
“DX is not just tooling. It encompasses CI speed, documentation, onboarding, environment setup, and inner loop latency”
“Employee referrals consistently produce the highest-quality hires with the shortest time-to-close. Build a referral program with meaningful incentives ($5,000-10,000 bonuses are standard at tech companies) and make the process frictionless for referring employees”
Full PostgreSQL with time series superpowers bolted in at the storage layer
Decouples producers from consumers, allowing asynchronous processing and better fault tolerance
PBFT handles Byzantine faults: nodes that can lie, send conflicting messages, or behave arbitrarily. Raft and Paxos only handle crash faults where nodes either work correctly or stop completely. If you need consensus in an adversarial environment, you need something like PBFT