CrackingWalnuts
Explore
DSA Templates
35Algorithm patterns & code templates
System Design
38End-to-end architecture problems
Low Level Design
67Design patterns & practical code
Key Technologies
59Deep dives into core tech
Infrastructure
35Production systems & operations
Networking & Protocols
51TCP, HTTP, TLS, DNS & more
Distributed Systems
38Consensus, replication & more
Linux Internals
84Kernel, networking & system calls
Cheat Sheets
24Quick reference cards for interviews
Recent Posts
System Design: News Aggregator (100K Sources, Dedup, Personalized Ranking)
System Design
Apr 5, 2026 · 86 min
System Design: Dropbox (File Sync, Chunking, and Deduplication)
System Design
Apr 2, 2026 · 69 min
System Design: Object Storage (Erasure Coding, Flat Namespace, and Exabyte Scale)
System Design
Mar 31, 2026 · 54 min
Leadership
DirectorBuilding Engineering Brand
“Engineering brand compounds like interest. Stripe published technical blog posts for years before they became the default 'engineers love working there' company. Start now, expect results in 18 months.”
Org Design
GrowthSRE Team Structure
“Google's original SRE model caps operational work at 50% of an SRE's time. The other 50% goes to engineering projects that improve reliability. If toil exceeds 50%, tickets get redirected back to the development team until the balance is restored”
530+Articles
27Interactive Tools
16Categories
6Learning Stages
Learning Path
Discover Today
Grafana Tempo
S3-native distributed tracing with no index to maintain and TraceQL for structural queries
Service Discovery & Registration
Services need to find each other dynamically when IPs change constantly in containerized environments
BM25 — Best Matching 25
Ranks documents by combining term frequency saturation, inverse document frequency, and document length normalization. It fixes the biggest problem with raw TF-IDF: long documents no longer dominate results, and repeating a word 50 times does not give you 50x the score