CrackingWalnuts
1,447 topics across 24 sections, plus 37 blog posts. Browse everything in one place.
Mental models, patterns, Java/Python/Go primitives, lock-free programming, debugging.
Object-oriented design problems with class diagrams and design patterns.
Kernel, processes, memory, networking stack, debugging tools.
TCP/IP, HTTP, TLS, DNS, RFCs, and how the internet really works.
Load balancers, queues, caches, databases, observability, security.
LLM fundamentals, transformer internals, vector search, RAG, reasoning, agents, training, inference serving, evals, observability, and safety.
Consensus, replication, sharding, probabilistic data structures, geospatial indexing.
Pattern-based solutions in Python, Go, Java, C, and C++ for coding interviews.
Quick-reference for foundations, networking, data, distributed systems, AI, and more.
Real interview problems with hints, follow-ups, and full walk-throughs.
Deep dives on the technologies that power modern systems.
Trade-off frameworks for the choices that shape your system.
Internal developer platforms, golden paths, and platform org patterns.
Common failure modes, detection, mitigation, and post-mortem patterns.
DORA, SPACE, cost attribution, capacity planning.
SOC 2, GDPR, audit trails, data classification, access reviews.
Hiring, mentoring, decision-making, technical strategy at scale.
Team topologies, conway's law, scaling structures.
Interview prep for staff and principal-level engineers.
Level overviews and detailed question breakdowns, from Fresher to Principal.
Loop structure, level expectations, and study plans by company.
Level-by-level study plans from Fresher through Principal.
Foundational research papers in distributed systems and AI, with short summaries.
Interactive calculators, visualizers, and simulators for system design.
In-depth system design articles and technical deep dives.