01 — Layering Patterns
Purpose
[stub: layering-patterns]
Metadata
| Author | Amit Singh |
| Scope | patterns |
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Linked from 2 notes
Low-Level Design for MAANG Interviews
A book-shaped table of contents for LLD interview prep: OOP fundamentals through SOLID, design principles, UML, design patterns, dependency management, reliability, concurrency, domain modeling, API design, testing, refactoring, classic interview problems, advanced architecture, and performance — cross-linking Object-Oriented Programming and Patterns instead of duplicating them.
Patterns
A book-shaped table of contents for reusable engineering patterns spanning object-oriented design, enterprise architecture, distributed systems, messaging, APIs, cloud infrastructure, observability, security, concurrency, AI/agentic systems, and organizational design — grounded in production experience at scale.
Related notes
03 — Transaction Patterns
Unit of Work, Identity Map, Lazy Loading, and Optimistic vs. Pessimistic Locking — the patterns that keep an object graph and its persisted state from drifting apart.
02 — Domain Modeling Patterns
DDD's tactical toolkit: Rich Domain Model vs. Anemic Model, Aggregate, Entity, Value Object, Repository, Factory, and Specification — the vocabulary a domain model needs to stay consistent under concurrent writes.
04 — Integration Patterns
DTO, Gateway, Data Mapper, Service Layer, Table Data Gateway, and Active Record — the patterns that mediate between a domain model and everything outside it (databases, external services, the wire).
Patterns
A book-shaped table of contents for reusable engineering patterns spanning object-oriented design, enterprise architecture, distributed systems, messaging, APIs, cloud infrastructure, observability, security, concurrency, AI/agentic systems, and organizational design — grounded in production experience at scale.