SYSTEM DESIGN HUB 19 Tracks 8 Interactive Simulators

Master System Design & Software Architecture

Don't memorize static diagrams. Learn how to derive scalable, resilient, and cost-effective architectures from first principles—spanning HLD, LLD, distributed consensus, machine coding, and 2026 AI-native agentic systems.

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STRUCTURED ROADMAPS

Role-Based Guided Learning Paths

Tailored progression roadmaps designed to take you from foundational computer mechanics to Staff/Principal-level architecture defense.

Foundations ⏱️ ~12 Hours

Foundations to Distributed Systems

Start from CPU and network realities, advance through API design, persistent storage, and distributed consensus.

Target Audience:

Software engineers wanting genuine first-principles understanding of distributed architecture.

HLD Track ⏱️ ~16 Hours

High-Level Design & System Scaling

Master the 12-step HLD framework, capacity estimations, fault tolerance, and comprehensive real-world case studies.

Target Audience:

Mid to Senior engineers designing high-scale cloud platforms and preparing for architecture interviews.

LLD & Code ⏱️ ~14 Hours

LLD, Patterns & Machine Coding

Master SOLID principles, design patterns, thread safety, and runnable machine-coding implementations in 45–60 minutes.

Target Audience:

Engineers preparing for low-level design, clean coding loops, and technical leadership.

2026 AI Native ⏱️ ~10 Hours

Agentic AI & Non-Deterministic Systems

Bridge distributed systems with generative AI: Reflection, Plan & Solve, Tool calling, MCP protocols, and RAG vector search pipelines.

Target Audience:

Backend and systems architects integrating production LLMs and autonomous agent workflows.

Staff / Principal ⏱️ ~8 Hours

Staff / Principal Architecture & Governance

Operate, defend, migrate, and evolve systems over five-year horizons using ADRs, fitness functions, and cost trade-offs.

Target Audience:

Senior engineers stepping into Staff, Principal, and Lead Architect responsibilities.

FULL CURRICULUM

Explore All 19 Architecture Tracks

Organized by foundational layers, persistence models, high-scale resilience, object-oriented design, and advanced distributed consensus.

BEGINNER Core CS

Foundations

Hardware realities, latency vs throughput, process and thread models, memory hierarchies, and core mental models for architectural reasoning.

BEGINNER Protocols

Networking & Transport

TCP 3-way handshakes, UDP trade-offs, TLS 1.3 cryptographic handshakes, DNS resolution mechanics, and HTTP evolution through HTTP/3 and QUIC.

BEGINNER API Design

APIs & Communication

Stateless REST, GraphQL queries, low-overhead binary gRPC via Protocol Buffers, persistent WebSockets, SSE, idempotency keys, and backward compatibility.

INTERMEDIATE Persistence

Databases & Storage

B-Trees vs LSM-Trees, Write-Ahead Logs (WAL), SSTables, Bloom filters, ACID transactions, isolation anomalies, query planners, and sharding.

INTERMEDIATE In-Memory

Caching & Performance

Cache-aside, read-through, write-through, write-back, TTL expiration, LRU/LFU eviction math, and preventing thundering herds and stampedes.

INTERMEDIATE Distributed

Distributed Systems

Partial failures, network partitions, PACELC theorem, quorum reads/writes, consensus via Raft and Paxos, distributed locking, and fencing tokens.

INTERMEDIATE Async Pipelines

Messaging & Streaming

Point-to-point queues, publish-subscribe, append-only event logs, Kafka partition ordering, consumer lag, Change Data Capture (CDC), and outbox patterns.

ADVANCED Resilience

Reliability Engineering

Timeout budgets, exponential backoff with full jitter, circuit breaker state machines, bulkheads, load shedding, graceful degradation, and SLO error budgets.

ADVANCED Capacity Math

Scalability & Capacity

Traffic estimation, peak QPS multipliers, storage and bandwidth calculations, memory sizing, connection pooling, and Little's Law for server capacity.

INTERMEDIATE Macro Architecture

High-Level Design (HLD)

A 12-step architectural blueprint: decomposing requirements into scale budgets, API contracts, data models, resilient topologies, and defensible trade-offs.

INTERMEDIATE Object-Oriented

Low-Level Design (LLD)

The 5-step machine coding framework: clarifying requirements, domain entity modeling, SOLID principles, composition over inheritance, and thread safety.

BEGINNER Design Patterns

Design Patterns

Problem-driven design patterns: Strategy, State, Observer, Factory, Facade, plus distributed primitives like Circuit Breaker, Saga, and Transactional Outbox.

ADVANCED Hands-On Code

Machine Coding

45–60 minute runnable implementations: Multi-Floor Parking Lot, Elevator Controller (SCAN algorithm), LRU + TTL Cache, and Rate Limiter engines.

ADVANCED Zero-Trust

Security Architecture

Authentication tokens, RBAC vs ABAC, OAuth 2.0 / OIDC, secrets rotation, encryption at rest/in transit, threat modeling, tenant isolation, and supply chain security.

ADVANCED Telemetry

Observability & Operations

Structured logging, Prometheus metrics, distributed tracing with correlation IDs, RED & USE operational methods, alerting thresholds, and postmortems.

ADVANCED Cloud Native

Cloud & Infrastructure

Regions, Availability Zones, VPC peering, L4/L7 load balancers, managed databases, Kubernetes orchestration concepts, and Infrastructure as Code.

ADVANCED Agentic Systems

AI-Native Architecture

Managing non-deterministic LLM runtimes: Reflection, Plan & Solve, Tool Use, Multi-Agent Collaboration (MCP/A2A), HITL gates, and RAG vector search pipelines.

ALL Case Studies

System Design Case Studies

Step-by-step evolutionary architectures from single node to global scale: URL Shortener, Distributed Cache, Real-Time Chat, and Distributed Rate Limiters.

EXPERT Staff Engineer

Staff / Principal Architecture

Architecture Decision Records (ADRs), organizational domain boundaries, migration blueprints, fitness functions, tech debt governance, and reliability economics.