Tutorials

In-depth tutorials covering system design concepts for senior engineers

🎓Recommended Learning Path

1Fundamentals

2Databases

3Architecture

4Systems

5Coding

6DevOps

7Algorithms

8Leadership

Fundamentals

(1)

Foundation45 min

System Design Fundamentals

Master the core concepts every senior engineer needs: scalability, reliability, maintainability, and trade-offs.

Topics covered:

Scalability PatternsCAP TheoremConsistency ModelsBack-of-envelope Calculations

Databases

(3)

Interactive Tool

Database Strategy Matrix

Interactive comparison of consistency, scale, and access patterns across 15+ databases.

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Database Design at Scale

Deep dive into database selection, sharding strategies, replication, and query optimization.

Topics covered:

SQL vs NoSQLSharding StrategiesReplication PatternsIndexing

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Intermediate45 min

Database Selection Guide

Master the art of choosing the right database for any system design scenario with this comprehensive interview guide.

Topics covered:

OLTP vs OLAPCAP TheoremReplication PatternsData Lifecycle

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Intermediate40 min

Caching Strategies & Patterns

Comprehensive guide to caching: from browser caching to distributed caches and cache invalidation.

Topics covered:

Cache-AsideWrite-ThroughWrite-BehindCache Invalidation

Architecture

(9)

Distributed Systems Deep Dive

Advanced distributed systems concepts: consensus algorithms, distributed transactions, and failure handling.

Topics covered:

Consensus (Paxos, Raft)Two-Phase CommitSaga PatternVector Clocks

Messaging & Event Streaming

Event-driven architectures, message queues, and stream processing for high-throughput systems.

Topics covered:

Kafka vs RabbitMQEvent SourcingCQRSExactly-Once Delivery

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Intermediate35 min

API Design & Patterns

REST, GraphQL, gRPC selection and design patterns for building robust APIs.

Topics covered:

REST Best PracticesGraphQL vs RESTgRPCAPI Versioning

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Microservices Architecture

Design, decomposition, and communication patterns for microservices at scale.

Topics covered:

Service BoundariesInter-service CommunicationService DiscoveryCircuit Breakers

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Intermediate40 min

Load Balancing & Scaling

Horizontal and vertical scaling strategies, load balancing algorithms, and auto-scaling.

Topics covered:

Load Balancing AlgorithmsAuto-scalingHorizontal vs VerticalConsistent Hashing

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Security by Design

Authentication, authorization, encryption, and security best practices for distributed systems.

Topics covered:

OAuth/OIDCJWTmTLSZero Trust

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Design Patterns: Structural

Master patterns that define object composition—Adapter, Decorator, Facade, Proxy.

Topics covered:

AdapterDecoratorFacadeProxyBridgeComposite

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Advanced API Design Patterns

Master REST best practices, GraphQL, gRPC, API versioning, rate limiting, and OpenAPI specifications.

Topics covered:

REST Best PracticesGraphQLgRPCAPI VersioningOpenAPIDocumentation

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Exactly-Once Semantics

Master idempotent operations, deduplication, two-phase commit, sagas, and consistency guarantees.

Topics covered:

IdempotenceDeduplication2PCSagasConsistency ModelsDistributed Transactions

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Systems

(5)

Real-time System Design

WebSockets, Server-Sent Events, and designing systems for real-time data delivery.

Topics covered:

WebSocketsLong PollingPresence SystemsFan-out Strategies

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Fintech System Design

Specialized patterns for financial systems: ledgers, payments, and trading platforms.

Topics covered:

Double-Entry LedgerIdempotencyReconciliationRegulatory Compliance

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ML Systems Design

Design patterns for machine learning systems: feature stores, model serving, and A/B testing.

Topics covered:

Feature StoreModel ServingOnline vs BatchExperimentation

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DNS Architecture & Design

Master DNS protocol, resolver architecture, caching strategies, DNSSEC, and global scale patterns.

Topics covered:

DNS ProtocolResolversCaching & TTLDNSSECGeoDNSAnycast

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Peer-to-Peer (P2P) Systems

Master decentralized architecture, distributed hash tables, peer discovery, and resilience in peer-to-peer networks.

Topics covered:

P2P ArchitectureDHT & KademliaPeer DiscoveryGossip ProtocolsConsistencyBitTorrent

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Coding

(5)

SOLID Principles

Master the five SOLID principles for writing maintainable, testable, extensible code.

Topics covered:

SRPOCPLSPISPDIPCode Smells

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Design Patterns: Creational

Master object creation patterns—Singleton, Factory, Builder, Abstract Factory.

Topics covered:

SingletonFactoryAbstract FactoryBuilderObject Pool

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Design Patterns: Behavioral

Master patterns that define how objects interact—Observer, Strategy, Command, Chain of Responsibility.

Topics covered:

ObserverStrategyCommandChain of ResponsibilityState

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Concurrency Fundamentals

Master multi-threading, synchronization, and concurrent data structures.

Topics covered:

Threads & ProcessesMutex & LocksRace ConditionsDeadlocksAtomics

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Code Review & Refactoring

Master code review techniques, identify code smells, apply refactoring patterns, and build quality culture.

Topics covered:

Code SmellsRefactoring PatternsNamingSeparation of ConcernsTestingReview Culture

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DevOps

(1)

CI/CD & Deployment Pipelines

Master continuous integration, continuous deployment, infrastructure as code, and reliable deployment strategies.

Topics covered:

CI/CD AutomationArtifact ManagementBlue-Green DeploymentsCanary ReleasesIaCRollback Strategies

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Algorithms

(3)

Intermediate75 min

Trees: Fundamentals & Advanced

Master tree data structures: binary trees, BSTs, balanced trees, heaps, tries—with code, pros/cons, and use cases.

Topics covered:

Binary TreesBST & TraversalsAVL & Red-BlackHeapsTriesSegment/FenwickWhen to Use Which

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Graph Theory: Fundamentals & Algorithms

Master graph data structures and essential algorithms: BFS, DFS, shortest paths, MST, and topological sort—with code, complexity, and interview patterns.

Topics covered:

BFS & DFSDijkstraBellman-FordTopological SortCycle DetectionMST

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Dynamic Programming: Master the Patterns

Demystifying DP: Overlapping subproblems, optimal substructure, and the must-know patterns from 1D sequences to 2D grids and Knapsacks.

Topics covered:

1D Sequences2D GridsKnapsack PatternsMemoizationTabulation

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Leadership

(1)

Advanced100 min

Engineering Management Frameworks

The essential frameworks used by engineering leaders at top firms — OKRs, DORA Metrics, Error Budgets, Radical Candor, Career Ladders, and Fintech compliance models.

Topics covered:

OKRs & North StarDORA MetricsPostmortemsRadical CandorTeam TopologiesRICE / MoSCoWThree Lines of DefensePsychological Safety

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