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The directory

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Every track, grouped by area. 46 tracks across 460 chapters. Hover a folder to open its topics.

System Design Core system design concepts and case studiesSystem Design: Zero to Mastery A complete curriculum for engineers who have never designed a system: estimation, storage, scaling, failure, and six end-to-end project designsDSA Data structures and algorithmsNetworking How the internet works, TCP/IP, DNS, HTTPDB Internals Storage engines, B-trees, WAL, MVCCSQL Querying, joins, indexes, transactions, and query optimizationOperating Systems Processes, threads, memory, scheduling, and system calls
Go Go from fundamentals to productionFrontend Rendering patterns, state management, performance
API Design REST, pagination, versioning, rate limitingGraphQL Schema design, resolvers, subscriptionsgRPC Protobuf, streaming, interceptors, TLSWebSockets Real-time, pub/sub, presence, backpressureWebhooks Sending, signing, retries, idempotency
Linux / VPS SSH, systemd, firewall, processesWeb Servers Nginx, reverse proxy, edge cachingTLS & Certs Let's Encrypt, ACME, certificate managementDevOps Containers, Kubernetes, CI/CD, IaCContainers Docker fundamentals and patternsOrchestration Kubernetes and container orchestrationIaC Infrastructure as code, Terraform
Data Modeling Entities, normalization, schema evolutionNoSQL Key-value, document, wide-column, and graph data modelsAuth & Security Authentication, authorization, security patternsAPI Gateway Gateway patterns, routing, aggregationCaching Cache strategies, Redis, CDNRedis Data structures, persistence, pub/sub, streams, and clusteringBackground Jobs Job queues, workers, schedulingMessaging Message queues, Kafka, RabbitMQEvent-Driven Event sourcing, CQRS, Saga patternStorage Object storage, block storage, file systemsSearch Full-text search, Elasticsearch, indexing
Video Codecs, containers, transcoding, packaging, ABR streaming, and delivery
Load Balancing Algorithms, health checks, session affinityHorizontal Scaling Stateless services, auto-scalingReplication & Sharding Database scaling strategiesDistributed Systems CAP, consistency, consensus, ordering, and distributed transactions
Observability Metrics, logging, tracing, alertingSRE SLIs, SLOs, incident response, chaos engineeringTesting Unit, integration, E2E, contract testingPerformance Profiling, optimization, benchmarkingDisaster Recovery RTO, RPO, backup strategiesCapacity & Cost FinOps, capacity planning, cost optimizationMicroservices Service boundaries, communication, patternsChaos & Resilience Fault injection, circuit breakers, bulkheads
Ethical Hacking Penetration testing, OSINT, exploitation, CTF, from zero to professional

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