Architecture 🏛️

Software architecture, system design, and engineering concepts.

Sections

System Design

• System Design
• Performance

Software Concepts

• Software Engineering — Proxies, DNS, multi-tenancy, and testing
• Programming Concepts — 4-stage progressive roadmap covering execution, memory (stack/heap), types, closures, paradigms, async, and serialization

Protocols

• Protocols - HTTP, gRPC, WebSocket

Languages

• Golang — 4-stage progressive roadmap covering syntax, data structures, interfaces, concurrency, systems programming, and production microservices
• Python — 4-stage progressive roadmap covering core syntax, OOP, modern typing, asyncio, Pydantic v2, FastAPI, and production engineering

Authentication

• Identity & Auth Curriculum — 6-stage, 26-module deep dive: OIDC, JWT, OAuth 2.x, SAML 2.0, SSO, federation, security, Keycloak capstone
  • Stage 0 — Crypto, encoding, HTTP/TLS primitives
  • Stage 1 — JWT deep dive + JOSE family
  • Stage 2 — OAuth 2.0 (flows, PKCE, DPoP, 2.1)
  • Stage 3 — OpenID Connect
  • Stage 4 — Federation, SSO, SAML 2.0, B2B
  • Stage 5 — Security, attacks, hardening
  • Stage 6 — HA, performance, frontier standards
  • Capstone — Keycloak reference lab + tabletop

Observability & Telemetry

• OpenTelemetry (OTel) — Tracing, Metrics, Logs, Collector, Semantic Conventions, and Context Propagation

Architecture Foundations

• Solutions Architecture - Solution architect role, NFRs, tradeoffs
• Thinking Like an Architect
• Software Planning - ADRs, RFCs, SLOs
• Non-Functional Requirements

Reliability

• Availability - SLA, SLO, error budgets
• Resilience - Circuit breakers, retries, graceful degradation
• Load Balancing
• Idempotency

Performance

• Caching - Cache patterns, Redis
• Rate Limiting
• Percentiles - p50, p95, p99
• Performance Testing

Security

• Security Architecture - CIA triad, zero-trust
• Shift Left - DevSecOps
• TOTP

API Design

• System Design Cheatsheets
• CAP Theorem
• Concurrency
• Stateful vs Stateless
• 12-Factor App

Data Architecture

• Databases - Choosing a database, families and trade-offs
• PostgreSQL - MVCC, vacuum, indexes, connection pooling
• PostgreSQL replication and HA - Failover, backups, point-in-time recovery
• Redis - Data structures, persistence, caching patterns
• Event-driven architecture - Events, outbox, sagas, idempotency
• Apache Kafka - Partitions, replication, consumer groups, delivery semantics
• Hashing
• CDN

Architecture Patterns

• Architecture Patterns

Migration Patterns

• Migration Patterns - Blue-green, expand-contract, strangler fig, data migration

Cryptography

• Cryptography - PKI, TLS, signing

Developer Tooling

• Languages — Language-specific notes. The emphasis is on the parts of each language that matter for building and operating backend services.
• Data Architecture — Data modeling, database selection, and data flow architecture
• Reliability — Patterns for building fault-tolerant, highly available distributed systems
• Security — Security architecture patterns, zero-trust, and secure-by-design principles

More in this section

• Architecture Basics — Foundational concepts for understanding system architecture

Related

• Kubernetes Networking & Protocols
• Data Architecture & Databases
• Kubernetes - Cloud-native architecture