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Hall of Fame

Hall of FameAdam Wiggins20111 min readintermediate

The Twelve-Factor App

Read on 12factor.net

Summary

The Twelve‑Factor App outlines a set of twelve best‑practice guidelines for building SaaS applications that are portable, scalable, and maintainable. Following the factors—codebase, dependencies, config, backing services, build/release/run, processes, port binding, concurrency, disposability, dev/prod parity, logs, admin processes—helps teams ship reliably to modern cloud platforms.

  • Store configuration in environment variables, never in code.
  • Treat backing services as attached resources accessed via URL.
  • Separate build, release, and run stages strictly.
  • Run the app as one or more stateless processes.

Engineers and ops teams building SaaS services should know these principles to avoid lock‑in and operational friction.

6/10
devopsapi designarchitecturedistributed systems

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