State ownership
Place state at the narrowest boundary that can correctly coordinate the behavior.
Interface architecture
React Application Engineering.
React scales when components model stable interface responsibilities, not when every visible fragment becomes an abstraction.
How we use it
We use React to compose complex product interfaces while keeping state, side effects, accessibility, and loading behavior understandable. Component boundaries follow product behavior and ownership rather than arbitrary file size targets.
Architecture decisions
The questions that shape the implementation
Component contracts
Expose meaningful product inputs and states instead of passing implementation details through deep trees.
Async experience
Design loading, empty, error, stale, and optimistic states as first-class behavior.
Accessibility
Use semantic controls, keyboard behavior, focus management, and announcements from the start.
Engineering practice
What disciplined use looks like
Server-first composition where supported
Small interactive client boundaries
State machines for complex flows
Reusable primitives with product-level composition
Automated accessibility and interaction tests
Measured render and bundle performance
Failure modes
What we actively design against
Global state for local concerns
Effects used to derive ordinary values
Abstract components with unclear product meaning
Visual states that omit keyboard and assistive technology behavior
Appropriate use cases
Operational dashboards
Multi-step workflows
Design systems
Collaborative interfaces
Customer account experiences
Data-rich administration tools
Technical questions
Is React a complete application architecture?
No. React primarily addresses interface composition. Routing, server execution, data access, security, caching, and deployment require additional architectural decisions.
How do you keep a React codebase maintainable?
We make ownership explicit, minimize unnecessary shared state, keep side effects controlled, preserve accessible semantics, and test behavior at stable boundaries.
Related expertise