Frontend Engineering
How I design, build, and scale modern frontend applications.
Frontend Philosophy
Frontend engineering is more than UI—it's about crafting maintainable systems that scale with your product and team.
Component-Driven Design
Build UI as isolated, reusable components. Design systems emerge from well-structured primitives.
Predictable State
State flows in one direction. Changes are explicit and traceable. Debugging is straightforward.
Scalability First
Choose boring technology that works at scale. Avoid clever solutions that break under pressure.
Core Topics
Organized by concepts with interview notes and personal insights.
Components & Hooks
- Functional components are the standard—class components are legacy
- Custom hooks extract and share stateful logic across components
- Rules of hooks: call at top level, only in React functions
Rendering Lifecycle
- Render → Commit → Effects (useEffect runs after paint)
- useLayoutEffect for DOM measurements before paint
- StrictMode double-renders to catch side effects in development
Controlled vs Uncontrolled
- Controlled: React owns the state, single source of truth
- Uncontrolled: DOM owns the state, use refs to access
- Controlled for validation-heavy forms, uncontrolled for simple inputs
Real-World Applications
How these concepts come together in production applications.
Enterprise Dashboards
Role-based access, complex data visualization, real-time updates.
- Permission-aware rendering
- Efficient chart updates
- State sync across tabs
Admin Panels
CRUD operations at scale, bulk actions, configurable workflows.
- Dynamic form generation
- Optimistic batch updates
- Undo/redo functionality
High-Interaction Interfaces
Drag-and-drop builders, rich text editors, collaborative features.
- Complex gesture handling
- Conflict resolution
- IndexedDB persistence
Learn the Right Way
A structured learning roadmap for mastering this domain.
React Fundamentals
Core concepts, hooks, and patterns
State Management Deep Dive
Redux, Zustand, and when to use what
Performance Mastery
Profiling, optimization, and best practices
Scalable UI Architecture
Design systems and component libraries
Testing Strategies
Unit, integration, and E2E testing
Advanced TypeScript for React
Generics, inference, and type-safe patterns