React & Frontend Engineering

Deep dive into React, state management, performance, and frontend system interviews for modern product teams.

Specialist

Intermediate

5 weeks

Overview

Go beyond component tutorials. This course covers hooks, rendering performance, design systems, accessibility, and the frontend topics hiring panels ask in senior developer interviews.

Across five weeks you build a production-shaped UI foundation, tighten state and data flow, profile performance, organise reusable UI patterns, then practice frontend system design and take-homes.

Learning pathway

Follow the phases below from setup to outcomes. Each phase maps into the weekly plan.

React foundations

Lock project structure, components, and TypeScript conventions.

State & data flow

Implement hooks, context, fetching, and predictable updates.

Performance & quality

Profile rendering, optimise bundles, and raise accessibility.

Design systems

Organise reusable UI patterns and responsive layout systems.

Frontend interviews

Practice frontend system design and take-home reviews.

Phase 1: React foundations

Lock project structure, components, and TypeScript conventions.

Phase 2: State & data flow

Implement hooks, context, fetching, and predictable updates.

Phase 3: Performance & quality

Profile rendering, optimise bundles, and raise accessibility.

Phase 4: Design systems

Organise reusable UI patterns and responsive layout systems.

Phase 5: Frontend interviews

Practice frontend system design and take-home reviews.

Week-by-week plan

See what you cover, what you do, and what you ship each week—so progress stays concrete.

Week 1

Architecture & TypeScript UI

Start with a maintainable React foundation hiring managers respect.

What you cover

Folder architecture
Component APIs
TypeScript props/state
Routing foundations

What you do

Audit or scaffold a product UI
Establish lint and type rules
Mentor review of component boundaries

Week deliverable: Typed UI shell with core routes

Week 2

State, fetching, and errors

Make data flow boringly reliable.

What you cover

Hooks patterns
Server state vs UI state
Caching/fetch strategy
Error boundaries

What you do

Implement loading/error/empty states
Refactor prop drilling hotspots
Live debugging workshop

Week deliverable: Primary user flow with resilient data fetching

Week 3

Performance & accessibility

Raise craft: fast enough, usable by more people, measurable.

What you cover

Render profiling
Memoisation trade-offs
Bundle size
a11y basics and keyboard flows

What you do

Profile a slow screen and fix it
Accessibility pass on key flows
Before/after metrics write-up

Week deliverable: Performance and a11y checklist signed off

Week 4

Design system & polish

Systematise UI so features ship without visual debt.

What you cover

Tokens and spacing
Reusable primitives
Responsive layouts
Story-like documentation

What you do

Extract shared components
Document usage notes
Visual consistency review

Week deliverable: Small design-system subset used by the app

Week 5

Frontend interviews & take-homes

Convert craft into interview performance.

What you cover

Frontend system design
Take-home strategy
Trade-off communication
Portfolio demo script

What you do

Frontend design mock
Timed take-home review
Pietecx final feedback

Week deliverable: Interview-ready demo and take-home notes

What you will learn

Advanced React patterns and component architecture
State management, data fetching, and error boundaries
Performance profiling and bundle optimisation
CSS architecture and responsive product UI
Frontend system design interview practice
Take-home assignment review with engineers

Enroll in React & Frontend Engineering

Send a message to our engineering team to request enrollment, remote corporate cohort delivery, or premium upgrade options.

Duration: 5 weeks · 5 weekly milestones with Pietecx feedback.

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