Mastering Definition of Done, Testing Patterns, and Enterprise Practices
A comprehensive course covering everything a frontend engineer must know to deliver enterprise-grade, production-ready code. Learn testing patterns, best practices, and the critical Definition of Done (DoD) that separates hobby projects from production systems.
This course transforms frontend developers into production-ready engineers who can confidently ship enterprise-grade applications using the latest technologies. You'll master React 19, Next.js 15, modern testing patterns, and the critical Definition of Done (DoD) that separates hobby projects from production systems.
- ✅ Production-ready mindset and engineering principles
- ✅ Definition of Done (DoD) for enterprise development
- ✅ Comprehensive testing strategies with React 19 and Next.js 15
- ✅ Component development with Storybook and visual testing
- ✅ Advanced architecture and code organization
- ✅ React 19 Actions, useOptimistic, and modern state management
- ✅ Next.js 15 with Turbopack and async request APIs
- ✅ CI/CD and DevOps awareness for frontend engineers
- ✅ Monitoring, observability, and performance optimization
- ✅ Security and accessibility best practices
- ✅ Team workflows and documentation standards
- ✅ Senior-level interview preparation
- ✅ Production-ready capstone project
Duration: ~40 hours of study across 15 comprehensive modules
Format: Theory + Practical exercises + Real-world examples + Interview prep
Level: Intermediate to Advanced → Senior Engineering
Understanding what production-ready means and why it matters in enterprise development.
Learn to define and apply DoD in real projects with enterprise-level checklists.
Master testing strategies: AAA, GWT, SEAT, property-based testing, and more.
Apply patterns using Jest, Vitest, React Testing Library, Playwright, Cypress, and Storybook with Next.js 15 and React 19.
SOLID principles, error handling, TypeScript, React 19 Actions, Next.js 15 features, and modern architecture patterns.
Core Web Vitals, performance budgets, caching, and observability.
OWASP best practices, XSS prevention, WCAG compliance, and inclusive design.
Technical documentation, ADRs, and maintainable code practices.
Agile DoD, PR practices, branching strategies, and CI/CD integration.
Build a production-ready e-commerce feature applying all learned concepts.
Feature-based architecture, monorepo strategies, microfrontends, and scalable state management.
Comprehensive CI/CD pipelines, containerization, feature flags, and deployment strategies.
Error tracking, performance monitoring, structured logging, and production health metrics.
Advanced Core Web Vitals optimization, bundle optimization, caching strategies, and performance budgets.
Senior frontend engineer interview preparation with system design, coding challenges, and behavioral questions.
- Prerequisites: Basic React/frontend knowledge, familiarity with testing concepts
- Setup: Clone this repository and follow module-specific setup instructions
- Study Path: Follow modules sequentially or focus on specific areas
- Practice: Complete exercises and build the capstone project
- React 19 Actions: Learn
useActionStateanduseOptimisticfor modern form handling - Custom Elements Support: Integrate web components seamlessly with React
- Next.js 15 Turbopack: Faster development builds and enhanced performance
- Async Request APIs: Improved caching and data fetching patterns
- Component Development: Isolated component development and testing
- Visual Testing: Automated visual regression testing with Chromatic
- Accessibility Testing: Built-in a11y testing in every story
- Performance Testing: Performance budgets and Core Web Vitals monitoring
- MSW Integration: API mocking in Storybook for realistic testing
- React 19 Testing: Complete patterns for testing Actions and optimistic updates
- Next.js 15 Testing: App Router testing with Turbopack integration
- Storybook Test Runner: Automated testing within component stories
- Visual Regression: Chromatic integration for visual testing
- Unit Testing: Jest, Vitest
- Integration Testing: React Testing Library
- E2E Testing: Playwright, Cypress
- Component Testing: Storybook Test Runner
- Visual Testing: Chromatic, Percy
- Accessibility Testing: axe-core, Storybook a11y addon
- React 19 Testing: Actions, useOptimistic, Custom Elements
- TypeScript (strict mode)
- React 19 (Actions, useOptimistic, Custom Elements, improved hydration)
- Next.js 15 (Turbopack, async request APIs, enhanced error handling)
- Storybook 8+ (component development, visual testing, accessibility testing)
- State Management: Context, Redux Toolkit, Zustand, React 19 Actions
- API Layer: SWR, React Query, RTK Query
- Architecture: Microfrontends, Module Federation, Monorepos
- CI/CD: GitHub Actions, Docker, Kubernetes
- Build Tools: Webpack, Vite, Turbopack (Next.js 15), advanced optimization
- Package Management: NPM, Yarn, pnpm strategies
- Component Development: Storybook, Design Systems, Visual Testing
- Performance: Lighthouse, Core Web Vitals, Performance Budgets
- Monitoring: Sentry, LogRocket, DataDog, New Relic
- Security: OWASP guidelines, CSP, XSS prevention
- Accessibility: WCAG 2.1 AA compliance, automated testing
By completing this course, you will:
- Think Production-First: Develop a mindset that prioritizes reliability, scalability, and maintainability
- Master DoD: Create and apply comprehensive Definition of Done checklists
- Test Effectively: Use appropriate testing patterns and strategies for different scenarios
- Architect Systems: Design scalable frontend architectures with proper separation of concerns
- Implement DevOps: Set up CI/CD pipelines and deployment strategies for frontend applications
- Monitor Production: Implement comprehensive monitoring, observability, and performance tracking
- Optimize Performance: Master Core Web Vitals optimization and advanced performance techniques
- Secure Applications: Implement security best practices and prevent common vulnerabilities
- Document Professionally: Create maintainable documentation and handoff materials
- Lead Teams: Collaborate effectively, mentor junior developers, and align with agile practices
- Interview Successfully: Prepare for senior frontend engineer roles with confidence
- Clean Code by Robert C. Martin
- Building Micro-Frontends by Luca Mezzalira
- Testing JavaScript by Kent C. Dodds
- Web Performance in Action by Jeremy Wagner
- The Staff Engineer's Path by Tanya Reilly
- Designing Data-Intensive Applications by Martin Kleppmann
- Web.dev Performance
- OWASP Frontend Security
- WCAG Guidelines
- Testing Library Docs
- React Patterns
- Frontend System Design
- Performance Budgets
This course is designed to be a living resource. Contributions are welcome:
- Submit issues for corrections or improvements
- Add new examples or exercises
- Share real-world case studies
- Update tool recommendations
This course content is available under the MIT License. See LICENSE for details.
Ready to become a production-ready frontend engineer? Start with Module 1: Production-Ready Mindset