System Design
How to Design a Maintainable Next.js Application
A practical guide to separating routes, UI, data access, and domain logic so a Next.js project can grow without becoming difficult to change.
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20More from the notebook
Backend
Type-Safe API Validation with TypeScript and Zod
Why runtime validation matters and how schemas can protect API boundaries from malformed or unexpected input.
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Database
PostgreSQL Indexes: A Practical Performance Guide
Learn when an index helps, how composite indexes work, and why query plans should guide database optimization decisions.
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Frontend
A Frontend Performance Checklist for React Applications
A repeatable checklist for reducing unnecessary work, improving loading speed, and keeping React interfaces responsive.
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Frontend
Accessible React Components Are Better Components
Practical habits for building interfaces that work with keyboards, screen readers, different contrast needs, and real-world input methods.
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DevOps
Containerizing a Node.js Application for Production
How a small Docker image, a non-root user, and a repeatable build process make Node.js deployments safer and more predictable.
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DevOps
A Reliable CI/CD Workflow with GitHub Actions
Design a pipeline that gives fast feedback on pull requests and deploys only code that has passed repeatable checks.
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Security
Secure JWT Authentication: Principles That Matter
A concise security guide covering token lifetime, refresh flows, password storage, and authorization boundaries.
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Testing
Using the Testing Pyramid in Modern JavaScript Projects
How unit, integration, and end-to-end tests can work together to provide confidence without creating a slow and fragile test suite.
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AI
Building a Useful AI Assistant Inside a Web App
A practical architecture for context, streaming responses, safe boundaries, and a user experience that remains helpful when the model is uncertain.
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Mobile
Choosing a Mobile Architecture for Flutter and React Native
Compare feature-based organization, state boundaries, offline behavior, and API layers when building a maintainable cross-platform app.
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System Design
Event-Driven Systems: Start with the Boundary
Understand events, commands, consumers, and idempotency before introducing queues or asynchronous workflows into a production system.
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Testing
Clean Code Is a Team Communication Practice
A code review is more than a style check: it is a way to make intent, trade-offs, and future maintenance costs visible to the whole team.
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Backend
Designing Pagination and Filtering for REST APIs
Avoid slow list endpoints by choosing a pagination model, validating filters, and returning metadata clients can use reliably.
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DevOps
Observability for Full-Stack Applications
Combine logs, metrics, and traces to understand what users experience instead of guessing from isolated error messages.
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Testing
testing
testing
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Comprehensive Guide to Software Testing
An overview of all major software testing types for frontend and backend development.
2 min read
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Database
Comprehensive Guide to PostgreSQL
A brief overview of PostgreSQL, its key features, and common use cases.
2 min read
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Frontend
Introduction to Zustand
A deep dive into the small, fast, and scalable state management library for React.
3 min read
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Database
Comprehensive Guide to MySQL
A complete overview of MySQL, including features, performance, scalability, and best use cases for modern applications.
2 min read
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