Topic · 19 lessons in 11 series

Testing

Unit, integration and end-to-end tests, test doubles, flaky tests and test strategy for a team, from the Testing series and from the lessons on APIs and front ends.

Backend in DepthWhole series →

Testing an API: Unit, Integration and ContractWhere to spend your testing effort in a backend, testing against a real database, and contract tests between the frontend and the API.15 min

Senior Frontend DepthWhole series →

Frontend Testing Strategy: Unit, Integration, E2E and What to SkipTest what users see, not how the code is built. Mock the network, not your modules. Keep end-to-end tests for the key flows only.15 min

Full-Stack QuestionsWhole series →

Team Lead MindsetWhole series →

Technical Debt, Quality and the Rewrite TrapDebt as a loan with interest, refactor or rewrite, a test plan, what to monitor, and lessons from five famous public outages.16 min

Testing From ZeroWhole series →

AI EngineeringWhole series →

Building an Evaluation Harness for an LLM FeatureA golden set, code checks and a mock judge, confidence intervals, and a CI gate that catches a regression.14 min

Security for DevelopersWhole series →

Security in Practice: Code Review Checklist, Testing, Incidents and Interview AnswersA review checklist you can use tomorrow, SAST, DAST and dependency scans, what to do in the first hour of an incident, and the security questions interviewers ask with model answers.16 min

API DesignWhole series →

Documenting APIs: OpenAPI, Contracts and TestingWrite an OpenAPI file, generate docs, validate requests and responses against it, contract tests and mock servers.13 min

React in DepthWhole series →

Patterns, Server Components and Testing ReactComposition patterns, error boundaries, portals, Server and Client Components in plain words, and testing with Testing Library.16 min

Node.js From ZeroWhole series →

Testing, Performance and Production Habitsnode:test, profiling with --cpu-prof, memory leaks, configuration, Docker basics, and a production checklist.15 min

Behavioral InterviewsWhole series →

How Behavioral Interviews Work and What They TestWhat interviewers score, the signals behind common questions, the STAR method and its limits, and how to prepare a story bank.12 min

More topics

Caching Security Authentication and authorization Performance Databases and SQL Networking and HTTP Docker and Kubernetes Observability and reliability API design Scalability and distributed systems Async and concurrency AI and LLM apps Deployment and CI/CD Architecture and design patterns React and Next.js